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Rafix Building
Rafal Szczepanski
Our homes need to be regularly maintained and from time to time they need to be rejuvenated, modernised and enhanced. When it comes to building wor...
"Underpinning" - N20, job posted 01/03/26
WT Construction Service Ltd
Need the extension buildering job done quickly without breaking the bank? WT Construction Service Ltd offer fast, reliable, and affordable extensio...
"Loft conversion" - N20, job posted 11/01/24
New Finishes
New Finishes is a trusted extension builder serving customers in N20 and the surrounding area. Contact us to today to get a competitive quote for e...
Pavillion Building Services
Relax... you have found a reliable extension builder in N20. Pavillion Building Services is a friendly and reliable company based in N20 who consid...
Homeland Building Ltd
Homeland Building Ltd is a trusted extension builder serving customers in N20 and the surrounding area. Contact us to today to get a competitive qu...
Wittick Building Ltd
Wittick Building Ltd is a trusted extension builder serving customers in N20 and the surrounding area. Contact us to today to get a competitive quo...
Roni Lofts Conversions Ltd
Need an Extension Builder in N20? Roni Lofts Conversions Ltd has been helping local clients (10 mile radius) with their extension buildering jobs f...
Onyx Iv
Ivaylo Shkodrov
Extremely reliable service . Flexibility, correct, listening customer. Wide experience.
Taylor Construction Services Ltd
Relax... you have found a reliable extension builder in N20. Taylor Construction Services Ltd is a friendly and reliable company based in N20 who c...
Raf's Building Service
Need to find an Extension Builder near you for all your extension buildering work?
Raf's Building Service provides a local, trusted extensi...
Odp Builders
Whetstone, N20
Need an Extension Builder in N20? Odp Builders has been helping local clients (5 mile radius) with their extension buildering jobs for many years. ...
Homeworks Design & Build Ltd
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
D.J Coyle & Co.Ltd
Whetstone, N20
Trusted and professional extension builder in N20. Experienced in all extension buildering work and keeping within budget and on quote. D.J Coyle &...
A Sparky Technical Building Services
Relax... you have found a reliable extension builder in N20. A Sparky Technical Building Services is a friendly and reliable company based in N20 w...
Reix London Ltd
Building services company Reix London Ltd has been helping customers in North London and the surrounding area for over 10 years providing professio...
Home Projects
Relax... you have found a reliable extension builder in N20. Home Projects is a friendly and reliable company based in N20 who consider no job as t...
Mansarda Ltd
Need to find an Extension Builder near you for all your extension buildering work?
Mansarda Ltd provides a local, trusted extension builder...
R & I Builders
R & I Builders is an established extension buildering business in N20. We come highly recommended and provide competitive quotes for your work.
...Chelebi Builders
Chelebi Builders is a bespoke Build & Design construction company based in North London. Our expertise range from Loft Conversions, Extensions, Hou...
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Use these steps to find Extension Builders in N20 for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in N20. 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 N20 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 - £26,200
Garden office - £10,200
Granny annexe - £87,200
Build a flat roof extension - £22,200
Convert a Garage - £16,200
Hip to gable loft conversion - £42,200
Convert a bungalow loft - £29,200
Build a dormer loft conversion - £42,200
Build a swimming pool - £81,200
Build a Mansard loft conversion - £52,200
Concrete foundations - £6,450
Underpin a building - £17,700
Two storey extension - £88,300
Convert a basement - £39,750
Side return extension - £43,750
Loft conversion - £35,625
Garage - £18,700
Single storey extension - £59,000
Outbuilding - £10,200
Install an RSJ - £2,400
Build a kitchen extension - £42,200
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