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"For garden extention" - SM5, job posted 23/06/26
J & D Construction
Trusted and professional extension builder in SM4. Experienced in all extension buildering work and keeping within budget and on quote. J & D Const...
"Thank you so much single story extension" - NORTH CHEAM, job posted 27/10/25
ACE BUILDING CONTRACTORS AND D
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Build a hip to gable loft conversion" - KT4, job posted 22/09/25
CSJ Building Services
Trusted and professional extension builder in SM4. Experienced in all extension buildering work and keeping within budget and on quote. CSJ Buildin...
"Flat roof extension" - CR44, job posted 13/05/25
Masters Property Services
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Just a general enquiry" - KT4, job posted 02/10/23
You Nailed It Ltd
At You Nailed It Ltd we have been fitting bespoke bathrooms since 2008.It is a well-known fact that bathrooms sell houses. They also add a ...
Flanagan Construction Ltd
Tom Flanagan
Morden, SM4
Very experienced Builder in this area ,Epsom Sutton Raynes pk Wimbledon areas mostly now on recommendation usually also supply Drawings&a Structu...
TTG CONSTRUCTION LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Racsel Building Services Ltd
Trusted and professional extension builder in SM4. Experienced in all extension buildering work and keeping within budget and on quote. Racsel Buil...
TRITON BUILDING RESTN LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Racsel Building Services Ltd
Need to find an Extension Builder near you for all your extension buildering work?
Racsel Building Services Ltd provides a local, trusted e...
NCN Projects
Experienced extension builder ready to quote for your work. NCN Projects is the best extension builder in SM4. No obligation free quotes and many h...
SEDGWICK BUILDING SERVICES LLP
Morden, SM4
SEDGWICK BUILDING SERVICES LLP are here to help customers who need an Extension Builder in SM4. We offer a competitive rate to complete all your ex...
A A CONSTRUCTION LONDON LTD
A A CONSTRUCTION LONDON LTD is an established extension buildering business in SM4. We come highly recommended and provide competitive quotes for y...
FALCON BUILDERS
Need an Extension Builder in SM4? FALCON BUILDERS has been helping local clients (10 mile radius) with their extension buildering jobs for many yea...
Lee Builders & Decorators
Trusted and professional extension builder in SM4. Experienced in all extension buildering work and keeping within budget and on quote. Lee Builder...
£42/hr
£262/day
KADEK BUILDING SERVICES
KADEK BUILDING SERVICES is a trusted extension builder serving customers in SM4 and the surrounding area. Contact us to today to get a competitive ...
£45/hr
£283/day
JG BUILDING SERVICES
JG BUILDING SERVICES is an established extension buildering business in SM4. We come highly recommended and provide competitive quotes for your wor...
£45/hr
£284/day
DesignBox Architecture Limited
DesignBox Architecture Ltd is a chartered architectural design practice based in South West London. We can offer a full range of architectural serv...
£47/hr
£292/day
DP BUILDERS UK LTD
DP BUILDERS UK LTD is a trusted extension builder serving customers in SM4 and the surrounding area. Contact us to today to get a competitive quote...
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- Enter your details: We’ll match you with Extension Builders in SM4. 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 SM4 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 - £26,184
Garden office - £10,184
Granny annexe - £87,184
Build a flat roof extension - £22,184
Convert a Garage - £16,184
Hip to gable loft conversion - £42,184
Convert a bungalow loft - £29,184
Build a dormer loft conversion - £42,184
Build a swimming pool - £81,184
Build a Mansard loft conversion - £52,184
Concrete foundations - £6,434
Underpin a building - £17,684
Two storey extension - £88,276
Convert a basement - £39,570
Side return extension - £43,570
Loft conversion - £35,475
Garage - £18,684
Single storey extension - £58,680
Outbuilding - £10,184
Install an RSJ - £2,384
Build a kitchen extension - £42,184
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