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Select your affordable SW9 extension builder
Experienced extension builder ready to quote for your work. The Perfectionist is the best extension builder in SW9. No obligation free quotes and m...
Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in SW9. No obligation free qu...
A to Z Builders Ltd are here to help customers who need an Extension Builder in SW9. We offer a competitive rate to complete all your extension bui...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in SW9. No obligation free quot...
Trusted and professional extension builder in SW9. Experienced in all extension buildering work and keeping within budget and on quote. Vidanov Bui...
DUWIX BUILDING MAINTENANCE are here to help customers who need an Extension Builder in SW9. We offer a competitive rate to complete all your extens...
Peter Cesma
Experienced builder in all aspects of building works. All work guaranteed. Quality finish, promt ,honest and reliable services. Public liabil...
F & F Building Services is an established extension buildering business in SW9. We come highly recommended and provide competitive quotes for your ...
R C BUILDER is a trusted extension builder serving customers in SW9 and the surrounding area. Contact us to today to get a competitive quote for ex...
Quality Carpentry is a trusted extension builder serving customers in SW9 and the surrounding area. Contact us to today to get a competitive quote ...

Outbuilding costs in SW9 range from the cheapest of £9,976 (A to Z Builders Ltd based in SW1P) to the dearest of £10,320 (D & G Building & Decorating based in SW8), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in SW9 by posting a job with HaMuch and we will send it to extension builders.
| Borough in London |
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| Outbuilding in Stockwell |
| Outbuilding in Nine Elms |
| Outbuilding in Camberwell |
| Outbuilding in Clapham |
| Outbuilding in Herne Hill |
| Outbuilding in Lambeth |
| Outbuilding in Brixton |
| Outbuilding in Elephant & Castle |
| Outbuilding in Pimlico |
| Outbuilding in Houses of Parliament |
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 - £17,651

Two storey extension - £88,227

Build a timber frame extension - £26,151

Build a swimming pool - £81,151

Single storey extension - £58,024

Side return extension - £43,201

Install an RSJ - £2,351

Outbuilding - £10,151

Build a Mansard loft conversion - £52,151

Loft conversion - £35,168

Build a kitchen extension - £42,151

Hip to gable loft conversion - £42,151

Granny annexe - £87,151

Garden office - £10,151

Convert a Garage - £16,151

Garage - £18,651

Build a flat roof extension - £22,151

Build a dormer loft conversion - £42,151

Concrete foundations - £6,401

Convert a bungalow loft - £29,151

Convert a basement - £39,201