Brian
Prestige Build Services LTD is a trusted extension builder serving customers in SN2 and the surrounding area. Contact us to today to get a competit...
Jaroslaw Garbacz
MJ solutions is an established and experienced local extension builder in SN2. Please contact us for a free, no obligation quote and competitive r...
Tom Dunn
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
John Howell
MR HOWELL are here to help customers who need an Extension Builder in SN2. We offer a competitive rate to complete all your extension buildering jo...
A D BUILDING SERVICES T/A is a trusted extension builder serving customers in SN2 and the surrounding area. Contact us to today to get a competitiv...
We have a skilled and dedicated team of professional tradesmen to carry out all your requirements. Whether you are looking to build, extend or upgr...
Bob Watts
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
CORE CONSTRUCTION is an established extension buildering business in SN2. We come highly recommended and provide competitive quotes for your work.<...
ABC Builders is a trusted extension builder serving customers in SN2 and the surrounding area. Contact us to today to get a competitive quote for e...
Relax... you have found a reliable extension builder in SN2. Highworth Felt Roofing Limited is a friendly and reliable company based in SN2 who con...

Underpinning ranges from £16,956 (Watts Builders based in SN25) to £17,652 (Prestige Build Services LTD based in SN5), 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 SN2 by posting a job with HaMuch and we will send it to extension builders in SN2.
"Underpin a building" - SN3, job posted 09/05/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Stratton St Margaret | £32 | £238 |
| Underpin A Building near Swindon | £31 | £238 |
| Underpin A Building near Thamesdown | £31 | £239 |
| Underpin A Building near Vale of White Horse | £36 | £271 |
| Underpin A Building near Calne | £29 | £225 |
| Underpin A Building near West Wiltshire | £32 | £242 |
| Underpin A Building near North Wiltshire | £32 | £242 |
| Underpin A Building near Devizes | £32 | £242 |
| Underpin A Building near Witney | £32 | £244 |
| Underpin A Building near Chippenham | £34 | £258 |
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 - £17,334

Two storey extension - £87,750

Build a timber frame extension - £25,834

Build a swimming pool - £80,834

Single storey extension - £51,672

Side return extension - £39,628

Install an RSJ - £2,034

Outbuilding - £9,834

Build a Mansard loft conversion - £51,834

Loft conversion - £32,190

Build a kitchen extension - £41,834

Hip to gable loft conversion - £41,834

Granny annexe - £86,834

Garden office - £9,834

Convert a Garage - £15,834

Garage - £18,334

Build a flat roof extension - £21,834

Build a dormer loft conversion - £41,834

Concrete foundations - £6,084

Convert a bungalow loft - £28,834

Convert a basement - £35,628