From £17,548
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in RH7. No obligation free quotes ...
From £18,524
Buci builders ltd is a trusted extension builder serving customers in RH7 and the surrounding area. Contact us to today to get a competitive quote ...
From £17,692
Gb construction are here to help customers who need an Extension Builder in RH7. We offer a competitive rate to complete all your extension builde...
From £18,700
Member since August 2025
Banga decoration. Is Base in south London for number of year Banga decoration is a small company. Wich provide an excellent job to the custom...
From £17,660
Homeowners look no further if you want a qualified extension builder to work in your home. LCD Pixel Construction Ltd are tidy and neat, providing ...
From £17,828
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,420
Masonic Plumbing and Heating Ltd are here to help customers who need an Extension Builder in RH7. We offer a competitive rate to complete all your ...
From £17,772
Need to find an Extension Builder near you for all your extension buildering work?
DPP Construction (David Price Partnership) provides a lo...
From £17,764
Trusted and professional extension builder in RH7. Experienced in all extension buildering work and keeping within budget and on quote. RR'S Builde...
From £17,924
Experienced extension builder ready to quote for your work. Claudiu Mihaila is the best extension builder in RH7. No obligation free quotes and man...

Underpinning ranges from £17,420 (Masonic Plumbing and Heating Ltd based in BR2) to £18,700 (Banga Decoration based in CR7), 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 RH7 by posting a job with HaMuch and we will send it to extension builders in RH7.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near East Grinstead | £37 | £259 |
| Underpin A Building near Horley | £38 | £258 |
| Underpin A Building near Crawley | £38 | £255 |
| Underpin A Building near Caterham | £43 | £272 |
| Underpin A Building near Redhill | £41 | £269 |
| Underpin A Building near Reigate | £40 | £270 |
| Underpin A Building near Mid Sussex | £35 | £261 |
| Underpin A Building near Sevenoaks | £38 | £234 |
| Underpin A Building near Reigate & Banstead | £41 | £271 |
| Underpin A Building near Crowborough | £36 | £258 |
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 - £17,883

Two storey extension - £88,575

Build a timber frame extension - £26,383

Build a swimming pool - £81,383

Single storey extension - £62,664

Side return extension - £45,811

Install an RSJ - £2,583

Outbuilding - £10,383

Build a Mansard loft conversion - £52,383

Loft conversion - £37,343

Build a kitchen extension - £42,383

Hip to gable loft conversion - £42,383

Granny annexe - £87,383

Garden office - £10,383

Convert a Garage - £16,383

Garage - £18,883

Build a flat roof extension - £22,383

Build a dormer loft conversion - £42,383

Concrete foundations - £6,633

Convert a bungalow loft - £29,383

Convert a basement - £41,811