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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...
"Loft conversion quote" - EN5, job posted 20/06/26
New Finishes
New Finishes is a trusted extension builder serving customers in High Barnet and the surrounding area. Contact us to today to get a competitive quo...
"Loft conversion" - EN5, job posted 20/06/26
Homeland Building Ltd
Homeland Building Ltd is a trusted extension builder serving customers in High Barnet and the surrounding area. Contact us to today to get a compet...
Wittick Building Ltd
Wittick Building Ltd is a trusted extension builder serving customers in High Barnet and the surrounding area. Contact us to today to get a competi...
Roni Lofts Conversions Ltd
Need an Extension Builder in High Barnet? Roni Lofts Conversions Ltd has been helping local clients (10 mile radius) with their extension builderin...
Odp Builders
Need an Extension Builder in High Barnet? Odp Builders has been helping local clients (5 mile radius) with their extension buildering jobs for many...
D.J Coyle & Co.Ltd
Trusted and professional extension builder in High Barnet. Experienced in all extension buildering work and keeping within budget and on quote. D.J...
WOODVALLEY BUILDERS LTD
Need to find an Extension Builder near you for all your extension buildering work?
WOODVALLEY BUILDERS LTD provides a local, trusted extens...
A Sparky Technical Building Services
Relax... you have found a reliable extension builder in High Barnet. A Sparky Technical Building Services is a friendly and reliable company based ...
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...
The Hadley Loft Company Ltd
Are you looking to make the most of your property with a loft conversion? The Hadley Loft Company Ltd can help. Based in Barnet, we provide high-en...
Home Projects
Relax... you have found a reliable extension builder in High Barnet. Home Projects is a friendly and reliable company based in High Barnet who cons...
I Builder
I Builder are a well established, reliable and trustworthy company with over twenty years' experience.We are based in Barnet covering Barne...
£49/hr
£309/day
BT Projects London Ltd
At BT Projects London Ltd we have been fitting bespoke bathrooms for 14 years. We pride ourselves on being the go-to bathroom fitt...
£25/hr
£246/day
Floor Sanding Specialists
Sylwester Szymanski
Professional wood floor sanding . High standard work.
£46/hr
£295/day
Cox Format Developments Limited
Cox Format Developments Limited is a professional building company. The majority of our work is through personal recommendations. We are always hap...
£40/hr
£251/day
ACME CONSTRUCTION LTD
Experienced extension builder ready to quote for your work. ACME CONSTRUCTION LTD is the best extension builder in High Barnet. No obligation free ...
£45/hr
£282/day
Optma Builders ltd
Trusted and professional extension builder in High Barnet. Experienced in all extension buildering work and keeping within budget and on quote. Opt...
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Use these steps to find Extension Builders in High Barnet for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in High Barnet. 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 High Barnet 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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