Shared sewer through basement

[AntonyJ]

It must be common having to route services through the basement when building office blocks etc in cities, but I assume less so in domestic situations.

We have a shared sewer running through our plot (4 properties are upstream). The current house we're demolishing has an extension built over this. I'm exploring adding a basement to our rebuild (we have planning permission for the above-ground rebuild).

Re-routing the pipe around the build would be too big a detour to work with the falls I think. 

Had anyone come across this situation and how was it dealt with? Is it a complete no, or are there solutions, e.g. build a culvert/tunnel around it or seal inside a duct so it stays "outside" the building?

[DevilDamo]

You’d have no choice but to divert it. Wouldn’t appear to be a significant additional cost when already taking into the account the cost for the re-development works.

[Conor]

It's down to the water company, it's their pipe. It's definitely a non -standard scenario, and hard to know until you engage with them and present your chosen solution. I've a feeling any kind of sewer in a habitable space will be a no. As above, a diversion is by far the best solution.

[scottishjohn]

On 10/10/2024 at 15:02, AntonyJ said:

e.g. build a culvert/tunnel around it or seal inside a duct so it stays "outside" the building?

and if it ever needs maintainence?

  no divert it aorund house

 

 although I would expect the water board will want to do it,and have rights to dig it up for maintaince if required

[JohnMo]

Spending several £100 thousand building a house, and you would actually want someone else body waste gong through you cellar or even under your house, when it is all finished. Perhaps you need to step back and have a think about it.

[AntonyJ]

Thanks for your replies. I contacted Anglian Water. They said that even without the basement they would require a diversion and not allow building over as we're demolishing and rebuilding rather than extending. They don't allow build overs on new houses....

The main reason I was looking at keeping the pipe where it is was too avoid having to reduce the footprint of the house to make room for the drain to be diverted around the boundary.

So, can anyone recommend a good drainage engineer that covers Essex?

Thanks