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Mr
Jonathan Rimmer
Experienced extension builder ready to quote for your work. Mr is the best extension builder in W9. No obligation free quotes and many happy custom...
"Two storey extension" - NW6, job posted 27/09/26
V.S.P
V.S.P is a trusted extension builder serving customers in W9 and the surrounding area. Contact us to today to get a competitive quote for extension...
"Side return extension" - NW10, job posted 14/08/25
BPS Building
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
NWL Renovations Ltd
Patrick Gavin
Need an Extension Builder in W9? NWL Renovations Ltd has been helping local clients (5 mile radius) with their extension buildering jobs for many ...
M & A UK Ltd
Relax... you have found a reliable extension builder in W9. M & A UK Ltd is a friendly and reliable company based in W9 who consider no job as too ...
ELJHANI BUILDING & PROPERTY MANAGEMENT SERVICES LTD
Hussein Eljhani
We are highly professional Builders Company, hones pricing and reliable, we leave all areas clean and tidy.
Plum & Bros Loft Ltd
Plum & Bros Loft Ltd is an established extension buildering business in W9. We come highly recommended and provide competitive quotes for your work...
Graham Construction
Graham Construction is an established extension buildering business in W9. We come highly recommended and provide competitive quotes for your work....
EUROBUILD PROPERTIES CO LTD
Need to find an Extension Builder near you for all your extension buildering work?
EUROBUILD PROPERTIES CO LTD provides a local, trusted ex...
SDM Services
SDM Services is an established extension buildering business in W9. We come highly recommended and provide competitive quotes for your work.
£45/hr
£279/day
Pro Fast Build
Pro Fast Build Ltd. is a well established building company specialising in all areas of building work – interior and exterior. We are the best ch...
£45/hr
£279/day
Hartley Limited
Trusted and professional extension builder in W9. Experienced in all extension buildering work and keeping within budget and on quote. Hartley Limi...
£50/hr
£311/day
K & S
At K&S Interiors Ltd, we offer complete interior and exterior specialising in full home or office refurbishment to clients in Kensington, Chelsea a...
£45/hr
£282/day
Vyas Design
Need to find an Extension Builder near you for all your extension buildering work?
Vyas Design provides a local, trusted extension builderi...
£41/hr
£253/day
FrontierstroyUK
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£46/hr
£293/day
Staunch And Flow Limited
Staunch and Flow is a small, experienced, and cost-effective London-based plumbing/heating engineering firm. We specialise in kitchen and bathroom ...
£45/hr
£280/day
Homeconcepts
Need to find an Extension Builder near you for all your extension buildering work?
Homeconcepts provides a local, trusted extension builder...
£49/hr
£304/day
Blue
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£42/hr
£263/day
ProHome Construction ltd
Greater London, W9
Trusted and professional extension builder in W9. Experienced in all extension buildering work and keeping within budget and on quote. ProHome Cons...
£47/hr
£292/day
Cly Design
Cly Design offers comprehensive interior design services, from concept to final installation, and collaborates alongside a range of trusted supplie...
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Use these steps to find Extension Builders in W9 for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in W9. 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 W9 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 - £26,232
Garden office - £10,232
Granny annexe - £87,232
Build a flat roof extension - £22,232
Convert a Garage - £16,232
Hip to gable loft conversion - £42,232
Convert a bungalow loft - £29,232
Build a dormer loft conversion - £42,232
Build a swimming pool - £81,232
Build a Mansard loft conversion - £52,232
Concrete foundations - £6,482
Underpin a building - £17,732
Two storey extension - £88,348
Convert a basement - £40,110
Side return extension - £44,110
Loft conversion - £35,925
Garage - £18,732
Single storey extension - £59,640
Outbuilding - £10,232
Install an RSJ - £2,432
Build a kitchen extension - £42,232
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