From £17,812
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,428
ASG Roofing & Upvc is an established extension buildering business in SL0. We come highly recommended and provide competitive quotes for your work....
From £17,668
Need to find an Extension Builder near you for all your extension buildering work?
J Wellington Roof & Home Improvements provides a local, ...
From £17,748
ROBINSON AND EDGSON BUILDERS is a trusted extension builder serving customers in SL0 and the surrounding area. Contact us to today to get a competi...
From £17,940
Led by Interior Designer, Carly O'Driscoll-Dommett, Island Exhibitions Residential Interiors provide beautiful & exceptional interiors, to make the...
From £17,452
Need an Extension Builder in SL0? Peter Cox Ltd - Uxbridge has been helping local clients (10 mile radius) with their extension buildering jobs for...
From £17,844
Need an Extension Builder in SL0? Galacticon has been helping local clients (10 mile radius) with their extension buildering jobs for many years. G...
From £17,716
Need an Extension Builder in SL0? MEAD BUILDING SERVICES LTD has been helping local clients (10 mile radius) with their extension buildering jobs f...
From £17,660
Need to find an Extension Builder near you for all your extension buildering work?
Richings Design and Build Ltd provides a local, trusted ...
From £17,940
We specialize in residential and commercial developments , delivering a highly personalized and professional customer focused service.We have skil...

Underpinning ranges from £17,428 (ASG Roofing & Upvc based in SL0) to £17,940 (Island Exhibitions Residential Interiors based in UB8), 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 SL0 by posting a job with HaMuch and we will send it to extension builders in SL0.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Hillingdon | £56 | £240 |
| Underpin A Building near Slough | £36 | £238 |
| Underpin A Building near Windsor & Maidenhead | £36 | £238 |
| Underpin A Building near Gerrards Cross | £37 | £244 |
| Underpin A Building near Windsor | £36 | £238 |
| Underpin A Building near Staines-upon-Thames | £36 | £231 |
| Underpin A Building near Egham | £36 | £228 |
| Underpin A Building near Hounslow | £37 | £243 |
| Underpin A Building near Rickmansworth | £37 | £241 |
| Underpin A Building near Harrow | £37 | £235 |
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 - £17,721

Two storey extension - £88,331

Build a timber frame extension - £26,221

Build a swimming pool - £81,221

Single storey extension - £59,416

Side return extension - £43,984

Install an RSJ - £2,421

Outbuilding - £10,221

Build a Mansard loft conversion - £52,221

Loft conversion - £35,820

Build a kitchen extension - £42,221

Hip to gable loft conversion - £42,221

Granny annexe - £87,221

Garden office - £10,221

Convert a Garage - £16,221

Garage - £18,721

Build a flat roof extension - £22,221

Build a dormer loft conversion - £42,221

Concrete foundations - £6,471

Convert a bungalow loft - £29,221

Convert a basement - £39,984