From £17,500
MID Construct is an established and experienced local extension builder in Malmesbury. Please contact us for a free, no obligation quote and compe...
From £17,300
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,460
Deadsmooth Plastering & Building Co is a trusted extension builder serving customers in Malmesbury and the surrounding area. Contact us to today to...
From £17,500
L&P Developments Ltd is an established and experienced local extension builder in Malmesbury. Please contact us for a free, no obligation quote an...
From £17,684
Need to find an Extension Builder near you for all your extension buildering work?
WILSONS BUILDERS CO LTD provides a local, trusted extens...
From £17,276
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,684
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,652
Prestige Build Services LTD is a trusted extension builder serving customers in Malmesbury and the surrounding area. Contact us to today to get a c...
From £17,036
Need an Extension Builder in Malmesbury? R PEARCE BUILDING has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £17,596
MJ solutions is an established and experienced local extension builder in Malmesbury. Please contact us for a free, no obligation quote and compet...

Underpinning ranges from £17,036 (R PEARCE BUILDING based in SN15) to £17,684 (WILSONS BUILDERS CO LTD based in GL12), 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 Malmesbury by posting a job with HaMuch and we will send it to extension builders in Malmesbury.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Chippenham | £34 | £258 |
| Underpin A Building near Calne | £29 | £225 |
| Underpin A Building near Stroud | £33 | £249 |
| Underpin A Building near Thamesdown | £38 | £239 |
| Underpin A Building near Swindon | £38 | £238 |
| Underpin A Building near Stratton St Margaret | £37 | £238 |
| Underpin A Building near Yate | £34 | £263 |
| Underpin A Building near South Gloucestershire | £34 | £260 |
| Underpin A Building near North Wiltshire | £32 | £242 |
| Underpin A Building near West Wiltshire | £32 | £242 |
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 - £17,469

Two storey extension - £87,953

Build a timber frame extension - £25,969

Build a swimming pool - £80,969

Single storey extension - £54,376

Side return extension - £41,149

Install an RSJ - £2,169

Outbuilding - £9,969

Build a Mansard loft conversion - £51,969

Loft conversion - £33,458

Build a kitchen extension - £41,969

Hip to gable loft conversion - £41,969

Granny annexe - £86,969

Garden office - £9,969

Convert a Garage - £15,969

Garage - £18,469

Build a flat roof extension - £21,969

Build a dormer loft conversion - £41,969

Concrete foundations - £6,219

Convert a bungalow loft - £28,969

Convert a basement - £37,149