From £6,298
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in Cockfosters. No obligation free...
From £6,562
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,642
Need an Extension Builder in Cockfosters? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for ...
From £6,298
Trusted and professional extension builder in Cockfosters. Experienced in all extension buildering work and keeping within budget and on quote. WHI...
From £6,434
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in Cockfosters. No obligation free quot...
From £6,810
Cockfosters, EN4
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...
From £6,346
Experienced extension builder ready to quote for your work. Mr is the best extension builder in Cockfosters. No obligation free quotes and many hap...
From £6,234
JK Doors is a trusted extension builder serving customers in Cockfosters and the surrounding area. Contact us to today to get a competitive quote f...
From £6,442
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
From £6,562
skilled worker who specializes in completing a wide range of building and renovation projects

Concrete foundations range from the £6,234 (JK Doors based in W1W) to £6,810 (Rafix Building based in EN4) in Cockfosters.
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 Cockfosters 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 - £17,713

Two storey extension - £88,319

Build a timber frame extension - £26,213

Build a swimming pool - £81,213

Single storey extension - £59,256

Side return extension - £43,894

Install an RSJ - £2,413

Outbuilding - £10,213

Build a Mansard loft conversion - £52,213

Loft conversion - £35,745

Build a kitchen extension - £42,213

Hip to gable loft conversion - £42,213

Granny annexe - £87,213

Garden office - £10,213

Convert a Garage - £16,213

Garage - £18,713

Build a flat roof extension - £22,213

Build a dormer loft conversion - £42,213

Concrete foundations - £6,463

Convert a bungalow loft - £29,213

Convert a basement - £39,894