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Andy Harris
Andy Harris Construction is an established and experienced local extension builder in W4. Please contact us for a free, no obligation quote and com...
Vas Constructs
RUBBERCOVER™ EPDM Permaroof rubber cover and roof system. Lead flashing. NCTS. Timber Frame Buildings. Refurbish fit out, structural ...
AG-Renovation Ltd is a trusted extension builder serving customers in W4 and the surrounding area. Contact us to today to get a competitive quote f...
Newpark Construction are here to help customers who need an Extension Builder in W4. We offer a competitive rate to complete all your extension bui...
At Ferdas Design & Build Ltd we have been fitting bespoke bathrooms since 2013. We pride ourselves on being the go-to bathroom fitters for discerni...
Tomasz Pedowicz
Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...
Mick Shehabi
London, W4
Vision Refurbishments Ltd. brings over 10 years of experience in building and construction, including interior and exterior renovations, painting, ...
Experienced extension builder ready to quote for your work. HUGHES BUILDERS is the best extension builder in W4. No obligation free quotes and many...
Chiswick, W4
R Burton & Sons Builders are here to help customers who need an Extension Builder in W4. We offer a competitive rate to complete all your extension...
Need to find an Extension Builder near you for all your extension buildering work?
Heaven Sent Construction provides a local, trusted exten...

Concrete foundations range from the £6,274 (HUGHES BUILDERS based in W12) to £8,090 (1st & 2nd Fix Vasconstruct based in W12) in W4.
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 W4 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 - £17,902

Two storey extension - £88,602

Build a timber frame extension - £26,402

Build a swimming pool - £81,402

Single storey extension - £63,032

Side return extension - £46,018

Install an RSJ - £2,602

Outbuilding - £10,402

Build a Mansard loft conversion - £52,402

Loft conversion - £37,515

Build a kitchen extension - £42,402

Hip to gable loft conversion - £42,402

Granny annexe - £87,402

Garden office - £10,402

Convert a Garage - £16,402

Garage - £18,902

Build a flat roof extension - £22,402

Build a dormer loft conversion - £42,402

Concrete foundations - £6,652

Convert a bungalow loft - £29,402

Convert a basement - £42,018