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London Construction is an established and experienced local extension builder in West Kensington. Please contact us for a free, no obligation quote...
Vas Constructs
RUBBERCOVER™ EPDM Permaroof rubber cover and roof system. Lead flashing. NCTS. Timber Frame Buildings. Refurbish fit out, structural ...
QA's Pointing Brick Repair
Relax... you have found a reliable extension builder in West Kensington. QA's Pointing and Brick Repair is a friendly and reliable company based in...
Building Vision London Ltd is a trusted extension builder serving customers in West Kensington and the surrounding area. Contact us to today to get...
Red Box are a Fulham-based building and decorating business who work in West and Southwest London, and who specialise in fine interior renovations,...
Relax... you have found a reliable extension builder in West Kensington. M & A UK Ltd is a friendly and reliable company based in West Kensington w...
Need to find an Extension Builder near you for all your extension buildering work?
AJ Wells provides a local, trusted extension buildering ...
Jonathan Rimmer
Experienced extension builder ready to quote for your work. Mr is the best extension builder in West Kensington. No obligation free quotes and many...
Newpark Construction are here to help customers who need an Extension Builder in West Kensington. We offer a competitive rate to complete all your ...
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...

A flat roof extension ranges from the cheapest of £22,096 (Mr based in NW10) to the dearest of £23,840 (1st & 2nd Fix Vasconstruct based in W12), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in West Kensington by posting a job with HaMuch. We'll send it to extension builders in West Kensington.
"Flat roof extension for a period mews terraced house. We'd like a bedroom extension with full bathroom and a roof top terrace. Footprint is roughly 8.5m x 6m." - W6, job posted 10/06/24
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 - £17,951

Two storey extension - £88,677

Build a timber frame extension - £26,451

Build a swimming pool - £81,451

Single storey extension - £64,024

Side return extension - £46,576

Install an RSJ - £2,651

Outbuilding - £10,451

Build a Mansard loft conversion - £52,451

Loft conversion - £37,980

Build a kitchen extension - £42,451

Hip to gable loft conversion - £42,451

Granny annexe - £87,451

Garden office - £10,451

Convert a Garage - £16,451

Garage - £18,951

Build a flat roof extension - £22,451

Build a dormer loft conversion - £42,451

Concrete foundations - £6,701

Convert a bungalow loft - £29,451

Convert a basement - £42,576