From £6,578
London, E3
Need to find an Extension Builder near you for all your extension buildering work?
Reconstruction provides a local, trusted extension build...
From £6,322
Experienced extension builder ready to quote for your work. Glenward Builders Ltd is the best extension builder in E3. No obligation free quotes an...
From £6,610
Bow, E3
Relax... you have found a reliable extension builder in E3. Darren & Valentin Construction & Maintenance is a friendly and reliable company based i...
From £6,514
F I X U P are here to help customers who need an Extension Builder in E3. We offer a competitive rate to complete all your extension buildering job...
From £6,202
Hudson Bespoke Buildings is a trusted extension builder serving customers in E3 and the surrounding area. Contact us to today to get a competitive ...
From £6,226
ISLE CONSTRUCTION LTD is a trusted extension builder serving customers in E3 and the surrounding area. Contact us to today to get a competitive quo...
From £6,618
We're a team of builders and tradespeople who aim to provide quality service to people looking to renovate and build their dream home. We are sick ...
From £6,514
Andy Tunmer Building Services is an established and experienced local extension builder in E3. Please contact us for a free, no obligation quote an...
From £6,602
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,466
Trusted and professional extension builder in E3. Experienced in all extension buildering work and keeping within budget and on quote. AB Building ...

Concrete foundations range from the £6,202 (Hudson Bespoke Buildings based in E15) to £6,618 (Team Constructions based in E14) in E3.
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 E3 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 - £17,715

Two storey extension - £88,323

Build a timber frame extension - £26,215

Build a swimming pool - £81,215

Single storey extension - £59,304

Side return extension - £43,921

Install an RSJ - £2,415

Outbuilding - £10,215

Build a Mansard loft conversion - £52,215

Loft conversion - £35,768

Build a kitchen extension - £42,215

Hip to gable loft conversion - £42,215

Granny annexe - £87,215

Garden office - £10,215

Convert a Garage - £16,215

Garage - £18,715

Build a flat roof extension - £22,215

Build a dormer loft conversion - £42,215

Concrete foundations - £6,465

Convert a bungalow loft - £29,215

Convert a basement - £39,921