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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...
"Loft conversion" - WD19, job posted 07/05/26
AVENUE BUILDERS
AVENUE BUILDERS is an established extension buildering business in WD23. We come highly recommended and provide competitive quotes for your work.
"Side return extension" - WD18, job posted 09/10/25
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 ...
"I am looking for quotes for a small rear extension on a terraced property in WD18, Watford. The extension will be built directly behind the existing kitchen and will house a toilet, stand-up shower, and a small hand basin. Existing Details: Existing Kitchen Width (internal): 2.01 metres ..." - WD18, job posted 07/08/25
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 ...
"I am looking for quotes for a small rear extension on a terraced property in WD18, Watford. The extension will be built directly behind the existing kitchen and will house a toilet, stand-up shower, and a small hand basin. Existing Details: Property Type: Mid-terrace house Location: WD18,..." - WATFORD, job posted 07/08/25
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...
"Single storey extension" - WATFORD, job posted 26/05/25
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.
"Loft conversion" - WD17, job posted 27/12/24
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...
"Two storey extension" - WATFORD, job posted 16/12/24
£47/hr
£295/day
MJR Construction Ltd
MJR Construction is based in North London/Hertfordshire. We offer friendly and professional building services.Our highly experienced team speci...
"Side return extension" - WD17, job posted 05/03/24
£41/hr
£258/day
Active Property Solutions
Greater London, WD23
We specialize in project management, extensions, loft conversions and building renovation works. We ensure the contracts that we undertake are mana...
£47/hr
£297/day
Active Property Solutions
Need to find an Extension Builder near you for all your extension buildering work?
Active Property Solutions provides a local, trusted exte...
£40/hr
£253/day
Cannon Build Solutions
Cannon Build Solutions is an established extension buildering business in WD23. We come highly recommended and provide competitive quotes for your ...
£45/hr
£285/day
Architectural Brickwork Services
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
£46/hr
£288/day
Ideal Place Construction Ltd
Trusted and professional extension builder in WD23. Experienced in all extension buildering work and keeping within budget and on quote. Ideal Plac...
£43/hr
£268/day
Primrose Projects
Primrose Projects is an established and experienced local extension builder in WD23. Please contact us for a free, no obligation quote and competit...
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Use these steps to find Extension Builders in WD23 for FREE!
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- Enter your details: We’ll match you with Extension Builders in WD23. We’ll notify you via text or email when an Extension Builder is available to quote.
- Select your Extension Builder: Compare Extension Builders interested in working with you. You can use HaMuch to safely message local WD23 Extension Builders or phone them directly - you’re in control!
Local Extension Builders in London Boroughs
Job estimates from extension builders near you
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.
Build a timber frame extension - £26,440
Garden office - £10,440
Granny annexe - £87,440
Build a flat roof extension - £22,440
Convert a Garage - £16,440
Hip to gable loft conversion - £42,440
Convert a bungalow loft - £29,440
Build a dormer loft conversion - £42,440
Build a swimming pool - £81,440
Build a Mansard loft conversion - £52,440
Concrete foundations - £6,690
Underpin a building - £17,940
Two storey extension - £88,660
Convert a basement - £42,450
Side return extension - £46,450
Loft conversion - £37,875
Garage - £18,940
Single storey extension - £63,800
Outbuilding - £10,440
Install an RSJ - £2,640
Build a kitchen extension - £42,440
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