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From £21,440
We are a family run Construction Company based in Penzance. We employ over 10 skilled local trade professionals with 2 apprentices as well. Residen...

A flat roof extension ranges from the cheapest of £21,440 (TGP Construction based in TR18) to the dearest of £21,440 (TGP Construction based in TR18), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in St Ives, Cornwall by posting a job with HaMuch. We'll send it to extension builders in St Ives, Cornwall.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near St Ives, Cornwall | £27 | £188 |
| Build A Flat Roof Extension near Camborne | £28 | £196 |
| Build A Flat Roof Extension near Falmouth | £33 | £220 |
| Build A Flat Roof Extension near Truro | £31 | £206 |
| Build A Flat Roof Extension near Newquay | £32 | £230 |
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 - £16,940

Two storey extension - £87,160

Build a timber frame extension - £25,440

Build a swimming pool - £80,440

Single storey extension - £43,800

Side return extension - £35,200

Install an RSJ - £1,640

Outbuilding - £9,440

Build a Mansard loft conversion - £51,440

Loft conversion - £28,500

Build a kitchen extension - £41,440

Hip to gable loft conversion - £41,440

Granny annexe - £86,440

Garden office - £9,440

Convert a Garage - £15,440

Garage - £17,940

Build a flat roof extension - £21,440

Build a dormer loft conversion - £41,440

Concrete foundations - £5,690

Convert a bungalow loft - £28,440

Convert a basement - £31,200