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Sharp Building Ltd
Sharp Building Ltd is an established and experienced local extension builder in WD23. Please contact us for a free, no obligation quote and competi...
AVENUE BUILDERS
AVENUE BUILDERS is an established extension buildering business in WD23. We come highly recommended and provide competitive quotes for your work.
C S C BUILDINGS LTD
Relax... you have found a reliable extension builder in WD23. C S C BUILDINGS LTD is a friendly and reliable company based in WD23 who consider no ...
Frame Brickwork
Relax... you have found a reliable extension builder in WD23. Frame Brickwork is a friendly and reliable company based in WD23 who consider no job ...
1st Choice Builders UK
Experienced extension builder ready to quote for your work. 1st Choice Builders UK is the best extension builder in WD23. No obligation free quotes...
T N Roofing
T N Roofing is an established extension buildering business in WD23. We come highly recommended and provide competitive quotes for your work.
Design & Build Builders Ltd
Trusted and professional extension builder in WD23. Experienced in all extension buildering work and keeping within budget and on quote. Design & B...
From £37,125
MJR Construction Ltd
MJR Construction is based in North London/Hertfordshire. We offer friendly and professional building services.Our highly experienced team speci...
From £37,275
Active Property Solutions
Greater London, WD23
Need to find an Extension Builder near you for all your extension buildering work?
Active Property Solutions provides a local, trusted exte...
From £34,350
Active Property Solutions
We specialize in project management, extensions, loft conversions and building renovation works. We ensure the contracts that we undertake are mana...
Cheapest builders for loft conversion in WD23
Comparing extension builders estimates for Loft conversion 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 of a loft conversion in WD23 by posting your job to extension builders in WD23.
"Loft conversion" - WD19, job posted 05/07/26
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Estimates for common extension builder jobs in WD23;
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 - £18,038
Two storey extension - £88,806
Build a timber frame extension - £26,538
Build a swimming pool - £81,538
Single storey extension - £65,752
Side return extension - £47,548
Install an RSJ - £2,738
Outbuilding - £10,538
Build a Mansard loft conversion - £52,538
Loft conversion - £38,790
Build a kitchen extension - £42,538
Hip to gable loft conversion - £42,538
Granny annexe - £87,538
Garden office - £10,538
Convert a Garage - £16,538
Garage - £19,038
Build a flat roof extension - £22,538
Build a dormer loft conversion - £42,538
Concrete foundations - £6,788
Convert a bungalow loft - £29,538
Convert a basement - £43,548