Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Hardeep Samra
Southall, UB1
MJ Builders (London) Ltd are here to help customers who need an Extension Builder in Southall. We offer a competitive rate to complete all your ext...
Varda
Need an Extension Builder in Southall? VA Structures has been helping local clients (10 mile radius) with their extension buildering jobs for many ...
Trusted and professional extension builder in Southall. Experienced in all extension buildering work and keeping within budget and on quote. DC Bui...
Bill Matharu
Matharu Buildings is an established extension buildering business in Southall. We come highly recommended and provide competitive quotes for your w...
Bhupinder Singh
Trusted and professional extension builder in Southall. Experienced in all extension buildering work and keeping within budget and on quote. Elegan...
Global Building & Designs Ltd is an established and experienced local extension builder in Southall. Please contact us for a free, no obligation qu...
Southall, UB2
JD Construction is an established and experienced local extension builder in Southall. Please contact us for a free, no obligation quote and compet...
Image Design & Consultants is a trusted extension builder serving customers in Southall and the surrounding area. Contact us to today to get a comp...
Need an Extension Builder in Southall? Ava Constructions & Decors Ltd has been helping local clients (10 mile radius) with their extension builderi...

Underpinning ranges from £17,444 (Ava Constructions & Decors Ltd based in UB3) to £17,812 (T M Builder based in UB4), but the final cost will depend on the method of underpinning used, how much of your foundations need underpinning and where you live.
Comparing extension builders estimates for underpinning gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get quotes to underpin your home in Southall by posting a job with HaMuch and we will send it to extension builders in Southall.
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 - £17,661

Two storey extension - £88,241

Build a timber frame extension - £26,161

Build a swimming pool - £81,161

Single storey extension - £58,216

Side return extension - £43,309

Install an RSJ - £2,361

Outbuilding - £10,161

Build a Mansard loft conversion - £52,161

Loft conversion - £35,258

Build a kitchen extension - £42,161

Hip to gable loft conversion - £42,161

Granny annexe - £87,161

Garden office - £10,161

Convert a Garage - £16,161

Garage - £18,661

Build a flat roof extension - £22,161

Build a dormer loft conversion - £42,161

Concrete foundations - £6,411

Convert a bungalow loft - £29,161

Convert a basement - £39,309