Hi,
It looks like the semi-detached house I am purchasing has a drain running at the rear where I propose to build an extension. The property itself has no manholes or visible sewer but I can see that the two adjoining properties have manholes and I assume that a lateral foul drain runs between them in a straight line.
I have attached a diagram below showing the proposed property which I am extending to the rear and side (single floor). The red line shows the approximate position of the drain and manholes.
Given that my rear extension wall will go over the pipe, what options do I have? I have heard about "reinforced concrete floor slab", "cantilever" and "pad foundations and beams" but have no idea what there are and how much more than a standard foundation they would cost.
As I have not exchanged yet, I have no idea of the details of the drain - how big, how deep etc? Also is moving the drain a cheaper option if possible?
Is my extension a non-starter???
Any advice will be greatly appreciated..... especially as I am exchanging in two weeks
View media item 45232
Regards,
T George[/img]
It looks like the semi-detached house I am purchasing has a drain running at the rear where I propose to build an extension. The property itself has no manholes or visible sewer but I can see that the two adjoining properties have manholes and I assume that a lateral foul drain runs between them in a straight line.
I have attached a diagram below showing the proposed property which I am extending to the rear and side (single floor). The red line shows the approximate position of the drain and manholes.
Given that my rear extension wall will go over the pipe, what options do I have? I have heard about "reinforced concrete floor slab", "cantilever" and "pad foundations and beams" but have no idea what there are and how much more than a standard foundation they would cost.
As I have not exchanged yet, I have no idea of the details of the drain - how big, how deep etc? Also is moving the drain a cheaper option if possible?
Is my extension a non-starter???
Any advice will be greatly appreciated..... especially as I am exchanging in two weeks
View media item 45232
Regards,
T George[/img]