New space under your existing home
In most of London the easiest place to add serious floor area is straight down. A basement excavation in London creates a completely new level under your house — without losing garden space and, in many cases, within permitted development or with a straightforward planning consent.
We handle the full excavation sequence: breaking out floors, digging out in a strict pin-by-pin sequence, temporary propping, forming the new reinforced concrete box and connecting the drainage. Our teams work in confined London sites every week — restricted access, party walls on both sides and neighbours close by are our normal working conditions, not a complication.
What the service covers
- Site set-up, protection and neighbour liaison
- Breaking out existing floors and hand or machine dig
- Sequenced excavation with temporary works and propping
- Reinforced concrete underpinning and box structure
- Muck-away, skips and licensed disposal
- New drainage runs, sumps and pump chambers
- Ready for waterproofing and fit-out stages
Working alongside your engineer
Every dig is carried out to a structural engineer’s design and sequence. We work with your appointed engineer or can recommend engineers we regularly deliver basement projects with. Method statements, sequencing drawings and building control sign-offs are part of the package.
Why IG Building
We are basement specialists, not general builders who occasionally dig. If you’re comparing basement excavation contractors in London, look at what they’ve actually dug: our recent projects include a double-storey basement in Earl’s Court, full basement dig-outs in Fulham and Chiswick and structural basement works across west and north London. See our completed basement projects or request a free site visit.