Lower in Flooring in Attached Garage Conversion If you want to know how your DIY projects could be affected by building and planning regulations, click here to post questions and view answers

[110sb]

I am wanting to convert my attached single story garage into a utility space and an office space.

In the utility space I want to put a shower but would have very little headroom once I've damp proofed and insulated the current floor. The floor is typical concrete slab. Can anyone advise if I would be able to excavate the floor in the proposed utility space then create a floating floor at depth lower than current slab? What would be needed to get it passed by building control?

Thank you in advance.

[stoneyboy]

Hi 110sb
With luck you will be able to dig down to the depth of the existing house foundations, form a new sub floor and build retaining walls as required before forming a new suspended floor.
It’s a matter of doing some exploratory digging and then agreeing with the BI how to proceed. Suggest you do this using the building notice route.
Regards S

[110sb]

Thank you for the reply.