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The Perfectionist
Experienced extension builder ready to quote for your work. The Perfectionist is the best extension builder in SE4. No obligation free quotes and m...
"Convert a Garage" - SE13, job posted 14/09/26
S G Painting Contractor Ltd
Relax... you have found a reliable extension builder in SE4. S G Painting Contractor Ltd is a friendly and reliable company based in SE4 who consid...
£42/hr
£263/day
South East Builders
London, SE4
South East Builders are here to help customers who need an Extension Builder in SE4. We offer a competitive rate to complete all your extension bui...
£44/hr
£281/day
Baseline Build and Renovate Ltd
Baseline Build and Renovate Ltd is an established extension buildering business in SE4. We come highly recommended and provide competitive quotes f...
£37/hr
£235/day
FRIERN BUILDING LTD
FRIERN BUILDING LTD is an established extension buildering business in SE4. We come highly recommended and provide competitive quotes for your work...
£45/hr
£284/day
BERNARD CONSTRUCTION LTD
BERNARD CONSTRUCTION LTD are here to help customers who need an Extension Builder in SE4. We offer a competitive rate to complete all your extensio...
£42/hr
£262/day
S W BUILDPROVEMENT
Whether you are looking to build, extend or upgrade we will help. From building to decorating. Our professional team have the skills and experie...
£47/hr
£298/day
RM Building (London) Ltd
Trusted and professional extension builder in SE4. Experienced in all extension buildering work and keeping within budget and on quote. RM Building...
£41/hr
£260/day
CHRIS BALL & SON ROOFING LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£52/hr
£281/day
21st Century Design & Build Ltd
21st Century Design & Build Ltd is a one-stop solution for all your extension buildering needs. Establish over 10 years ago and covering 5 miles ar...
£46/hr
£289/day
blitbolt ltd
Greater London, SE4
Need to find an Extension Builder near you for all your extension buildering work?
blitbolt ltd provides a local, trusted extension builder...
£44/hr
£275/day
blitbolt ltd
We have a creative eye and like a challenge, often building bespoke and creative buildings and furniture. This is mixed with a wide experience of m...
£40/hr
£250/day
Justin Bailey
Greater London, SE4
Need an Extension Builder in SE4? Justin Bailey has been helping local clients (5 mile radius) with their extension buildering jobs for many years....
£43/hr
£270/day
AADO SERVICES LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£44/hr
£277/day
Demiri Builder Ltd
Our building services company Demiri Builder Ltd has 15 years’ experience in the industry. We have been helping customers in Lewisham and the sur...
£41/hr
£255/day
Dule Vida Property Design Ltd
Dule Vida Property Design Ltd is a trusted extension builder serving customers in SE4 and the surrounding area. Contact us to today to get a compet...
£43/hr
£265/day
Global Business BoxLttd
Global Business BoxLttd are here to help customers who need an Extension Builder in SE4. We offer a competitive rate to complete all your extension...
£49/hr
£306/day
DWL Construction Ltd
We pride ourselves on providing a professional, caring, and high-quality service and always meet our customers’ needs. Each contractor that works...
£46/hr
£286/day
Baseline Build & Renovate
Trusted and professional extension builder in SE4. Experienced in all extension buildering work and keeping within budget and on quote. Baseline Bu...
£45/hr
£280/day
TP Building & Development Services Ltd
TP Building & Development Services Ltd is an established and experienced local extension builder in SE4. Please contact us for a free, no obligatio...
Quickly find an Extension Builder in SE4
Use these steps to find Extension Builders in SE4 for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in SE4. 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 SE4 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 - £26,152
Garden office - £10,152
Granny annexe - £87,152
Build a flat roof extension - £22,152
Convert a Garage - £16,152
Hip to gable loft conversion - £42,152
Convert a bungalow loft - £29,152
Build a dormer loft conversion - £42,152
Build a swimming pool - £81,152
Build a Mansard loft conversion - £52,152
Concrete foundations - £6,402
Underpin a building - £17,652
Two storey extension - £88,228
Convert a basement - £39,210
Side return extension - £43,210
Loft conversion - £35,175
Garage - £18,652
Single storey extension - £58,040
Outbuilding - £10,152
Install an RSJ - £2,352
Build a kitchen extension - £42,152
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