Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
PORTCLIFF BUILDING SERV LTD is an established extension buildering business in BS22. We come highly recommended and provide competitive quotes for ...
Obsession design and build is a full building services company with an in house team combining extensive experienceand exquisite aspirations. Our t...
From £17,860
Andrew Bishop
We are a medium sized Buisness with a huge reputation for quality workmanship

Underpinning ranges from £17,188 (PORTCLIFF BUILDING SERV LTD based in BS21) to £17,860 (A K BISHOP based in BS24), 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 BS22 by posting a job with HaMuch and we will send it to extension builders in BS22.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Weston-super-Mare | £33 | £253 |
| Underpin A Building near Clevedon | £32 | £243 |
| Underpin A Building near North Somerset | £32 | £245 |
| Underpin A Building near Portishead | £33 | £247 |
| Underpin A Building near Penarth | £35 | £219 |
| Underpin A Building near Cardiff | £34 | £219 |
| Underpin A Building near Clifton | £33 | £255 |
| Underpin A Building near Newport | £41 | £233 |
| Underpin A Building near Bristol | £33 | £255 |
| Underpin A Building near Bridgwater | £30 | £236 |
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 - £17,488

Two storey extension - £87,982

Build a timber frame extension - £25,988

Build a swimming pool - £80,988

Single storey extension - £54,760

Side return extension - £41,365

Install an RSJ - £2,188

Outbuilding - £9,988

Build a Mansard loft conversion - £51,988

Loft conversion - £33,638

Build a kitchen extension - £41,988

Hip to gable loft conversion - £41,988

Granny annexe - £86,988

Garden office - £9,988

Convert a Garage - £15,988

Garage - £18,488

Build a flat roof extension - £21,988

Build a dormer loft conversion - £41,988

Concrete foundations - £6,238

Convert a bungalow loft - £28,988

Convert a basement - £37,365