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JJSR Construction Ltd
J Wijayamohan
JJSR Construction Ltd is an established and experienced local extension builder in HA3. Please contact us for a free, no obligation quote and compe...
"Loft conversion" - HARROW, job posted 04/04/26
RLC Construction
RLC Construction are here to help customers who need an Extension Builder in HA3. We offer a competitive rate to complete all your extension builde...
"Loft conversion" - HARROW ON THE HILL, job posted 29/09/25
Chrysalis
Wealdstone, HA3
Chrysalis are here to help customers who need an Extension Builder in HA3. We offer a competitive rate to complete all your extension buildering jo...
"Garden office" - HARROW ON THE HILL, job posted 20/07/25
PERFORMA CONSTRUCTION LIMITED
Relax... you have found a reliable extension builder in HA3. PERFORMA CONSTRUCTION LIMITED is a friendly and reliable company based in HA3 who cons...
"Loft conversion" - HARROW ON THE HILL, job posted 05/07/25
Volton Building & Paving
Volton Building & Paving is a trusted extension builder serving customers in HA3 and the surrounding area. Contact us to today to get a competitive...
"Loft conversion" - HARROW ON THE HILL, job posted 07/03/25
Platinum Premier Projects & Premier Electrics
Platinum Electrics is a Branch off Platinum Premier Projects who deal in all types of construction projects. Platinum Electrics are based in London...
"Two storey extension" - HA7, job posted 13/01/25
BR Building Services Limited
BR Building Services Limited is a trusted extension builder serving customers in HA3 and the surrounding area. Contact us to today to get a competi...
"Dormer loft conversion" - HARROW, job posted 14/08/24
A D C BUILDERS
Trusted and professional extension builder in HA3. Experienced in all extension buildering work and keeping within budget and on quote. A D C BUILD...
"Loft conversion" - HARROW, job posted 09/08/24
EUROCONTRACTOR LIMITED
Karsan Dabasia
Harrow, HA3
Trusted and professional extension builder in HA3. Experienced in all extension buildering work and keeping within budget and on quote. EUROCONTRAC...
Stamp Design & Build Ltd
Stamp Design & Build Ltd is a trusted extension builder serving customers in HA3 and the surrounding area. Contact us to today to get a competitive...
Marku Builders Ltd
Harrow, HA3
Marku Builders Ltd is an established extension buildering business in HA3. We come highly recommended and provide competitive quotes for your work....
MONTY MCCARTHY BUILDERS
Need an Extension Builder in HA3? MONTY MCCARTHY BUILDERS has been helping local clients (10 mile radius) with their extension buildering jobs for ...
P Connolly Builders
Trusted and professional extension builder in HA3. Experienced in all extension buildering work and keeping within budget and on quote. P Connolly ...
EDGWARE BUILDER
EDGWARE BUILDER are here to help customers who need an Extension Builder in HA3. We offer a competitive rate to complete all your extension builder...
Eternal Design and Build Ltd
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Fitz Building Services Limited
Need to find an Extension Builder near you for all your extension buildering work?
Fitz Building Services Limited provides a local, trusted...
Ionesi Builders in Harrow
Ionesi Builders
Harrow, HA3
At Ionesi Builders in Harrow, we specialise in delivering dependable and high-quality construction services as experienced builders in Harrow servi...
O DAMIEAN BUILDING SERVICES
Experienced extension builder ready to quote for your work. O DAMIEAN BUILDING SERVICES is the best extension builder in HA3. No obligation free qu...
BUILDING SERVICES (UK) LTD
Wealdstone, HA3
Experienced extension builder ready to quote for your work. BUILDING SERVICES (UK) LTD is the best extension builder in HA3. No obligation free quo...
Eddybuild Contractors Ltd
Eddybuild Contractors Ltd is an established and experienced local extension builder in HA3. Please contact us for a free, no obligation quote and c...
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Use these steps to find Extension Builders in HA3 for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in HA3. 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 HA3 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 - £26,192
Garden office - £10,192
Granny annexe - £87,192
Build a flat roof extension - £22,192
Convert a Garage - £16,192
Hip to gable loft conversion - £42,192
Convert a bungalow loft - £29,192
Build a dormer loft conversion - £42,192
Build a swimming pool - £81,192
Build a Mansard loft conversion - £52,192
Concrete foundations - £6,442
Underpin a building - £17,692
Two storey extension - £88,288
Convert a basement - £39,660
Side return extension - £43,660
Loft conversion - £35,550
Garage - £18,692
Single storey extension - £58,840
Outbuilding - £10,192
Install an RSJ - £2,392
Build a kitchen extension - £42,192
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