From £17,396
Need an Extension Builder in TR11? Cloverfield Construction Ltd has been helping local clients (20 mile radius) with their extension buildering job...
From £17,252
Jackson Developments provides an affordable, quality service for customers across Cornwall.We undertake all aspects of building work and can manage...
From £17,292
Need to find an Extension Builder near you for all your extension buildering work?
Samuel Winn Design & Build provides a local, trusted ext...
From £17,244
Trusted and professional extension builder in TR11. Experienced in all extension buildering work and keeping within budget and on quote. Jo Tracey ...
From £17,284
Need to find an Extension Builder near you for all your extension buildering work?
KPK Builders Ltd provides a local, trusted extension bui...
From £17,060
TR1 Construction Ltd is a one-stop solution for all your extension buildering needs. Establish over 10 years ago and covering 20 miles around TR11 ...
From £16,948
SHORE FIX CONSTRUCTION LTD is an established extension buildering business in TR11. We come highly recommended and provide competitive quotes for y...
From £17,132
J C MITCHELL BUILDERS LTD is a trusted extension builder serving customers in TR11 and the surrounding area. Contact us to today to get a competiti...
From £17,316
Rock Construction is a trusted extension builder serving customers in TR11 and the surrounding area. Contact us to today to get a competitive quote...
From £17,044
Experienced extension builder ready to quote for your work. KEAST CONSTRUCTION LTD is the best extension builder in TR11. No obligation free quotes...

Underpinning ranges from £16,948 (SHORE FIX CONSTRUCTION LTD based in TR12) to £17,396 (Cloverfield Construction Ltd based in TR11), 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 TR11 by posting a job with HaMuch and we will send it to extension builders in TR11.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Falmouth | £33 | £220 |
| Underpin A Building near Truro | £31 | £206 |
| Underpin A Building near Camborne | £28 | £196 |
| Underpin A Building near Newquay | £32 | £230 |
| Underpin A Building near St Ives, Cornwall | £27 | £188 |
| Underpin A Building near St Austell | £38 | £245 |
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 - £17,197

Two storey extension - £87,545

Build a timber frame extension - £25,697

Build a swimming pool - £80,697

Single storey extension - £48,936

Side return extension - £38,089

Install an RSJ - £1,897

Outbuilding - £9,697

Build a Mansard loft conversion - £51,697

Loft conversion - £30,908

Build a kitchen extension - £41,697

Hip to gable loft conversion - £41,697

Granny annexe - £86,697

Garden office - £9,697

Convert a Garage - £15,697

Garage - £18,197

Build a flat roof extension - £21,697

Build a dormer loft conversion - £41,697

Concrete foundations - £5,947

Convert a bungalow loft - £28,697

Convert a basement - £34,089