From £17,260
Dacol Services is Swindons number 1 property maintenance service.
Trusted by many letting agents, landlords, homeowners, and hoteliers.
From £17,324
R & R BUILDERS is an established and experienced local extension builder in SN2. Please contact us for a free, no obligation quote and competitive ...
From £17,180
Trusted and professional extension builder in SN2. Experienced in all extension buildering work and keeping within budget and on quote. G R & Son h...
From £17,196
CORE CONSTRUCTION is an established extension buildering business in SN2. We come highly recommended and provide competitive quotes for your work.<...
From £17,420
Complete Driveway Solutions is an established and experienced local extension builder in SN2. Please contact us for a free, no obligation quote and...
From £17,388
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...
From £17,372
Craig Donnelly Building Contractors Ltd is a trusted extension builder serving customers in SN2 and the surrounding area. Contact us to today to ge...
From £16,956
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,572
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...
From £17,812
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £16,956 (Watts Builders based in SN25) to £17,812 (The trade collective ltd based in Sn1), 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.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Stratton St Margaret | £37 | £238 |
| Underpin A Building near Swindon | £38 | £238 |
| Underpin A Building near Thamesdown | £38 | £239 |
| Underpin A Building near Vale of White Horse | £36 | £271 |
| Underpin A Building near Calne | £29 | £225 |
| Underpin A Building near North Wiltshire | £32 | £242 |
| Underpin A Building near West 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 - £17,348

Two storey extension - £87,772

Build a timber frame extension - £25,848

Build a swimming pool - £80,848

Single storey extension - £51,960

Side return extension - £39,790

Install an RSJ - £2,048

Outbuilding - £9,848

Build a Mansard loft conversion - £51,848

Loft conversion - £32,325

Build a kitchen extension - £41,848

Hip to gable loft conversion - £41,848

Granny annexe - £86,848

Garden office - £9,848

Convert a Garage - £15,848

Garage - £18,348

Build a flat roof extension - £21,848

Build a dormer loft conversion - £41,848

Concrete foundations - £6,098

Convert a bungalow loft - £28,848

Convert a basement - £35,790