Building A Deck Over A Drain Field

If you have a septic system and want to add a deck to your house or build a shed in your backyard you should consider the consequences carefully.

Building a deck over a drain field.

Because of the moisture levels and the need for free air movement no permanent structures. Most zoning ordinances will require that you maintain at least a 5 setback from an underground septic system. Usually decks are allowed over drainfields as long as the piers of the deck are at least two feet from the drainfield trenches and as long as the deck footings do not support a roof. The biggest issue that can arise from construction near a drain field is the damage caused by heavy construction equipment.

However if a permanent structure is built over a drainfield it can restrict the oxygen flow into the soil and restrict the evapotranspiration process. Can you build a deck over a septic field. If you have a deck or patio with no access to the tank you may have to rip out the structure wasting all the money spent to build it. A big risk to building over the drainfield is causing the lines to collapse.

Building a permanent structure over the tank or drain field is usually a bad idea. Building over field lines. The lack of regular pumping of your tank will be a costly mistake which can also affect you again when you sell. You may run into expensive problems a few years down the road.

Building a deck over a septic tank it is usually not a good idea to build a deck near or on top of a septic tank. Building near a drain field leach field if a drain field is damaged it can cost a lot more to replace. If constructing over field lines it is imperative that no foundation is dug.