From £21,896
Need an Extension Builder in TR11? Cloverfield Construction Ltd has been helping local clients (20 mile radius) with their extension buildering job...
From £21,752
Jackson Developments provides an affordable, quality service for customers across Cornwall.We undertake all aspects of building work and can manage...
From £21,792
Need to find an Extension Builder near you for all your extension buildering work?
Samuel Winn Design & Build provides a local, trusted ext...

A flat roof extension ranges from the cheapest of £21,752 (Jackson Developments based in TR10) to the dearest of £21,896 (Cloverfield Construction Ltd based in TR11), 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 TR11 by posting a job with HaMuch. We'll send it to extension builders in TR11.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Falmouth | £33 | £220 |
| Build A Flat Roof Extension near Truro | £31 | £206 |
| Build A Flat Roof Extension near Camborne | £28 | £196 |
| Build A Flat Roof Extension near Newquay | £32 | £230 |
| Build A Flat Roof Extension near St Ives, Cornwall | £27 | £188 |
| Build A Flat Roof Extension 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 - £17,313

Two storey extension - £87,720

Build a timber frame extension - £25,813

Build a swimming pool - £80,813

Single storey extension - £51,267

Side return extension - £39,400

Install an RSJ - £2,013

Outbuilding - £9,813

Build a Mansard loft conversion - £51,813

Loft conversion - £32,000

Build a kitchen extension - £41,813

Hip to gable loft conversion - £41,813

Granny annexe - £86,813

Garden office - £9,813

Convert a Garage - £15,813

Garage - £18,313

Build a flat roof extension - £21,813

Build a dormer loft conversion - £41,813

Concrete foundations - £6,063

Convert a bungalow loft - £28,813

Convert a basement - £35,400