From £18,044
GARY G BOND LIMITED are here to help customers who need an Extension Builder in Downend. We offer a competitive rate to complete all your extension...
From £17,420
Relax... you have found a reliable extension builder in Downend. RD Pope Construction is a friendly and reliable company based in Downend who consi...
From £17,356
Downend, BS16
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,268
Trusted and professional extension builder in Downend. Experienced in all extension buildering work and keeping within budget and on quote. Jeremy ...
From £17,708
FEATHERBED CONSTRUCTION is a trusted extension builder serving customers in Downend and the surrounding area. Contact us to today to get a competit...
From £17,228
Neil Causon & Son is an established and experienced local extension builder in Downend. Please contact us for a free, no obligation quote and compe...
From £17,340
MOORLAND DESIGN & BUILD LTD are here to help customers who need an Extension Builder in Downend. We offer a competitive rate to complete all your e...
From £17,580
Downend, BS16
HYATT BUILDING SERVICES are here to help customers who need an Extension Builder in Downend. We offer a competitive rate to complete all your exten...
From £17,692
B ROBINSON BUILDING is an established and experienced local extension builder in Downend. Please contact us for a free, no obligation quote and com...
From £17,748
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £17,228 (Neil Causon & Son based in BS21) to £18,044 (GARY G BOND LIMITED based in BS16), 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 Downend by posting a job with HaMuch and we will send it to extension builders in Downend.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Kingswood | £34 | £257 |
| Underpin A Building near South Gloucestershire | £34 | £260 |
| Underpin A Building near Bristol | £33 | £255 |
| Underpin A Building near Bradley Stoke | £34 | £259 |
| Underpin A Building near Clifton | £33 | £255 |
| Underpin A Building near Keynsham | £33 | £251 |
| Underpin A Building near Yate | £34 | £263 |
| Underpin A Building near Portishead | £33 | £247 |
| Underpin A Building near Bath | £32 | £249 |
| Underpin A Building near North Somerset | £32 | £245 |
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 - £17,538

Two storey extension - £88,058

Build a timber frame extension - £26,038

Build a swimming pool - £81,038

Single storey extension - £55,768

Side return extension - £41,932

Install an RSJ - £2,238

Outbuilding - £10,038

Build a Mansard loft conversion - £52,038

Loft conversion - £34,110

Build a kitchen extension - £42,038

Hip to gable loft conversion - £42,038

Granny annexe - £87,038

Garden office - £10,038

Convert a Garage - £16,038

Garage - £18,538

Build a flat roof extension - £22,038

Build a dormer loft conversion - £42,038

Concrete foundations - £6,288

Convert a bungalow loft - £29,038

Convert a basement - £37,932