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Select your affordable Castleton extension builder
Need to find an Extension Builder near you for all your extension buildering work?
Neil Massey Roofing Contractor provides a local, trusted...
Hraham Evans
Firestone Surfacing Ltd is a trusted extension builder serving customers in Castleton and the surrounding area. Contact us to today to get a compet...
From £22,400
Castleton, DT9
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,160
Need an Extension Builder in Castleton? Morris Concrete Designs has been helping local clients (20 mile radius) with their extension buildering job...

A flat roof extension ranges from the cheapest of £21,856 (Firestone Surfacing Ltd based in BA21) to the dearest of £23,096 (Neil Massey Roofing Contractor based in BA21), 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 Castleton by posting a job with HaMuch. We'll send it to extension builders in Castleton.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Yeovil | £34 | £294 |
| Build A Flat Roof Extension near South Somerset | £62 | £270 |
| Build A Flat Roof Extension near Dorchester | £30 | £230 |
| Build A Flat Roof Extension near Weymouth | £33 | £260 |
| Build A Flat Roof Extension near Frome | £33 | £263 |
| Build A Flat Roof Extension near Bridgwater | £30 | £236 |
| Build A Flat Roof Extension near Taunton | £31 | £242 |
| Build A Flat Roof Extension near Bath | £32 | £249 |
| Build A Flat Roof Extension near Poole | £38 | £250 |
| Build A Flat Roof Extension near Trowbridge | £34 | £266 |
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 - £17,878

Two storey extension - £88,567

Build a timber frame extension - £26,378

Build a swimming pool - £81,378

Single storey extension - £62,560

Side return extension - £45,753

Install an RSJ - £2,578

Outbuilding - £10,378

Build a Mansard loft conversion - £52,378

Loft conversion - £37,294

Build a kitchen extension - £42,378

Hip to gable loft conversion - £42,378

Granny annexe - £87,378

Garden office - £10,378

Convert a Garage - £16,378

Garage - £18,878

Build a flat roof extension - £22,378

Build a dormer loft conversion - £42,378

Concrete foundations - £6,628

Convert a bungalow loft - £29,378

Convert a basement - £41,753