Rear and side extensions, structural openings and the groundworks under them — foundations, steels, blockwork and drainage, done in the right order.
Everything an extension does badly, it does underground first. Foundations that are too shallow for the soil, drainage that is not diverted properly, a damp-proof course bridged at the junction with the existing wall — none of it is visible once the floor goes down, and all of it is ruinous to put right afterwards.
A free visit to see the job properly. No call-out charge.
An itemised price, agreed before anything starts.
Same faces on site, dust sheets down, tidied daily.
We walk it through with you and put right anything you flag.
Common Questions
Many single-storey rear extensions fall under permitted development, subject to depth, height and boundary limits, and to your property not being a flat, listed or in a conservation area. Building regulations approval is always required regardless of planning. We check which route applies before quoting.
If you are excavating near a shared boundary, building on the line of junction, or cutting into a party wall for steels, you must serve notice on the affected neighbours, usually two months in advance. It is a legal requirement separate from planning. We flag it early because the notice period sits on the critical path.
It depends on the soil, on nearby trees and on what building control require for your area — London clay near mature trees can push foundations considerably deeper than the standard minimum. The depth is confirmed by inspection once the trench is open, which is why an honest quote allows for it rather than pretending it is fixed.
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Free quote, no call-out charge, and an honest answer about what your job actually needs.
