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JJSR Construction Ltd
J Wijayamohan
JJSR Construction Ltd is an established and experienced local extension builder in Wealdstone. Please contact us for a free, no obligation quote an...
"Loft conversion" - HARROW, job posted 04/04/26
RLC Construction
RLC Construction are here to help customers who need an Extension Builder in Wealdstone. We offer a competitive rate to complete all your extension...
"Loft conversion" - HARROW ON THE HILL, job posted 29/09/25
Chrysalis
Chrysalis are here to help customers who need an Extension Builder in Wealdstone. We offer a competitive rate to complete all your extension builde...
"Garden office" - HARROW ON THE HILL, job posted 20/07/25
PERFORMA CONSTRUCTION LIMITED
Wealdstone, HA3
Relax... you have found a reliable extension builder in Wealdstone. PERFORMA CONSTRUCTION LIMITED is a friendly and reliable company based in Weald...
"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 Wealdstone and the surrounding area. Contact us to today to get a comp...
"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 Wealdstone and the surrounding area. Contact us to today to get a ...
"Dormer loft conversion" - HARROW, job posted 14/08/24
A D C BUILDERS
Trusted and professional extension builder in Wealdstone. Experienced in all extension buildering work and keeping within budget and on quote. A D ...
"Loft conversion" - HARROW, job posted 09/08/24
EUROCONTRACTOR LIMITED
Karsan Dabasia
Trusted and professional extension builder in Wealdstone. Experienced in all extension buildering work and keeping within budget and on quote. EURO...
Stamp Design & Build Ltd
Stamp Design & Build Ltd is a trusted extension builder serving customers in Wealdstone and the surrounding area. Contact us to today to get a comp...
Marku Builders Ltd
Marku Builders Ltd is an established extension buildering business in Wealdstone. We come highly recommended and provide competitive quotes for you...
MONTY MCCARTHY BUILDERS
Wealdstone, HA3
Need an Extension Builder in Wealdstone? MONTY MCCARTHY BUILDERS has been helping local clients (10 mile radius) with their extension buildering jo...
P Connolly Builders
Trusted and professional extension builder in Wealdstone. Experienced in all extension buildering work and keeping within budget and on quote. P Co...
EDGWARE BUILDER
EDGWARE BUILDER are here to help customers who need an Extension Builder in Wealdstone. We offer a competitive rate to complete all your extension ...
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
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 Wealdstone. No obligation ...
BUILDING SERVICES (UK) LTD
Experienced extension builder ready to quote for your work. BUILDING SERVICES (UK) LTD is the best extension builder in Wealdstone. No obligation f...
Eddybuild Contractors Ltd
Wealdstone Harrow, HA3
Eddybuild Contractors Ltd is an established and experienced local extension builder in Wealdstone. Please contact us for a free, no obligation quot...
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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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