WEYMOUTH ROOFING CO. is an established and experienced local extension builder in Dorchester. Please contact us for a free, no obligation quote and...
From £17,692
Need to find an Extension Builder near you for all your extension buildering work?
J FLANN BUILDING & MAINTENANCE provides a local, trusted...
From £17,396
Dorchester, DT1
Steven Clark Building Services is an established and experienced local extension builder in Dorchester. Please contact us for a free, no obligation...
From £17,532
Design Properties & Renovations is an established and experienced local extension builder in Dorchester. Please contact us for a free, no obligatio...
From £18,036
Our building services company Roofix and Build Ltd have twenty years experience of helping customers in Weymouth and the surrounding area by provid...
From £17,508
We are a small business priding oueselves on high quality works carried out with care and attention. We use a select few subcontractors to help com...
From £16,996
Richard Gracie
Dorchester, DT2
We are Dorset Build & Maintenance Company Ltd. We are a medium sized local building and maintenance contractor, and our work area is prima...
From £17,196
Stuart Lambert
Trusted and professional extension builder in Dorchester. Experienced in all extension buildering work and keeping within budget and on quote. Stua...
From £17,860
BUILDCRAFT CONSTRUCTION LTD is an established and experienced local extension builder in Dorchester. Please contact us for a free, no obligation qu...
From £17,060
Joanne Upshall
Dorchester, DT1
We are a locl fun family business with over 20 years experience. We specialise in all aspects of the building trade, no job too big or too sm...

Underpinning ranges from £16,972 (WEYMOUTH ROOFING CO. based in DT4) to £18,036 (Roofix and Build Ltd based in DT4), 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 Dorchester by posting a job with HaMuch and we will send it to extension builders in Dorchester.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Dorchester | £30 | £230 |
| Underpin A Building near Weymouth | £33 | £260 |
| Underpin A Building near Yeovil | £34 | £294 |
| Underpin A Building near Poole | £38 | £250 |
| Underpin A Building near South Somerset | £62 | £270 |
| Underpin A Building near Bournemouth | £38 | £257 |
| Underpin A Building near Taunton | £31 | £242 |
| Underpin A Building near Salisbury | £35 | £247 |
| 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 - £17,425

Two storey extension - £87,887

Build a timber frame extension - £25,925

Build a swimming pool - £80,925

Single storey extension - £53,496

Side return extension - £40,654

Install an RSJ - £2,125

Outbuilding - £9,925

Build a Mansard loft conversion - £51,925

Loft conversion - £33,045

Build a kitchen extension - £41,925

Hip to gable loft conversion - £41,925

Granny annexe - £86,925

Garden office - £9,925

Convert a Garage - £15,925

Garage - £18,425

Build a flat roof extension - £21,925

Build a dormer loft conversion - £41,925

Concrete foundations - £6,175

Convert a bungalow loft - £28,925

Convert a basement - £36,654