From £17,372
Need to find an Extension Builder near you for all your extension buildering work?
CRS Roofing provides a local, trusted extension builderi...
From £17,612
Relax... you have found a reliable extension builder in RG4. P Stelling General Builders is a friendly and reliable company based in RG4 who consid...
From £17,708
Experienced extension builder ready to quote for your work. PV James Construction Ltd is the best extension builder in RG4. No obligation free quot...
From £17,580
Scanlan Interiors is an established, independent, family run Home Improvement business based in Caversham, Reading, in Berkshire. We specialise in ...
From £17,588
A Sainsbury Builder and Property Maintenance Ltd are here to help customers who need an Extension Builder in RG4. We offer a competitive rate to co...
From £17,612
Houseline Construction Ltd is a trusted extension builder serving customers in RG4 and the surrounding area. Contact us to today to get a competiti...
From £17,460
Trusted and professional extension builder in RG4. Experienced in all extension buildering work and keeping within budget and on quote. Wise Roofin...
From £17,932
Christina meyer property ltd is a trusted extension builder serving customers in RG4 and the surrounding area. Contact us to today to get a competi...
From £17,972
Experienced extension builder ready to quote for your work. Inspiral is the best extension builder in RG4. No obligation free quotes and many happy...
From £17,476
J.L Building Services are here to help customers who need an Extension Builder in RG4. We offer a competitive rate to complete all your extension b...

Underpinning ranges from £17,372 (CRS Roofing based in RG4) to £17,972 (Inspiral based in RG30), 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 RG4 by posting a job with HaMuch and we will send it to extension builders in RG4.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Caversham | £38 | £266 |
| Underpin A Building near Reading | £42 | £266 |
| Underpin A Building near Woodley | £42 | £267 |
| Underpin A Building near Wokingham | £41 | £280 |
| Underpin A Building near Bracknell Forest | £41 | £287 |
| Underpin A Building near Bracknell | £41 | £286 |
| Underpin A Building near Maidenhead | £41 | £273 |
| Underpin A Building near Sandhurst | £41 | £283 |
| Underpin A Building near South Oxfordshire | £36 | £253 |
| Underpin A Building near Wycombe | £39 | £271 |
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 - £17,631

Two storey extension - £88,197

Build a timber frame extension - £26,131

Build a swimming pool - £81,131

Single storey extension - £57,624

Side return extension - £42,976

Install an RSJ - £2,331

Outbuilding - £10,131

Build a Mansard loft conversion - £52,131

Loft conversion - £34,980

Build a kitchen extension - £42,131

Hip to gable loft conversion - £42,131

Granny annexe - £87,131

Garden office - £10,131

Convert a Garage - £16,131

Garage - £18,631

Build a flat roof extension - £22,131

Build a dormer loft conversion - £42,131

Concrete foundations - £6,381

Convert a bungalow loft - £29,131

Convert a basement - £38,976