From £17,588
Landhaven Homes are here to help customers who need an Extension Builder in BS9. We offer a competitive rate to complete all your extension builder...
From £17,396
Maple Construction and Design LTD is an established extension buildering business in BS9. We come highly recommended and provide competitive quotes...
From £17,532
Need an Extension Builder in BS9? Ashford Design and Build Limited has been helping local clients (20 mile radius) with their extension buildering ...
From £17,460
Relax... you have found a reliable extension builder in BS9. Greenhorn Homes is a friendly and reliable company based in BS9 who consider no job as...
From £17,340
The Good Building Company Limited are here to help customers who need an Extension Builder in BS9. We offer a competitive rate to complete all your...
From £17,732
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,572
We are an experienced and trusted Bristol based building and renovations company, covering all aspects of small to large domestic projects. Bathroo...
From £17,540
Relax... you have found a reliable extension builder in BS9. Moon DESIGN is a friendly and reliable company based in BS9 who consider no job as too...
From £17,796
N J Laity & Son & Grandson's are here to help customers who need an Extension Builder in BS9. We offer a competitive rate to complete all your exte...
From £17,396
Home By Design Ltd is a trusted extension builder serving customers in BS9 and the surrounding area. Contact us to today to get a competitive quote...

Underpinning ranges from £17,340 (The Good Building Company Limited based in BS9) to £17,796 (N J Laity & Son & Grandson's based in BS10), 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 BS9 by posting a job with HaMuch and we will send it to extension builders in BS9.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Clifton | £33 | £255 |
| Underpin A Building near Bristol | £33 | £255 |
| Underpin A Building near Bradley Stoke | £34 | £259 |
| Underpin A Building near Portishead | £33 | £247 |
| Underpin A Building near Kingswood | £34 | £257 |
| Underpin A Building near South Gloucestershire | £34 | £260 |
| Underpin A Building near Keynsham | £33 | £251 |
| Underpin A Building near North Somerset | £32 | £245 |
| Underpin A Building near Yate | £34 | £263 |
| Underpin A Building near Clevedon | £32 | £243 |
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 - £17,535

Two storey extension - £88,053

Build a timber frame extension - £26,035

Build a swimming pool - £81,035

Single storey extension - £55,704

Side return extension - £41,896

Install an RSJ - £2,235

Outbuilding - £10,035

Build a Mansard loft conversion - £52,035

Loft conversion - £34,080

Build a kitchen extension - £42,035

Hip to gable loft conversion - £42,035

Granny annexe - £87,035

Garden office - £10,035

Convert a Garage - £16,035

Garage - £18,535

Build a flat roof extension - £22,035

Build a dormer loft conversion - £42,035

Concrete foundations - £6,285

Convert a bungalow loft - £29,035

Convert a basement - £37,896