From £6,378
Need to find an Extension Builder near you for all your extension buildering work?
All Trades Builders provides a local, trusted extension ...
From £6,330
Brixton, SW2
Atelier 10 are here to help customers who need an Extension Builder in Brixton. We offer a competitive rate to complete all your extension builderi...
From £6,330
Quality Carpentry is a trusted extension builder serving customers in Brixton and the surrounding area. Contact us to today to get a competitive qu...
From £6,602
Brixton, SW2
Relax... you have found a reliable extension builder in Brixton. M PIETROW T/A M P BUILDERS is a friendly and reliable company based in Brixton who...
From £6,754
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,506
Greater London, SW2
Magic Projects London Ltd is an established and experienced local extension builder in Brixton. Please contact us for a free, no obligation quote a...
From £6,602
Since first working together in 2007 we have steadily created a portfolio of excellent refurbishment commissions tailored to our clients’ satisfa...
From £6,514
Brixton Streatham, SW2
Complete Construction London Limited is a trusted extension builder serving customers in Brixton and the surrounding area. Contact us to today to g...
From £6,354
Build and Convert Services is a trusted extension builder serving customers in Brixton and the surrounding area. Contact us to today to get a compe...
From £6,450
Our building services company Basenet Ltd have sixteen years experience and have been helping customers in London and the surrounding area by provi...

Concrete foundations range from the £6,330 (Atelier 10 based in SW2) to £6,754 (Bantos Limited based in sw2) in Brixton.
Comparing extension builders estimates for laying concrete foundations gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Find out the exact cost of laying concrete foundations in Brixton by posting a job with HaMuch. We will send it to extension builders who can give you a detailed quote.
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.

Underpin a building - £17,732

Two storey extension - £88,348

Build a timber frame extension - £26,232

Build a swimming pool - £81,232

Single storey extension - £59,640

Side return extension - £44,110

Install an RSJ - £2,432

Outbuilding - £10,232

Build a Mansard loft conversion - £52,232

Loft conversion - £35,925

Build a kitchen extension - £42,232

Hip to gable loft conversion - £42,232

Granny annexe - £87,232

Garden office - £10,232

Convert a Garage - £16,232

Garage - £18,732

Build a flat roof extension - £22,232

Build a dormer loft conversion - £42,232

Concrete foundations - £6,482

Convert a bungalow loft - £29,232

Convert a basement - £40,110