What do I need to know before building a retaining wall in my backyard?

Mark,
I am looking to build a retaining wall so that I can level off my slanted backyard in order to create a play area for the kids.  A concern is that the septic system drain pipe goes through the area that I intend to work with.  Are there certain guidelines, other than don’t bust the pipe, to the depth the pipe can be buried if I am going to bring in additional fill?  What are the best materials to use for the wall; green products, visually pleasing, ease of installation?

Jim

_______________

We contact Ed Del Grande, Master Plumber and HGTVpro expert for his help with your question.

First, this job requires a permit, whether you’re doing it yourself or having a contractor do it.

Second, as for the specific codes or requirements requested by the questioner, the answer isn’t really that exact because there are so many variables—type of drainage pipe, soil conditions, amount of fill to be brought in, among others. The good news is that your town should have copies of the septic system plans on file so you can access them for permitting purposes.

So what does the homeowner need to do? The homeowner needs to get a qualified engineer to certify that the project can move forward or if there is anything else to support the drainage pipe that needs to be done.

How does the homeowner find a qualified engineer? Call the company that pumps out the tank. They’re the best place to start.

Generally speaking, you’ll probably be able to go ahead without too much trouble. But, if you can’t it is waaaaay better to know now than after a septic system failure—which can cost thousands. As Ed puts it: You can take the chance, but why would you?

Hope this helps! Let us know how the kids enjoy the yard.