Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,466
Need to find an Extension Builder near you for all your extension buildering work?
A Tutton Building Services Limited provides a local, tru...
From £6,570
ABAH Property Services Ltd is a trusted extension builder serving customers in DA2 and the surrounding area. Contact us to today to get a competiti...
From £6,370
ForsBuild Construction Ltd is a trusted extension builder serving customers in DA2 and the surrounding area. Contact us to today to get a competiti...
From £6,074
callisto construction is an established extension buildering business in DA2. We come highly recommended and provide competitive quotes for your wo...
From £6,290
Ideal Loft Ladders South East (SE) Ltd is an established extension buildering business in DA2. We come highly recommended and provide competitive q...

Concrete foundations range from the £6,074 (Callisto construction based in DA4) to £6,642 (Amberly Builders based in DA1) in DA2.
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 DA2 by posting a job with HaMuch. We will send it to extension builders who can give you a detailed quote.
"Concrete foundation" - DARTFORD, job posted 03/04/26
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 - £17,652

Two storey extension - £88,228

Build a timber frame extension - £26,152

Build a swimming pool - £81,152

Single storey extension - £58,040

Side return extension - £43,210

Install an RSJ - £2,352

Outbuilding - £10,152

Build a Mansard loft conversion - £52,152

Loft conversion - £35,175

Build a kitchen extension - £42,152

Hip to gable loft conversion - £42,152

Granny annexe - £87,152

Garden office - £10,152

Convert a Garage - £16,152

Garage - £18,652

Build a flat roof extension - £22,152

Build a dormer loft conversion - £42,152

Concrete foundations - £6,402

Convert a bungalow loft - £29,152

Convert a basement - £39,210