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GDW Construction
Relax... you have found a reliable extension builder in SM1. GDW Construction is a friendly and reliable company based in SM1 who consider no job a...
"For garden extention" - SM5, job posted 23/06/26
D & R Roofing & Loft Conversions, Building & Design
Relax... you have found a reliable extension builder in SM1. D & R Roofing & Loft Conversions, Building & Design is a friendly and reliable company...
"Thank you so much single story extension" - NORTH CHEAM, job posted 27/10/25
Hilton building contractors ltd
Hilton building contractors ltd is a trusted extension builder serving customers in SM1 and the surrounding area. Contact us to today to get a comp...
"Build a hip to gable loft conversion" - KT4, job posted 22/09/25
Amazing Space Design and Build Ltd.
Relax... you have found a reliable extension builder in SM1. Amazing Space Design and Build Ltd. is a friendly and reliable company based in SM1 wh...
"Just a general enquiry" - KT4, job posted 02/10/23
RM Sanwell Roofing
RM Sanwell Roofing is a trusted extension builder serving customers in SM1 and the surrounding area. Contact us to today to get a competitive quote...
CSJ Building Services
Trusted and professional extension builder in SM1. Experienced in all extension buildering work and keeping within budget and on quote. CSJ Buildin...
Masters Property Services
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
NCN Projects
Experienced extension builder ready to quote for your work. NCN Projects is the best extension builder in SM1. No obligation free quotes and many h...
SEDGWICK BUILDING SERVICES LLP
SEDGWICK BUILDING SERVICES LLP are here to help customers who need an Extension Builder in SM1. We offer a competitive rate to complete all your ex...
REA CONSTRUCTION LTD
REA CONSTRUCTION LTD are here to help customers who need an Extension Builder in SM1. We offer a competitive rate to complete all your extension bu...
FALCON BUILDERS
Need an Extension Builder in SM1? 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 SM1. Experienced in all extension buildering work and keeping within budget and on quote. Lee Builder...
Rayner & Cook Building Services
Sutton, SM1
Experienced extension builder ready to quote for your work. Rayner & Cook Building Services is the best extension builder in SM1. No obligation fre...
UK Services & Supplies Ltd
Need to find an Extension Builder near you for all your extension buildering work?
UK Services & Supplies Ltd provides a local, trusted ext...
S & S CONSTRUCTION (UK) LTD
Sutton, SM1
Relax... you have found a reliable extension builder in SM1. S & S CONSTRUCTION (UK) LTD is a friendly and reliable company based in SM1 who consid...
£43/hr
£268/day
Magna Building Services Ltd
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£42/hr
£262/day
KADEK BUILDING SERVICES
Sutton, SM1
KADEK BUILDING SERVICES is a trusted extension builder serving customers in SM1 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 SM1. We come highly recommended and provide competitive quotes for your wor...
£47/hr
£292/day
DP BUILDERS UK LTD
Sutton, SM1
DP BUILDERS UK LTD is a trusted extension builder serving customers in SM1 and the surrounding area. Contact us to today to get a competitive quote...
£42/hr
£262/day
M Hennessy Quality Roofing
Need to find an Extension Builder near you for all your extension buildering work?
M Hennessy Quality Roofing provides a local, trusted ext...
Quickly find an Extension Builder in SM1
Use these steps to find Extension Builders in SM1 for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in SM1. 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 SM1 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 - £26,216
Garden office - £10,216
Granny annexe - £87,216
Build a flat roof extension - £22,216
Convert a Garage - £16,216
Hip to gable loft conversion - £42,216
Convert a bungalow loft - £29,216
Build a dormer loft conversion - £42,216
Build a swimming pool - £81,216
Build a Mansard loft conversion - £52,216
Concrete foundations - £6,466
Underpin a building - £17,716
Two storey extension - £88,324
Convert a basement - £39,930
Side return extension - £43,930
Loft conversion - £35,775
Garage - £18,716
Single storey extension - £59,320
Outbuilding - £10,216
Install an RSJ - £2,416
Build a kitchen extension - £42,216
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