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D & R Roofing & Loft Conversions, Building & Design
Relax... you have found a reliable extension builder in SM5. D & R Roofing & Loft Conversions, Building & Design is a friendly and reliable company...
"For garden extention" - SM5, job posted 23/06/26
CSJ Building Services
Trusted and professional extension builder in SM5. Experienced in all extension buildering work and keeping within budget and on quote. CSJ Buildin...
"Thank you so much single story extension" - NORTH CHEAM, job posted 27/10/25
Masters Property Services
Carshalton, SM5
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
HELIX BUILDING SOLUTIONS LTD
Experienced extension builder ready to quote for your work. HELIX BUILDING SOLUTIONS LTD is the best extension builder in SM5. No obligation free q...
NCN Projects
Experienced extension builder ready to quote for your work. NCN Projects is the best extension builder in SM5. No obligation free quotes and many h...
REA CONSTRUCTION LTD
REA CONSTRUCTION LTD are here to help customers who need an Extension Builder in SM5. We offer a competitive rate to complete all your extension bu...
Lee Builders & Decorators
Trusted and professional extension builder in SM5. Experienced in all extension buildering work and keeping within budget and on quote. Lee Builder...
Rayner & Cook Building Services
Experienced extension builder ready to quote for your work. Rayner & Cook Building Services is the best extension builder in SM5. 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...
BROMLEY TIMBER AND BUILDERS ME
Need to find an Extension Builder near you for all your extension buildering work?
BROMLEY TIMBER AND BUILDERS ME provides a local, trusted...
FKN Building Services
Need an Extension Builder in SM5? FKN Building Services has been helping local clients (10 mile radius) with their extension buildering jobs for ma...
S & S CONSTRUCTION (UK) LTD
Relax... you have found a reliable extension builder in SM5. S & S CONSTRUCTION (UK) LTD is a friendly and reliable company based in SM5 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
KADEK BUILDING SERVICES is a trusted extension builder serving customers in SM5 and the surrounding area. Contact us to today to get a competitive ...
£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...
£45/hr
£286/day
Multi Hands Services Limited
Lukasz Worek
Multi Hands Services Limited is an established and experienced local extension builder in SM5. Please contact us for a free, no obligation quote an...
£48/hr
£306/day
KMI London Ltd
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£47/hr
£296/day
ARK Building & Maintenance Ltd
Adam
ARK Building & Maintenance Ltd is an established extension buildering business in SM5. We come highly recommended and provide competitive quotes fo...
£48/hr
£298/day
General Systems Construction Limited
We design, build and renovate to the highest standard. Our team of revolutionaries is dedicated to realising your passion and making your vision ou...
£48/hr
£300/day
David Ingram Builder
Need to find an Extension Builder near you for all your extension buildering work?
David Ingram Builder provides a local, trusted extension...
Quickly find an Extension Builder in SM5
Use these steps to find Extension Builders in SM5 for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in SM5. 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 SM5 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 - £26,192
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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