From £22,112
Need to find an Extension Builder near you for all your extension buildering work?
J Pearson Building provides a local, trusted extension b...
From £21,864
Nestled in the rolling hillside of the West Midlands, Derby is a city birthed by the Roman Empire, and grown in the industrial revolution. Initiall...

A flat roof extension ranges from the cheapest of £21,864 (Refresh Renovations Derbyshire based in DE73) to the dearest of £22,112 (J Pearson Building based in DE24), 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 DE73 by posting a job with HaMuch. We'll send it to extension builders in DE73.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Derby | £29 | £227 |
| Build A Flat Roof Extension near Swadlincote | £32 | £249 |
| Build A Flat Roof Extension near Long Eaton | £32 | £249 |
| Build A Flat Roof Extension near Erewash | £31 | £234 |
| Build A Flat Roof Extension near Moira | £29 | £222 |
| Build A Flat Roof Extension near Burton upon Trent | £33 | £257 |
| Build A Flat Roof Extension near Coalville | £32 | £242 |
| Build A Flat Roof Extension near Ilkeston | £31 | £236 |
| Build A Flat Roof Extension near Loughborough | £32 | £262 |
| Build A Flat Roof Extension near Amber Valley | £32 | £244 |
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 - £17,488

Two storey extension - £87,982

Build a timber frame extension - £25,988

Build a swimming pool - £80,988

Single storey extension - £54,760

Side return extension - £41,365

Install an RSJ - £2,188

Outbuilding - £9,988

Build a Mansard loft conversion - £51,988

Loft conversion - £33,638

Build a kitchen extension - £41,988

Hip to gable loft conversion - £41,988

Granny annexe - £86,988

Garden office - £9,988

Convert a Garage - £15,988

Garage - £18,488

Build a flat roof extension - £21,988

Build a dormer loft conversion - £41,988

Concrete foundations - £6,238

Convert a bungalow loft - £28,988

Convert a basement - £37,365