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 £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 £17,516
Dorset Showhomes Ltd is an established extension buildering business in DT3. We come highly recommended and provide competitive quotes for your wor...
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 £18,036
Chris Larner building services is a trusted extension builder serving customers in DT3 and the surrounding area. Contact us to today to get a compe...
From £17,548
DM Building & Property Maintenance is a trusted extension builder serving customers in DT3 and the surrounding area. Contact us to today to get a c...
From £17,860
BUILDCRAFT CONSTRUCTION LTD is an established and experienced local extension builder in DT3. Please contact us for a free, no obligation quote and...
From £16,972
WEYMOUTH ROOFING CO. is an established and experienced local extension builder in DT3. Please contact us for a free, no obligation quote and compet...
From £17,532
Design Properties & Renovations is an established and experienced local extension builder in DT3. Please contact us for a free, no obligation quote...
From £17,644
Weymouth based property Investment and Re-development: Upcycling discarded materials to provide bespoke interior refurbishments, full property reno...

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 DT3 by posting a job with HaMuch and we will send it to extension builders in DT3.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Weymouth | £28 | £221 |
| Underpin A Building near Dorchester | £26 | £201 |
| Underpin A Building near Poole | £33 | £215 |
| Underpin A Building near Yeovil | £28 | £242 |
| Underpin A Building near Bournemouth | £33 | £221 |
| Underpin A Building near South Somerset | £48 | £208 |
| Underpin A Building near Taunton | £27 | £208 |
| Underpin A Building near Salisbury | £30 | £211 |
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 - £17,634

Two storey extension - £88,202

Build a timber frame extension - £26,134

Build a swimming pool - £81,134

Single storey extension - £57,688

Side return extension - £43,012

Install an RSJ - £2,334

Outbuilding - £10,134

Build a Mansard loft conversion - £52,134

Loft conversion - £35,010

Build a kitchen extension - £42,134

Hip to gable loft conversion - £42,134

Granny annexe - £87,134

Garden office - £10,134

Convert a Garage - £16,134

Garage - £18,634

Build a flat roof extension - £22,134

Build a dormer loft conversion - £42,134

Concrete foundations - £6,384

Convert a bungalow loft - £29,134

Convert a basement - £39,012