From £17,684
ARTISAN BUILDING SERVICES LTD are here to help customers who need an Extension Builder in BS13. We offer a competitive rate to complete all your ex...
From £17,412
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,660
Need an Extension Builder in BS13? BMH BUILDING SERVICES has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £17,380
Looking for an Extension Builder near BS13 for all your extension buildering jobs?
Piotr Building & Decorations provi...
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 £17,748
Paskell Construction is an established and experienced local extension builder in BS13. Please contact us for a free, no obligation quote and compe...
From £17,348
BROWN BUILDERS is a trusted extension builder serving customers in BS13 and the surrounding area. Contact us to today to get a competitive quote fo...
From £17,324
S M Building & Roofing (sw) LImitef are a leading provider of general building services and other planned and reactive maintenance, covering th...
From £17,324
MAKE is an established extension buildering business in BS13. We come highly recommended and provide competitive quotes for your work.
From £17,668
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £17,324 (S M Building & Roofing (SW) Limited based in BS13) to £17,748 (Paskell Construction based in BS13), 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 BS13 by posting a job with HaMuch and we will send it to extension builders in BS13.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Bristol | £33 | £255 |
| Underpin A Building near Clifton | £33 | £255 |
| Underpin A Building near Keynsham | £33 | £251 |
| Underpin A Building near Kingswood | £34 | £257 |
| Underpin A Building near North Somerset | £32 | £245 |
| Underpin A Building near Portishead | £33 | £247 |
| Underpin A Building near Bath | £32 | £249 |
| Underpin A Building near Bradley Stoke | £34 | £259 |
| Underpin A Building near South Gloucestershire | £34 | £260 |
| 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 - £17,528

Two storey extension - £88,042

Build a timber frame extension - £26,028

Build a swimming pool - £81,028

Single storey extension - £55,560

Side return extension - £41,815

Install an RSJ - £2,228

Outbuilding - £10,028

Build a Mansard loft conversion - £52,028

Loft conversion - £34,013

Build a kitchen extension - £42,028

Hip to gable loft conversion - £42,028

Granny annexe - £87,028

Garden office - £10,028

Convert a Garage - £16,028

Garage - £18,528

Build a flat roof extension - £22,028

Build a dormer loft conversion - £42,028

Concrete foundations - £6,278

Convert a bungalow loft - £29,028

Convert a basement - £37,815