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Select an affordable extension builder
TR1 Construction Ltd is a one-stop solution for all your extension buildering needs. Establish over 10 years ago and covering 20 miles around TR3 w...
Experienced extension builder ready to quote for your work. KEAST CONSTRUCTION LTD is the best extension builder in TR3. No obligation free quotes ...
From £33,360
J C MITCHELL BUILDERS LTD is a trusted extension builder serving customers in TR3 and the surrounding area. Contact us to today to get a competitiv...
From £35,070
Need to find an Extension Builder near you for all your extension buildering work?
KPK Builders Ltd provides a local, trusted extension bui...
From £34,620
Trusted and professional extension builder in TR3. Experienced in all extension buildering work and keeping within budget and on quote. Jo Tracey C...
From £35,160
Need to find an Extension Builder near you for all your extension buildering work?
Samuel Winn Design & Build provides a local, trusted ext...
From £34,710
Jackson Developments provides an affordable, quality service for customers across Cornwall.We undertake all aspects of building work and can manage...
From £35,430
Rock Construction is a trusted extension builder serving customers in TR3 and the surrounding area. Contact us to today to get a competitive quote ...

Comparing extension builders estimates for a Convert a basement gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost to convert a basement in TR3 by posting a job with HaMuch and we will send it to extension builders in TR3.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Basement near Truro | £31 | £206 |
| Convert A Basement near Falmouth | £33 | £220 |
| Convert A Basement near Camborne | £28 | £196 |
| Convert A Basement near Newquay | £32 | £230 |
| Convert A Basement near St Ives, Cornwall | £27 | £188 |
| Convert A Basement 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 - £17,203

Two storey extension - £87,555

Build a timber frame extension - £25,703

Build a swimming pool - £80,703

Single storey extension - £49,060

Side return extension - £38,159

Install an RSJ - £1,903

Outbuilding - £9,703

Build a Mansard loft conversion - £51,703

Loft conversion - £30,966

Build a kitchen extension - £41,703

Hip to gable loft conversion - £41,703

Granny annexe - £86,703

Garden office - £9,703

Convert a Garage - £15,703

Garage - £18,203

Build a flat roof extension - £21,703

Build a dormer loft conversion - £41,703

Concrete foundations - £5,953

Convert a bungalow loft - £28,703

Convert a basement - £34,159