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QA's Pointing Brick Repair
Relax... you have found a reliable extension builder in Chelsea. QA's Pointing and Brick Repair is a friendly and reliable company based in Chelsea...
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 Chelsea. M & A UK Ltd is a friendly and reliable company based in Chelsea who consider no j...
Need to find an Extension Builder near you for all your extension buildering work?
AJ Wells provides a local, trusted extension buildering ...
Newpark Construction are here to help customers who need an Extension Builder in Chelsea. We offer a competitive rate to complete all your extensio...
Jay Reid
Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in Chelsea. No obligation fre...
CK Constructions & Development Ltd is a trusted extension builder serving customers in Chelsea and the surrounding area. Contact us to today to get...
London Construction is an established and experienced local extension builder in Chelsea. Please contact us for a free, no obligation quote and com...
A to Z Builders Ltd are here to help customers who need an Extension Builder in Chelsea. We offer a competitive rate to complete all your extension...

Comparing extension builders estimates for a Convert a basement gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost to convert a basement in Chelsea by posting a job with HaMuch and we will send it to extension builders in Chelsea.
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 - £17,986

Two storey extension - £88,728

Build a timber frame extension - £26,486

Build a swimming pool - £81,486

Single storey extension - £64,712

Side return extension - £46,963

Install an RSJ - £2,686

Outbuilding - £10,486

Build a Mansard loft conversion - £52,486

Loft conversion - £38,303

Build a kitchen extension - £42,486

Hip to gable loft conversion - £42,486

Granny annexe - £87,486

Garden office - £10,486

Convert a Garage - £16,486

Garage - £18,986

Build a flat roof extension - £22,486

Build a dormer loft conversion - £42,486

Concrete foundations - £6,736

Convert a bungalow loft - £29,486

Convert a basement - £42,963