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London Construction
London Construction is an established and experienced local extension builder in Chelsea. Please contact us for a free, no obligation quote and com...
QA's Pointing and Brick Repair
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 Maintenance Ltd
Red Box are a Fulham-based building and decorating business who work in West and Southwest London, and who specialise in fine interior renovations,...
M & A UK Ltd
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...
AJ Wells
Need to find an Extension Builder near you for all your extension buildering work?
AJ Wells provides a local, trusted extension buildering ...
Newpark Construction
Newpark Construction are here to help customers who need an Extension Builder in Chelsea. We offer a competitive rate to complete all your extensio...
Reid and Co Developments Ltd
Jay Reid
D & G Building & Decorating
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
CK Constructions & Development Ltd is a trusted extension builder serving customers in Chelsea and the surrounding area. Contact us to today to get...
A to Z Builders Ltd
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...
Extension builder estimates (based on hourly rates) to build a single storey extension in Chelsea
- How much does a single storey extension cost?
- Single storey extension cost calculator
- What size single storey extension can I build without planning permission?
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- How deep do foundations need to be for a single storey extension?
- Is it cheaper to have an extension or a conservatory?
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Estimates for common extension builder jobs 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