From £6,266
Highbury, N5
Trusted and professional extension builder in N5. Experienced in all extension buildering work and keeping within budget and on quote. CAPITAL CONS...
From £6,506
DLER SINGH D S BUILDERS are here to help customers who need an Extension Builder in N5. We offer a competitive rate to complete all your extension ...
From £6,266
COMPLETE BUILDING COMPANY are here to help customers who need an Extension Builder in N5. We offer a competitive rate to complete all your extensio...
From £6,274
Brooks Builders & Decorators is an established extension buildering business in N5. We come highly recommended and provide competitive quotes for y...
From £6,250
Need an Extension Builder in N5? Bok Services Ltd has been helping local clients (5 mile radius) with their extension buildering jobs for many year...
From £6,154
Experienced extension builder ready to quote for your work. Nucleus Design Studio is the best extension builder in N5. No obligation free quotes an...
From £6,482
After spending 15 years working across various private practices, Richard decided to take the plunge and set up his own architecture and design com...
From £6,586
Mel Massey Studio, based in Finsbury Park, North London, offers interior design, interior styling and project management. With over 10 years of exp...
From £6,442
Relax... you have found a reliable extension builder in N5. London Trowel Co. is a friendly and reliable company based in N5 who consider no job as...

Concrete foundations range from the £6,154 (Nucleus Design Studio based in N7) to £6,586 (Mel Massey Studio based in N4) in N5.
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 N5 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 - £17,606

Two storey extension - £88,158

Build a timber frame extension - £26,106

Build a swimming pool - £81,106

Single storey extension - £57,112

Side return extension - £42,688

Install an RSJ - £2,306

Outbuilding - £10,106

Build a Mansard loft conversion - £52,106

Loft conversion - £34,740

Build a kitchen extension - £42,106

Hip to gable loft conversion - £42,106

Granny annexe - £87,106

Garden office - £10,106

Convert a Garage - £16,106

Garage - £18,606

Build a flat roof extension - £22,106

Build a dormer loft conversion - £42,106

Concrete foundations - £6,356

Convert a bungalow loft - £29,106

Convert a basement - £38,688