Relax... you have found a reliable extension builder in SN10. Lee Jackson Roofing Ltd is a friendly and reliable company based in SN10 who consider...
From £17,396
Our building services company TG Roofing and Construction was established over 10 years ago and have been helping customers throughout Wiltshire by...
From £17,652
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £17,252 (Lee Jackson Roofing Ltd based in SN10) to £17,652 (Ayelle Construction Ltd based in SN10), 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 SN10 by posting a job with HaMuch and we will send it to extension builders in SN10.
"Underpinning" - WEST WILTSHIRE, job posted 09/12/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Devizes | £32 | £242 |
| Underpin A Building near North Wiltshire | £32 | £242 |
| Underpin A Building near West Wiltshire | £32 | £242 |
| Underpin A Building near Calne | £29 | £225 |
| Underpin A Building near Trowbridge | £34 | £266 |
| Underpin A Building near Chippenham | £34 | £258 |
| Underpin A Building near Frome | £33 | £263 |
| Underpin A Building near Swindon | £31 | £238 |
| Underpin A Building near Thamesdown | £31 | £239 |
| Underpin A Building near Stratton St Margaret | £32 | £238 |
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 - £17,433

Two storey extension - £87,900

Build a timber frame extension - £25,933

Build a swimming pool - £80,933

Single storey extension - £53,667

Side return extension - £40,750

Install an RSJ - £2,133

Outbuilding - £9,933

Build a Mansard loft conversion - £51,933

Loft conversion - £33,125

Build a kitchen extension - £41,933

Hip to gable loft conversion - £41,933

Granny annexe - £86,933

Garden office - £9,933

Convert a Garage - £15,933

Garage - £18,433

Build a flat roof extension - £21,933

Build a dormer loft conversion - £41,933

Concrete foundations - £6,183

Convert a bungalow loft - £28,933

Convert a basement - £36,750