Chris Czerwinski
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Underpinning ranges from £17,532 (GREENWORKS CONSTRUCTION based in SL7) to £17,892 (Jesson ladscaping and construction based in hp15), 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 High Wycombe by posting a job with HaMuch and we will send it to extension builders in High Wycombe.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near High Wycombe | £39 | £272 |
| Underpin A Building near Wycombe | £39 | £271 |
| Underpin A Building near Hazlemere | £40 | £272 |
| Underpin A Building near Maidenhead | £41 | £273 |
| Underpin A Building near Chesham | £42 | £277 |
| Underpin A Building near Gerrards Cross | £43 | £282 |
| Underpin A Building near Slough | £42 | £272 |
| Underpin A Building near Windsor & Maidenhead | £42 | £272 |
| Underpin A Building near Windsor | £41 | £271 |
| Underpin A Building near Rickmansworth | £42 | £278 |
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 - £17,703

Two storey extension - £88,305

Build a timber frame extension - £26,203

Build a swimming pool - £81,203

Single storey extension - £59,064

Side return extension - £43,786

Install an RSJ - £2,403

Outbuilding - £10,203

Build a Mansard loft conversion - £52,203

Loft conversion - £35,655

Build a kitchen extension - £42,203

Hip to gable loft conversion - £42,203

Granny annexe - £87,203

Garden office - £10,203

Convert a Garage - £16,203

Garage - £18,703

Build a flat roof extension - £22,203

Build a dormer loft conversion - £42,203

Concrete foundations - £6,453

Convert a bungalow loft - £29,203

Convert a basement - £39,786