From £22,336
A complete building service based in the Isle of Purbeck, Dorset. Campbell Clarke Construction are an established, experienced and trusted building...

A flat roof extension ranges from the cheapest of £22,336 (Campbell Clarke Construction LTD based in BH20) to the dearest of £22,336 (Campbell Clarke Construction LTD based in BH20), 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 BH20 by posting a job with HaMuch. We'll send it to extension builders in BH20.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Poole | £38 | £250 |
| Build A Flat Roof Extension near Bournemouth | £38 | £257 |
| Build A Flat Roof Extension near Dorchester | £30 | £230 |
| Build A Flat Roof Extension near Weymouth | £33 | £260 |
| Build A Flat Roof Extension near Christchurch | £36 | £251 |
| Build A Flat Roof Extension near New Forest | £32 | £245 |
| Build A Flat Roof Extension near Yeovil | £34 | £294 |
| Build A Flat Roof Extension near Salisbury | £35 | £247 |
| Build A Flat Roof Extension near Totton | £34 | £243 |
| Build A Flat Roof Extension near South Somerset | £62 | £270 |
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 - £17,836

Two storey extension - £88,504

Build a timber frame extension - £26,336

Build a swimming pool - £81,336

Single storey extension - £61,720

Side return extension - £45,280

Install an RSJ - £2,536

Outbuilding - £10,336

Build a Mansard loft conversion - £52,336

Loft conversion - £36,900

Build a kitchen extension - £42,336

Hip to gable loft conversion - £42,336

Granny annexe - £87,336

Garden office - £10,336

Convert a Garage - £16,336

Garage - £18,836

Build a flat roof extension - £22,336

Build a dormer loft conversion - £42,336

Concrete foundations - £6,586

Convert a bungalow loft - £29,336

Convert a basement - £41,280