From £6,410
GB Buildings & Renovations is an established extension buildering business in Hammersmith. We come highly recommended and provide competitive quote...
From £6,490
Greater London, W6
Relax... you have found a reliable extension builder in Hammersmith. Lux Construction is a friendly and reliable company based in Hammersmith who c...
From £6,466
New Line Construction Ltd are a family-run business with eighteen years’ experience and have been helping customers in London and the surrounding...
From £6,634
Greater London, W6
Trusted and professional extension builder in Hammersmith. Experienced in all extension buildering work and keeping within budget and on quote. Jon...
From £6,642
Darlo Ltd has over 20 years of constructing, refurbishing and transforming buildings for home-owners and commercial clients. We offer a one stop so...
From £6,114
Relax... you have found a reliable extension builder in Hammersmith. Add Global is a friendly and reliable company based in Hammersmith who conside...
From £6,346
The Great Wolf Construction are here to help customers who need an Extension Builder in Hammersmith. We offer a competitive rate to complete all yo...
From £6,418
Newpark Construction are here to help customers who need an Extension Builder in Hammersmith. We offer a competitive rate to complete all your exte...
From £6,650
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,586
When it comes to an expert house renovation and professional house refurbishment work in London, the company to trust with your project is Knight R...

Concrete foundations range from the £6,114 (Add Global based in W12) to £6,650 (Specialist Screeding based in W6) in Hammersmith.
Comparing extension builders estimates for laying concrete foundations gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Find out the exact cost of laying concrete foundations in Hammersmith by posting a job with HaMuch. We will send it to extension builders who can give you a detailed quote.
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,726

Two storey extension - £88,338

Build a timber frame extension - £26,226

Build a swimming pool - £81,226

Single storey extension - £59,512

Side return extension - £44,038

Install an RSJ - £2,426

Outbuilding - £10,226

Build a Mansard loft conversion - £52,226

Loft conversion - £35,865

Build a kitchen extension - £42,226

Hip to gable loft conversion - £42,226

Granny annexe - £87,226

Garden office - £10,226

Convert a Garage - £16,226

Garage - £18,726

Build a flat roof extension - £22,226

Build a dormer loft conversion - £42,226

Concrete foundations - £6,476

Convert a bungalow loft - £29,226

Convert a basement - £40,038