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 £6,674
Nouvell Decor is a trusted extension builder serving customers in Cockfosters and the surrounding area. Contact us to today to get a competitive qu...
From £7,866
Over 20 years experience
Client focussed and driven
Personal planning and completion of work
Warranty ...
From £6,362
Trusted and professional extension builder in Cockfosters. Experienced in all extension buildering work and keeping within budget and on quote. D D...
From £6,674
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,394
ABC Building & Maintenance Contractors Ltd is a trusted extension builder serving customers in Cockfosters and the surrounding area. Contact us to ...
From £6,434
Experienced extension builder ready to quote for your work. DIAL 1ST CONSTRUCTION LTD is the best extension builder in Cockfosters. No obligation f...
From £6,682
Krystian Wojasiewicz is a trusted extension builder serving customers in Cockfosters and the surrounding area. Contact us to today to get a competi...
From £6,410
Trusted and professional extension builder in Cockfosters. Experienced in all extension buildering work and keeping within budget and on quote. PAR...
From £6,498
C & A Contractors is a trusted extension builder serving customers in Cockfosters and the surrounding area. Contact us to today to get a competitiv...

Concrete foundations range from the £6,298 (J&J Building Solutions based in SW16) to £7,866 (GasHeat based in NW10) 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 - £17,879

Two storey extension - £88,569

Build a timber frame extension - £26,379

Build a swimming pool - £81,379

Single storey extension - £62,584

Side return extension - £45,766

Install an RSJ - £2,579

Outbuilding - £10,379

Build a Mansard loft conversion - £52,379

Loft conversion - £37,305

Build a kitchen extension - £42,379

Hip to gable loft conversion - £42,379

Granny annexe - £87,379

Garden office - £10,379

Convert a Garage - £16,379

Garage - £18,879

Build a flat roof extension - £22,379

Build a dormer loft conversion - £42,379

Concrete foundations - £6,629

Convert a bungalow loft - £29,379

Convert a basement - £41,766