Raft foundation - close to existing structures

[WisteriaMews]

Does anyone know with a raft foundation how close you can get to existing structures?

 

We have an existing sewer connection on our site with a manhole that drops about 4m and then runs to the boundary and main sewer. The constraints of the site mean we will need to get as close to it as we can. (The quotes for moving the sewer connection have been high.)

 

Separately we gave a brick boundary wall that will be the rain screen for the ground floor of our build. To avoid the expense of a demolish and rebuild could the raft get close enough to avoid this?

 

Grateful for anyone's experience!

[mjc55]

i think that you would need to ask whoever designed your foundation.

[WisteriaMews]

We're currently at the planning stage so don't have a foundation designer / structural engineer on board yet. I appreciate these will be the people that need to give a definitive answer but I was wondering if anyone on the forum and done similar and could share their experience.