How Close Can You Build A Structure To Your Septic Tank? (Best solution)

How close can a proposed house addition be from a septic system? – A full foundation must be 10 feet from the septic tank and 20 feet from the leaching area. – A slab foundation such as a garage must be 10 feet from the septic tank and 10 feet from the leaching area.

  • – A full foundation must be 10 feet from the septic tank and 20 feet fromthe leaching area. – A slab foundation such as a garage must be 10 feet from the septic tank and 10 feet from the leaching area. – Concrete columns for a deck must be 5 feet from the leaching area and not disturb the septic system.

What is the minimum safe distance from the septic tank?

At least 15m from the nearest water supply. This is a minimum and should be more if the ground is rocky and fissures could take the outflow further. It should be at least 3m from the nearest building. Avoid areas where rainwater would stand or flow over the tank or vehicles could drive over it.

How close to a septic tank can I build a patio?

It is usually not a good idea to build a deck near or on top of a septic tank. Most zoning ordinances will require that you maintain at least a 5′ setback from an underground septic system.

Can I build a porch over my septic tank?

You should never build a deck over a septic field; doing so will prevent the natural draining and dissipation of the effluent. This can ruin the septic system, not to mention releasing foul smells into the air all around your deck. The dissipating effluent can also rot the deck from underneath.

Can you put a concrete patio over a septic tank?

You should not build a patio over or near a septic tank. Septic tanks are not built to withstand the weight of a concrete slab or pavers and you risk damaging the tank or the waste lines. You should make sure there is a 5 foot distance between the edge of the septic tank and any heavy materials.

How close can leach field be to house?

Common guidelines require at least 50′ clearance distance between a well and a septic system tank or 150′ between a well and a septic drainfield or leaching bed but you will see that different authorities may recommend different distances. Local soil and rock conditions can make these “rules of thumb” unreliable.

How far down is a leach field?

A typical drainfield trench is 18 to 30 inches in depth, with a maximum soil cover over the disposal field of 36 inches.

Can you put a paver patio over a septic tank?

You can’t build a paver patio on top of a septic tank, and doing so could be against the planning laws of your state or local area. Septic tanks can take very little weight without getting damaged, and you’ll also need access to the tank in the future too. You shouldn’t build a deck on one either.

Can you build a patio over a leach field?

A common question homeowners ask when building a patio is, “can you build a patio over a septic field?” The answer to this question is no. The reason for this is that the weight of the concrete in the foundation will cause too much pressure on your septic system and can lead to flooding or a damaged septic tank.

Can you put a septic tank under a garage?

No, you cannot. The septic field needs to have no construction above it. It will stop working properly. If you want the garage where the septic leach field is, construct a new septic leach field.

How close can you build next to a drain field?

– A full foundation must be 10 feet from the septic tank and 20 feet from the leaching area. – A slab foundation such as a garage must be 10 feet from the septic tank and 10 feet from the leaching area. – Concrete columns for a deck must be 5 feet from the leaching area and not disturb the septic system.

Can I put a fire pit over my septic field?

Can You Have A Fire Pit Over A Septic Tank. When you are building a DIY fire pit, you should never place it over a septic tank. Moreover, it would be best if you didn’t put it in the leach field for safety reasons related to underground pipes and methane gas.

Can you build over an abandoned leach field?

Overall, it is not recommended to build over your leach filed and you should also not put anything heavy on top of it, such as parking a vehicle.

What can you put over a septic tank?

Put plastic sheets, bark, gravel or other fill over the drainfield. Reshape or fill the ground surface over the drainfield and reserve area. However, just adding topsoil is generally OK if it isn’t more than a couple of inches. Make ponds on or near the septic system and the reserve area.

Can you walk on a leach field?

Your family can walk on a well-maintained drain field without fear of encountering puddles of affluent and dangerous bacteria. Bicycles and tricycles are also acceptable because they are not heavy enough to compress or disturb the soil.

Can you put mulch over septic tank?

Gardens. Landscape fabric, plastic, bark, or mulch should not be used over your septic system. These materials reduce air exchange while bark and mulch also retain excess moisture. Adding more than a few inches of soil over the drainfield, such as for raised beds, limits air exchange and can lead to compaction.

Building Near and Over Septic Tanks

Posted on a regular basis In most cases, minimum setback rules imposed by the Texas Commission on Environmental Equality (TCEQ) preclude the building of a new residence from occuring over any point of an existing sewage disposal system. Foundations, pools, property lines, wells, and other structures must be kept at a certain distance from the septic tank and drainfield in order to meet these setback requirements. It is possible that some homeowners will install objects such as patio decks or house additions over their systems, whether by accident or design.

Building over septic tanks

Construction of a building over any section of your septic system is not recommended. The most typical issue we see is when someone wants to pump out their septic tank but is unsure of where their tank is situated on their property. Tanks hidden beneath a hardwood deck, pool patio, driveways, or even room extensions are not unusual for us to discover and investigate. The majority of the time, this occurs because the homeowner is uninformed of the tank’s location and/or does not have a plan in place for future tank maintenance.

However, in this scenario, the homeowner will be able to pump out their septic tank because no permanent constructions should be constructed over any component of the system.

Building over drainfields

In order for the drainfield to function, water in the solids and some evapotranspiration must be absorbed. In order for bacteria in the soil beneath a drainfield to treat wastewater from a drainfield, the soil beneath the drainfield must have sufficient oxygen. However, if a permanent structure is constructed over a drainfield, it has the potential to reduce the amount of oxygen that can be absorbed by the soil and hence reduce evapotranspiration. The potential of causing the drainfield lines to collapse is a significant concern when constructing over them.

Depending on the age of your system and the restrictions of your local authorities, repairing or shifting your drainfield may need the installation of a whole new system.

We can assist you with any of your wastewater system needs, and our specialists can also assist you with your septic installation and maintenance requirements: 210.698.2000 (San Antonio) or 830.249.4000 (Austin) (Boerne).

How Remodeling Can Affect Your Septic System

Building near a septic tank and drain field may have a negative impact on the performance of any septic system, and it is easy to ignore this while upgrading a property. This is also true for people who are considering purchasing a property and intend to remodel it. It is preferable if you are aware of the exact location of your tank and drain field. This will prevent new construction projects from interfering with the normal maintenance of your system or causing damage to your septic tank. Before beginning on any big job that may include your septic system, make sure you have a solid understanding of septic systems under your belt.

Take a look at our ebook, which is provided below. It is an excellent resource that can help you feel much more confident about owning, maintaining, and renovating in close proximity to a septic system.

Building Near aSeptic Tank

What may possibly happen if you fail to locate your system? It is possible that your septic tank is in the route of a huge construction truck. It would be the least of your worries if your septic tank lid were to break. Cracks in the septic tank may be caused by the weight of building equipment on the site. It is possible that these will not be apparent soon after the event. Cracks will grow with time, however, and will pose a major structural threat over time. In most cases, a tank is clearly marked in some way to make it easier to locate.

  • This will guarantee that the driver is aware of the exact location of the tank and that the tank has enough space to move about.
  • In addition to causing damage to your tank, construction may prevent a pumper from entering the tank.
  • This not only makes it difficult to locate the tank, but it also makes it difficult, if not impossible, to maintain it.
  • If you have a deck or patio that prevents access to the tank, you may be forced to demolish the building, squandering the money you invested on its construction.

Building Near aDrain Field(Leach Field)

If a drainage field is destroyed, the expense of replacing it might be significantly higher. The most serious problem that might occur from building near a drain field is the damage that heavy construction equipment can inflict to the drain field. The weight of a large number of heavy trucks moving over a drain field will shatter the pipes in the drain field and compress the soils beneath the trucks. Compacted dirt in a drain field will impair the ability of the drain field to drain effectively.

Without any air pockets to fill, the effluent will be pushed to rise towards the surface of the soil, where it will eventually pour out onto the ground.

A few instances of how construction near a drain field might potentially result in a problem are shown below.

Problems Building Near a Drain Field

  • Building an in-ground pool would almost certainly need a permit, but it is critical that it be located away from your drainfield. The most obvious issue would be if you were to cut into your drainage system. However, even approaching too close might cause soil compaction in the surrounding area, reducing the life expectancy of the drain field. An above-ground pool adds a significant amount of weight to the earth. It is common to see sheds built on top of leach fields because the water that drains out will soak down into the drainfield and add a significant amount of water. While it is possible that the weight of the shed could cause some soils to contract, it is also likely that traffic from machines would increase. Larger sheds and pole barns should be maintained away from drainfields at all costs. They are unquestionably large and heavy enough to cause issues. They are also large enough to accommodate heavy vehicles, which will further exacerbate the situation. Some individuals choose to build gardens on top of the drain field to beautify the area. Make certain that you are not growing anything with roots that are large enough to penetrate the pipes. In most cases, there is a two-foot layer of dirt cover, but this might vary. When in doubt, it’s advisable to be careful and move the garden to a different location. Fence posts are commonly found in and around gardens. Make certain that the posts are not too large that they are digging into the drain field stone (aggregate). It is possible that huge posts or poles that are buried too deeply will pose an issue. Decks, flagpoles, and huge fences are examples of structures that might cause this. When a septic tank is replaced, it is possible that a leach field will be harmed. The big trucks required to transport the concrete septic tank will have a negative impact on the soils. A plastic septic tank is an excellent solution for completely avoiding the problem. Because they are small and lightweight, they can be carried by hand.
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Having established the dangers associated with developing near your septic system, we can go on to discussing ways to avoid any difficulties from arising in the future. The most effective technique of preventive is to be aware of the locations of each component of your system.

How to Locate Your Septic System

Keeping track of where your system is at all times might be a challenge. A large number of consumers only get a glimpse of the entire system during the house purchasing inspection process. In the event that you still have access to your report, it may contain information on the system’s location, as well as a 2-D drawing of the system’s layout. We will provide photographs with our report in order to provide a more accurate reference for the location of the system components. The option to have someone come out and find your system is always available if you have misplaced your report.

Building near a septic tank and drain field can be hazardous, so exercise caution and use common sense while constructing any structure in the vicinity. To understand much more about having a septic system and how to properly maintain it, please see our booklet by clicking on the link below.

How close to a septic tank can you build?

It is necessary to have a full foundation at least 10 feet away from the septic tank and 20 feet away from the leaching area. It is necessary to have a slab foundation for a structure such as a garage 10 feet away from the septic tank and 10 feet away from the leaching area. Concrete columns for a deck must be placed at least 5 feet away from the leaching area so that they do not interfere with the septic system. It is not recommended to construct a structure over the septic tank or the leach field.

  • Anything that has accumulated on top of the tank would have to be removed in order to allow for pumping and repairs.
  • In addition to the aforementioned, where should a septic tank be located?
  • It is reasonable to wonder how far apart septic lines should be placed as a result of this.
  • The answer is that, thankfully, it is possible to connect the plumbing systems of two separate units to the same septic tank.

How close can you build a home addition to a septic tank system in Florida?

A septic system cannot be situated closer than 5 feet from the foundation of a house or the foundation of a manufactured home. However, while sidewalks, decks, and patios are not subject to the 5 foot limit, you are not permitted to place a drainfield beneath them. Any tank located underneath a driveway must have a lid that has been constructed by a Florida-licensed engineer to withstand the expected traffic load. The following is an extract from the Florida Administrative Code that is relevant: 64E-6.005 (2) Unless property lines abut utility easements that do not contain underground utilities, or unless recorded easements are specifically provided for the installation of systems for service to more than one lot or property owner, systems shall not be located under buildings or within 5 feet of building foundations, including pilings for elevated structures, or within 5 feet of mobile home walls, pool walls, or within 5 feet of property lines.

  1. (a) Sidewalks, decks, and patios are exempt from the 5 foot setback requirement; however, drainfields are not permitted to be placed beneath these types of buildings.
  2. Concrete constructions that are intended to be erected over a septic tank must have a barrier of soil or plastic material placed between the structure and the tank in order to prevent the structure from adhering to the tank.
  3. as well asDoes it make sense to upgrade my septic tank when I plan a house addition?
  4. See the following blog pages for further information about SEPTIC TANK SYSTEMS: When it comes to gray water reuse in Florida, what are the requirements of the building code?
  5. What is it about septic tank contractors that makes them urge you to get rid of your garbage disposal?
  6. Is it necessary to re-certify a septic tank after a residence has been empty for a period of time?
  7. How frequently should I get my septic tank pumped?
  8. What happened to the septic tank?
  9. It is possible for a house to have more than one septic tank.

If the washing machine drain is diverted to a nearby piece of ground in the yard, is this permissible? You may find further relevant blog entries on this subject by visiting ourSEPTIC TANK SYSTEMSpage or by using theINDEXfor a comprehensive listing of all our articles.

How far away from a septic tank can you build?

However, while the requirements will differ from one place to another, the standard minimum distance from the home is 10 feet. Most of the time, the contractor will excavate for the septic tank and system at the same time as he digs the footings for the home foundation. It is necessary to have a full foundation at a distance of 10 feet from the septic tank and 20 feet from the leaching area. When building a carport or other slab foundation, it must be at least 10 feet from the septic tank and 10 feet from the leaching area.

  1. Also, is it possible to construct structures over septic systems?
  2. It is not recommended to build permanent structures above septicfieldlines due to the high amounts of moisture present and the necessity for open air circulation.
  3. Structures with foundations may be able to trap moisture beneath the structure’s foundation.
  4. Yoursepticsystem site plan is normally created directly on top of your property survey, indicating the septic tank’s setbacks from the house and the tank’s location.
  5. What is the distance between the septic tank and the house?

How Far Should You Put the Septic Tank From the House?

Image courtesy of Kwangmoozaa/iStock/Getty Images.

In This Article

  • Amount of distance from the home
  • Basic safety concerns
  • Suggestions for a successful installation

For those who don’t have access to a municipal sewage system, an alternate solution, such as a septic tank and field lines, will be required. The design and operation of these systems are fairly straightforward. When designing a septic system, you must keep in mind the requirements of local construction codes as well as public health concerns.


Depending on where you live, local ordinances and regulations that specify the distance between the septic tank and the home vary. However, the normal minimum distance is 10 feet between the two structures. Consult your local ordinances and regulations for a detailed answer as to how far your septic tank must be installed from your home. Requirements differ from one location to the next, although the standard minimum distance from the home is 10 feet in most cases. In the case of a private well for drinking water, however, keep in mind that many state departments of health demand a minimum distance of 50 feet between a new septic tank and a well.

It is possible that the septic tank will be placed considerably closer to the structure since it will be easier and require less plumbing in some cases.

It is ultimately your responsibility as a homeowner to determine where your tank will be installed; thus, keep a careful eye on the issue as your home is being built.

Basic Safety Considerations

If you’re the type of person who prefers to do things on their own, there are certain important measures you should take before starting this endeavor. Before you start digging the hole for the tank, call your local utility providers to find out where the service lines are located. A gas line, water line, phone line, or electrical connection that has been severed is not only potentially dangerous, but it may also be extremely expensive to repair. Once you have finished excavating the hole, proceed with caution.

It’s also important to understand that a concrete septic tank can weigh up to 5 tons.

Make sure the hole is available when the tank is delivered so that it can be installed straight in the desired location.

Tips for a Successful Installation

Plan ahead of time to get your water supply switched on prior to installing your septic tank. You must fill the tank with water as soon as it is placed in its final position for this to be possible. This has absolutely nothing to do with the septic system itself, but it is a prudent precaution. In the event of a heavy downpour, the groundwater may swell and a septic tank may float out of the ground, even if it has been buried. If this occurs, contact a qualified professional immediately. Repairing any damage done to the lines or to the tank itself, as well as putting the tank back in its original location, may be a costly and time-consuming endeavor.

Initially, you may be confident that you will remember the exact location of the marker when it is time to top up the tank — which is generally every three to five years — but your memory may fade over time.

How Far Does A Septic Tank Have To Be From A House

Has it occurred to you that you need to install a new septic tank for your house, or that you are constructing and planning your ideal home for the first time? In any case, you must ensure that your septic tank is installed in the proper location so that it may perform its functions without interfering with the operation of the house. Septic tanks or fields must be located at least five feet away from your residence. In most circumstances, however, tanks are situated even further away from the house, often around 10 feet away in most cases, while leach fields are located approximately twenty feet away from the house.

How Far Does a Septic Tank/Field Need to Be From a House?

When it comes to installing a septic tank or field, you must make sure that it is at least five feet away from your home’s foundation. In most circumstances, however, tanks are situated even further away from the house, often around 10 feet away in most cases, while leach fields are located approximately twenty feet away from the house. This is due to the fact that placing a septic tank too near to where the home will be built might cause construction to be delayed, and because constructing over a sewage tank can be hazardous.

The fact that the septic tank will be located further away from where the new house will be constructed will make the construction process much easier in the next months than it would be otherwise would alleviate many of these concerns for you.

However, if a septic tank is not blocked off but is instead constructed closer to the home than is customary, there should be no severe problems. It shouldn’t matter if the leach fields are far enough away and there isn’t anything constructed over them; your system should still function properly.

How Far Does a Septic Tank Have to Be From a Well?

When it comes to septic tank installation, there should be no other water sources nearby that might interfere with the process. As a result, if you have a well that is within sight of your home, you must make certain that the tank and the field are located a sufficient distance away from it. So, how far away does it have to be in order to be considered? This might vary depending on the situation, but there are certain general guidelines that you can follow. The health and safety standards in most states demand that any waste containers, including septic tanks, be at least fifty feet away from any wells in order to ensure public health and safety.

It is crucial to note, however, that this is a rule that may differ significantly depending on which state you reside in and how strict the regulations are.

That particular number will be the one you must follow if your state has a rule that dictates that you have the tank or fields at a greater distance from the house.

How Far Does a Septic Tank Need to Be From a Property Line?

A septic tank must be built in a location that is sufficiently remote from a property line before it can be used effectively. In order to guarantee that the tank is positioned at a sufficient distance from the property line, you must measure such that it is at least 10 feet away from the boundary. This is mostly due to the fact that the tank and drain fields should not be located in an area where a large number of people will be walking. If your neighbors come by and stroll about your property, they shouldn’t have to deal with the issue of something happening to the drain fields because they had to go to grab their dog or because they wanted to drop something off on your doorstep while they were there.

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If this occurs and the liquid escapes onto municipal property, you may be penalized for failing to keep the liquid a sufficient distance away from city property.

In most cases, you should keep your pets at least 10 feet away from the property border, but you should double-check with your state’s requirements as well.

Where Should a Septic Tank Be Placed?

Consider the surrounding area while considering whether or not to install a septic tank on your property. You should consider all of the available space. This location should be around 5-10 feet away from the home and property border, 50-100 feet away from a well, and it should be on level ground as well. According on the location of your home, it may be difficult to install a septic tank on your property. Because the soil surrounding the home is rocky or mixed with gravel, it is possible that finding a suitable location for the tank will be more difficult in this situation.

  • There are a number of other considerations that will influence where you may locate and build both the septic tank and drain fields.
  • As a result, if your house is constructed on a slope or steep hill where the earth is not as deep in some sections, the tank will not be able to be placed close by and will have to be positioned further away.
  • When you have a septic tank, you don’t want to have to worry about spilling, and flat soil is necessary to avoid this.
  • There is a lot to look for, especially when distance rules are taken into consideration, but you will most likely engage pros to perform the work for you, making the job much easier.

They will also be able to confirm that the distances between the locations are sufficient to comply with state standards.

How Much Land Is Needed for a Septic Tank?

Your property must have enough open space for the tank to be able to be installed safely and securely there. If the available area is insufficient, you may be unable to incorporate it into the soil. But how much property do you need to put a septic tank on in order to do so? The typical lot size required for the installation of a septic tank and field is around half an acre. This offers you the space you need to determine the best location for the tank itself as well as a location for the drain fields if needed.

This is something that you really do not want to have to deal with, therefore it is preferable to have the room in the first place in order to attempt and make the best of what you’ve been given.


Installing a new septic tank on your property is a major undertaking that must be completed correctly the first time. It is important to understand the project’s ins and outs, even if you have specialists complete the job on your behalf, so that you are certain that all state and federal rules are being followed. In order to avoid having any difficulties with your septic tank or drain fields in the future, and to avoid being fined or having to pay to have it fixed later on, you should take the following steps: As a result of the restrictions outlined in this article, you may construct your septic tank and drain field in accordance with state requirements, transforming your property into the ideal location for a home or transforming your existing home by constructing a system around it.

You may have your septic tank system installed and connected in a matter of hours, no matter how you go about doing it.

How close can a deck be to a septic tank?

Asked in the following category: General The most recent update was made on the 7th of February, 2020. – A slab foundation for a building such as a garage must be at least 10 feet away from the septic tank and 10 feet away from the leaching area. – The deck’s concrete columns must be at least 5 feet away from the leaching area and must not interfere with the septic system. In most cases, it is not a good idea to construct a deck near or on top of an aseptic tank. You will be required to maintain a minimum of a 5′ setback from an underground septic system under most zoning regulations.

  • Similarly, how much weight can you put on top of a septic tank before it collapses?
  • Simply put, how close can you build to a septic tank before it becomes a health hazard?
  • When building a garage or other slab foundation, the distance between the septic tank and leaching area must be 10 feet or more.
  • How far may drain field be from septic tank?* Yoursepticsystem site plan is normally created directly on top of your property survey, indicating the septic tank’s setbacks from the house and the tank’s location.

5-10 feet from the house, theleach fieldat least 20 feet from the house, at least 100 feet away from wells and streams, 25 feet away from dry gulches, and 10 feet away from the property

Can I Build Over A Septic Tank?

Perhaps you’d want to improve the outside living space of your house by adding a new patio or deck, or by expanding an existing structure. Building on or near a septic system, on the other hand, might cause major problems if you are using one. Continue reading to find out why it’s never a smart idea to construct a structure over a septic tank.

The Parts of a Septic System

Modern septic systems are comprised of a large pipe that connects your home to the tank, a septic tank, a drain field, and the soil around the drain field, among other components. First, the pipe transports waste water from your house to the septic tank, where it is treated to remove contaminants before being discharged into the drain field (or drain field). After being separated, wastewater contaminants are progressively absorbed by the soil around the treatment plant or treatment facility. The septic tank and drain field are the two most important features that should never be built on or around in any way.

Why You Can’t Build on Top of a Septic Tank

Because a septic tank requires regular maintenance and pumping, constructing a structure above it makes access more difficult. Septic personnel would be unable to do their duties if there was a structure on the roof. Additionally, any weight placed on top of a septic tank has the potential to cause harm to this critical component. Trapdoors or detachable boards installed on top of a septic tank to provide access are options considered by some homeowners, although most specialists advise against this solution.

Can I Build Over the Drain Field Instead?

The drain field, which is the area surrounding the septic tank that is intended to absorb water, is critical to the operation of your septic system. The same way that weight over the tank can cause harm, straining the drain field and surrounding soil can do the same. In this zone, even growing something other than short grass might have a negative impact on its ability to operate, as complicated root systems complicate the subsurface environment. The drain field must be accessible as well, since personnel must be able to reach and inspect it.

More significantly, these characteristics deal with waste, and if any of them fails to do their duties properly, you run the danger of unpleasant scents escaping into the surrounding air.

Please remember to call Palmetto Pumpers at 864-385-3933 to book an appointment if you reside in the Greenville or Anderson regions and require assistance with septic system installation, maintenance, or repair.

Can You Build Deck Over Septic Tank?

It is one of the most exciting and gratifying home remodeling tasks you can undertake to create an outside living space. A finished deck, no matter how complicated or basic, is a wonderful location to spend time with friends and family while also enjoying your house. What might put a kink in your deck-building plans, though, is the question of whether or not you can build a deck on top of a septic tank. Although it is possible to construct a deck over a septic tank, this does not automatically imply that it is a good idea.

Creating a deck over a septic tank requires careful planning and execution.

Read on to learn more. In this article, you’ll discover the fundamentals of installing decks over septic tanks, as well as the dangers and construction codes related with these projects, allowing you to determine whether or not this is a good idea for your home or not.

Can You Build a Deck Over a Septic Tank?

It is feasible to construct a deck over a septic tank, but it is not necessarily a smart idea. There are a variety of factors that should cause you to stop before deciding to build your deck over a septic tank. Building a deck without disrupting your septic system is a difficult task, and you will need to be resourceful. However, it is not impossible or difficult; it simply takes more preparation and adjustment. Consider it a one-of-a-kind design challenge that will push you to be more creative and strategic in your planning!

Risks of Building Over a Septic Tank

The construction of a deck directly over the tank will make it difficult, if not impossible, to pump out the tank. The tank’s upkeep is extremely vital, and covering the tank with a wood framework makes that task much more difficult to complete. Every three to five years, your septic tank should be drained and emptied, and older tanks may require more frequent maintenance. This makes it unwise to construct a deck over a septic tank unless you are forced to do so by circumstance. It is also critical to preserve the septic lines and drain field in their original condition.

  1. This liquid, which is referred to as effluent, drains out into the drain field and dissipates in the earth and the surrounding air.
  2. When something interferes with the process, however, it becomes readily apparent to the observer.
  3. Building a deck over a septic field is not recommended since it will impede the natural draining and dissipation of the effluent from occurring.
  4. The dispersing effluent can also cause the deck to deteriorate from the bottom up.

Guidelines for Building Decks Over Septic Tanks

Construction of a deck over a septic tank should be avoided wherever possible. If there is absolutely no other option, construct your deck as high as possible to provide yourself and service employees with plenty of space to work. Adding a trap door or hatch onto the deck directly will make pumping and emptying the tank much less of a headache in the long run. When designing your deck, make a note of the precise positions of your septic lines and drain field and mark them off with flags to ensure that you do not construct over them.

If your home is equipped with an old, empty, or decommissioned septic tank that is no longer in service, it is permissible to construct a deck over the tank, lines, and drain field.

Keep in mind that this is only permissible if the unused septic tank is entirely depleted and the drain field is completely dry and no longer distinguishable from the rest of the lawn.

Deck Over Septic Tank: Footings and Framing

If you want to build a deck over a septic tank, you should be aware that each deck footing must be at least 5-10 feet away from the septic tank at all times, depending on where you live in the world. However, doing so may result in the footings being too widely apart to allow for the construction of a structurally sound deck that complies with code. Decks that are too widely apart will droop, and they won’t survive more than a few of years if the footings are placed too far apart. If you discover that your deck layout necessitates the placement of footings that are too far apart, you might want to consider framing the deck with steel rather than wood.

How Big Is a Septic Tank?

Septic tanks are available in a variety of sizes depending on the size of the residence; for example, a two-bedroom ranch will have a significantly smaller tank than a six-bedroom country estate. The Environmental Protection Agency advises sizing the septic tank depending on the number of users and the size of the home, as well as the amount of water that will be used. The usual size of a septic tank is between 750 and 1250 gallons in capacity. This is enough to allow the tank to filter and treat a few years’ worth of water and waste before it has to be replaced.

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Tanks extend approximately one foot in each direction for every 250 gallons that the capacity required rises.

Septic tanks are generally made of precast concrete, plastic, fiberglass, or steel, with steel being the least popular due to the high cost and corrosion prone nature of steel tanks.

How Deep Are Septic Tanks Buried?

Contrary to popular opinion, septic tanks are not buried particularly deeply in the ground, as is commonly assumed. Septic tanks that are dug too deeply might be cracked or collapsed by soil weight, causing the effluent to leak and soak into the soil around the tank rather than draining into the drainage field. The majority of septic tanks are buried between 4 inches and 4 feet below ground level. This is dependent on the kind of soil, the slope of the yard, the tank design, and a variety of other factors.

This will assist you in avoiding the placement of deck footings in areas where they might cause harm.

Rules and Codes Regarding Septic Tanks

Before you begin construction on your deck, you should research the building rules in your area that pertain to septic tanks. Construction of a floating deck over an existing septic tank is permitted in some locations. In others, it is prohibited, and violating the law can result in penalties and the removal of the deck. Septic tanks, drain lines, and drain field must be positioned at least 10 feet away from building slabs, roadways, decks, and other buildings in some jurisdictions, such as Ohio.

You will never be permitted to build over septic lines or drain fields; these regulations are only applicable to construction near tanks.

These requirements apply not just to decks, but also to other types of construction, such as walls and trees, foundations, slabs, and other types of landscaping.

It is not permissible to construct structures near or on top of the tank, lines, or drainage field if these limitations apply in your location.

How Close Can a Deck Be to a Septic Tank?

If possible, the footings of the deck should be at least 5-10 feet away from the tank at all times, depending on where you reside. This might result in the deck’s size being reduced or increased in order to fit these regulations. You may use this site to gather information on septic systems at the state level. Consult your local building codes or chat with a professional plumbing contractor or house inspector to have a better understanding! If your municipality permits footings closer than 5 feet to the tank, it is still advisable to maintain the deck footings at least five feet away from the tank.

Can You Build a Floating Deck Over a Septic Tank?

The construction of floating decks, which are essentially free-standing wooden platforms that are placed at or slightly above grade, should not take place over an existing septic tank. The weight of the deck on the supports might cause the septic system’s ability to properly process and drain waste to become displaced and disrupted. It is possible that you may become the proud owner of the stinkiest floating deck in the city if you ignore this warning. Construction of a hybrid floating deck, which uses underground footings similar to that of a traditional deck while remaining short and distinct from the home, is a straightforward option.

Can You Build a Deck Over a Septic Field?

It is never recommended to construct a deck over a septic field. In order for sewage to flow out into the groundwater or evaporate into the air, septic fields must be built to allow for this. When you disturb the septic field, it causes backup, which causes the ground to become murky with tainted wastewater. The stink and look will be quite visible, and it is possible that the entire septic system will need to be repaired. Even if you are planning to construct on top of an existing septic field, you should properly evaluate the soil to ensure that it is no longer dripping with water.

What Can You Put Over a Septic Tank?

Septic tanks cannot be immediately overtopped except for decks or pergolas that are built on footings more than five feet away from the tank’s inlet and outlet. In addition to septic system components such as concrete slabs, foundations, and shrubs, other constructions can have a negative impact on the system’s health and performance.


It might be difficult to construct a deck over a septic tank. It is feasible, but it is not always a sensible decision. Even if you decide to create the deck, there are a number of considerations to bear in mind. Before you begin construction on a deck over a septic tank, conduct thorough study and planning, and always keep the septic system in mind. Have you ever constructed a structure over a septic tank? Do you have any further questions concerning your forthcoming deck project? Please let us know.

Feel free to share your ideas in the comments area below. Eugene has been a DIY fanatic for the most of his life, and he enjoys being creative while also motivating others to be creative. He has a strong desire to learn about house remodeling, renovation, and carpentry from the ground up.

What size of septic tank do I need?

Probably one of the last things on your mind when you are constructing a new house is the location of your septic system. After all, shopping for tanks isn’t nearly as entertaining as shopping for cabinetry, appliances, and floor coverings. Although you would never brag about it, your guests will be aware if you do not have the proper septic tank placed in your home or business.

septic tanks for new home construction

The exact size of the septic tank is determined mostly by the square footage of the house and the number of people who will be living in it. The majority of home septic tanks have capacities ranging from 750 to 1,250 gallons. A 1000 gallon tank will most likely be required for a typical 3-bedroom home that is smaller than 2500 square feet in size. Of course, all of this is dependent on the number of people who live in the house as well as the amount of water and waste that will be disposed of through the plumbing system.

For the most accurate assessment of your septic tank needs, you should speak with an experienced and trustworthy sewer business representative.

planning your drainfield

Here are some helpful hints for deciding where to locate your drainfield when you’re designing it.

  • Vehicles should not be allowed on or around the drainfield. Planting trees or anything else with deep roots along the bed of the drain field is not recommended. The roots jam the pipes on a regular basis. Downspouts and sump pumps should not be discharged into the septic system. Do not tamper with or change natural drainage features without first researching and evaluating the consequences of your actions on the drainage field. Do not construct extensions on top of the drain field or cover it with concrete, asphalt, or other materials. Create easy access to your septic tank cover by placing it near the entrance. Easy maintenance and inspection are made possible as a result. To aid with evaporation and erosion prevention, plant grass in the area.

a home addition may mean a new septic tank

Do not make any big additions or renovations to your house or company until you have had the size of your septic system assessed. If you want to build a house addition that is more than 10% of your total floor space, increases the number of rooms, or necessitates the installation of new plumbing, you will almost certainly need to expand your septic tank.

  • For a home addition that will result in increased use of your septic system, your local health department will require a letter from you that has been signed and authorized by a representative of your local health department confirming that your new septic system is capable of accommodating the increase in wastewater. It is not recommended that you replace your septic system without the assistance of a certified and competent contractor.

how to maintain your new septic system

Septic tank cleaning and septic tank pumping services are provided by Norway Septic Inc., a service-oriented company devoted to delivering outstanding septic tank cleaning and septic tank pumping services to households and business owners throughout the Michiana area. “We take great delight in finishing the task that others have left unfinished.” “They pump, we clean!” says our company’s motto. Septic systems are something we are familiar with from our 40 years of expertise, and we propose the following:

  • Make use of the services of a qualified specialist to develop a maintenance strategy. Make an appointment for an annual examination of your septic system. Utilize the services of an effluent filter to limit the amount of particles that exit the tank, so extending the life of your septic system. Waste items should be disposed of properly, and energy-efficient appliances should be used. Make sure you get your septic system professionally cleaned every 2 to 3 years, or more frequently if necessary, by an experienced and qualified expert
  • If you have any reason to believe that there is an issue with your system, contact a professional. It is far preferable to catch anything early than than pay the price later. Maintain a record of all septic system repairs, inspections, and other activities

common septic questions

Here are some of the most frequently asked questions by our septic customers.

How do I determine the size of my septic tank?

If you have a rectangular tank, multiply the inner height by the length to get the overall height of the tank. In order to find out how many gallons your septic tank contains, divide the number by.1337.1337

How many bedrooms does a 500-gallon septic tank support?

The exact size of the septic tank is determined mostly by the square footage of the house and the number of people who will be living in it. The majority of home septic tanks have capacities ranging from 750 to 1,250 gallons. A 1000 gallon tank will most likely be required for a typical 3-bedroom home that is smaller than 2500 square feet in size.

How deep in the ground is a septic tank?

Your septic system is normally buried between four inches and four feet underground, depending on the climate.

Can You Build Over a Septic System? – Sewer Solutions

If your septic tank is located underground on your land, you may be wondering if you may build on top of or near it when constructing a new construction or extending an existing one on your property. There are, however, a number of drawbacks to taking this route. A prominent plumbing installation firm in Hilo, HI, gives some information on what occurs when you build over an existing septic system in this article.

What Are the Parts of a Septic System?

The four basic components of a conventional septic system are the pipe leading from your home, the septic tanks that hold the waste water, a drain field or leach field, and the soil around the leach field. The pipe transports wastewater from your plumbing installation to the septic tank, where it is treated before being discharged into the leach field (or leach field). Contaminants are removed from the wastewater, which is then gently released into the soil as a result of the process. The septic tank and the leach field are the only two of these four components that should be avoided at all costs when designing a new house building or extension.

Why Should You Avoid Building on Top of Them?

Pumping and repair of the septic tank are required on a regular basis, and access to the tank is required. If you construct a structure on top of it, the sewer pumping staff may be unable to do their duties correctly. One option is to build detachable boards or trap doors to provide access to the septic tank while still allowing for drainage. The leach field, on the other hand, processes the wastewater from the septic tank by using the soil surrounding it. Building on top of it will drastically impair its ability to perform its purpose.

Get in contact with Sewer Solutions if you want professional septic or plumbing installation services.

They also offer a variety of plumbing services, including grease trap cleaning, septic tank pumping, and other related tasks.

You can learn more about their plumbing installation services by visiting theirwebsite, and you can read testimonials from prior customers on their Yelp page.

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