From £17,612
Experienced extension builder ready to quote for your work. Avalon Building Services Ltd is the best extension builder in RG21. No obligation free ...
From £17,628
John McKinney Building is an established extension buildering business in RG21. We come highly recommended and provide competitive quotes for your ...
From £17,900
Need an Extension Builder in RG21? Dependon Limited has been helping local clients (20 mile radius) with their extension buildering jobs for many y...
From £17,828
Relax... you have found a reliable extension builder in RG21. CHAMPION BUILD LTD is a friendly and reliable company based in RG21 who consider no j...
From £17,828
Relax... you have found a reliable extension builder in RG21. Parkhouse Roofing is a friendly and reliable company based in RG21 who consider no jo...
From £17,668
D W BUILDERS is a trusted extension builder serving customers in RG21 and the surrounding area. Contact us to today to get a competitive quote for ...
From £17,764
Need an Extension Builder in RG21? BUILD IT DEVELOPMENT LIMITED has been helping local clients (20 mile radius) with their extension buildering job...
From £17,556
J & M Building Services are here to help customers who need an Extension Builder in RG21. We offer a competitive rate to complete all your extensio...
From £17,436
Trusted and professional extension builder in RG21. Experienced in all extension buildering work and keeping within budget and on quote. OAK BUILDI...
From £17,548
Experienced extension builder ready to quote for your work. S & M Builders is the best extension builder in RG21. No obligation free quotes and man...

Underpinning ranges from £17,436 (OAK BUILDING MANAGEMENT LTD based in RG22) to £17,900 (Dependon Limited based in RG21), 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 RG21 by posting a job with HaMuch and we will send it to extension builders in RG21.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Basingstoke | £39 | £274 |
| Underpin A Building near Basingstoke & Deane | £39 | £273 |
| Underpin A Building near Fleet | £41 | £270 |
| Underpin A Building near Thatcham | £38 | £266 |
| Underpin A Building near Farnham | £41 | £276 |
| Underpin A Building near Newbury | £37 | £262 |
| Underpin A Building near Reading | £42 | £266 |
| Underpin A Building near Sandhurst | £41 | £283 |
| Underpin A Building near Aldershot | £41 | £275 |
| Underpin A Building near Farnborough | £41 | £273 |
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 - £17,677

Two storey extension - £88,265

Build a timber frame extension - £26,177

Build a swimming pool - £81,177

Single storey extension - £58,536

Side return extension - £43,489

Install an RSJ - £2,377

Outbuilding - £10,177

Build a Mansard loft conversion - £52,177

Loft conversion - £35,408

Build a kitchen extension - £42,177

Hip to gable loft conversion - £42,177

Granny annexe - £87,177

Garden office - £10,177

Convert a Garage - £16,177

Garage - £18,677

Build a flat roof extension - £22,177

Build a dormer loft conversion - £42,177

Concrete foundations - £6,427

Convert a bungalow loft - £29,177

Convert a basement - £39,489