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Mr
Jonathan Rimmer
Experienced extension builder ready to quote for your work. Mr is the best extension builder in W12. No obligation free quotes and many happy custo...
"Side return extension" - NW10, job posted 14/08/25
1st & 2nd Fix Vasconstruct
Vas Constructs
RUBBERCOVER™ EPDM Permaroof rubber cover and roof system. Lead flashing. NCTS. Timber Frame Buildings. Refurbish fit out, structural ...
"Loft conversion" - W12, job posted 21/04/25
M & A UK Ltd
Relax... you have found a reliable extension builder in W12. M & A UK Ltd is a friendly and reliable company based in W12 who consider no job as to...
"Loft conversion" - W12, job posted 20/04/25
Newpark Construction
Newpark Construction are here to help customers who need an Extension Builder in W12. We offer a competitive rate to complete all your extension bu...
"Loft conversion" - W12, job posted 23/10/24
Ferdas Design & Build Ltd
At Ferdas Design & Build Ltd we have been fitting bespoke bathrooms since 2013. We pride ourselves on being the go-to bathroom fitters for discerni...
"Flat roof extension for a period mews terraced house. We'd like a bedroom extension with full bathroom and a roof top terrace. Footprint is roughly 8.5m x 6m." - W6, job posted 06/10/24
The Diamond Property Service Ltd
Tomasz Pedowicz
Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...
"Mansard loft conversion" - SHEPHERD'S BUSH, job posted 26/09/24
HUGHES BUILDERS
Shepherd's Bush, W12
Experienced extension builder ready to quote for your work. HUGHES BUILDERS is the best extension builder in W12. No obligation free quotes and man...
"Garage" - W3, job posted 18/06/24
R Burton & Sons Builders
R Burton & Sons Builders are here to help customers who need an Extension Builder in W12. We offer a competitive rate to complete all your extensio...
"Basement conversion" - W4, job posted 07/08/23
Heaven Sent Construction
Shepherd's Bush, W12
Need to find an Extension Builder near you for all your extension buildering work?
Heaven Sent Construction provides a local, trusted exten...
LINE BUILDERS LTD
LINE BUILDERS LTD is an established extension buildering business in W12. We come highly recommended and provide competitive quotes for your work.<...
P and J Roofing & Building Contractors Ltd
P and J Roofing & Building Contractors Ltd is a trusted extension builder serving customers in W12 and the surrounding area. Contact us to today to...
H G Builders
H G Builders is an established and experienced local extension builder in W12. Please contact us for a free, no obligation quote and competitive ra...
Graham Construction
Shepherd's Bush, W12
Graham Construction is an established extension buildering business in W12. We come highly recommended and provide competitive quotes for your work...
Specialist Screeding
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
JNJ Building Services Ltd
Lon, W12
Experienced extension builder ready to quote for your work. JNJ Building Services Ltd is the best extension builder in W12. No obligation free quot...
SDM Services
SDM Services is an established extension buildering business in W12. We come highly recommended and provide competitive quotes for your work.
£43/hr
£269/day
Good Design and Build
Good Design and Build are here to help customers who need an Extension Builder in W12. We offer a competitive rate to complete all your extension b...
£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 W12. Experienced in all extension buildering work and keeping within budget and on quote. Hartley Lim...
£47/hr
£292/day
Smart Property Sourcing
Smart Property Sourcing is a trusted extension builder serving customers in W12 and the surrounding area. Contact us to today to get a competitive ...
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- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in W12. 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 W12 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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