Extension on top of sewer?

Question

What needs to be taken into account when having an extension constructed near or atop a sewer?

Lewis · Accepted Answer

Hello the sewer will have to either be moved to suit or will have to be raised to the finished floor level so it can be accessed and maintained within the property regards acl groundwork’s

Chris · Answer

Firstly you have to be a foot deeper than invert level you can build upt to height with either bricks or plastic risers depending what it’s built out of

bazza · Answer

A manhole cannot be inside the dwelling  and footings dug well below at side of sewer. Severn Trent in our area would request a plan for permission and work method of how you are going to protect the sewer .build over is a no no

Anthony · Answer

Re-routing your drainage system because of foul smells from a sewer it’s quite straight forward, should include this on the plans of the extension!

Tom · Answer

You need to comply with building regs and get them to inspect and approve any work done. Also, the sewerage utility will need to be informed in writing.
Thanks,
Tom's Team Ltd.

Daniel · Answer

The sewer pipes or the sewer lid would have to be moved out before the footings and extension can be done but that can cost a bit extra to do so but new pipework would have to replaced and new put in and make sure they put pea shingle in before a ballast mix can be poured to bring up to the existing level of the old floor.

Extension on top of sewer?

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