From £21,784
Need to find an Extension Builder near you for all your extension buildering work?
DT ANDERSON CONSTRUCTION LTD provides a local, trusted e...

A flat roof extension ranges from the cheapest of £21,784 (DT ANDERSON CONSTRUCTION LTD based in WA8) to the dearest of £22,064 (Bakers Building Maintenance based in WA8), 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 WA8 by posting a job with HaMuch. We'll send it to extension builders in WA8.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Widnes | £31 | £220 |
| Build A Flat Roof Extension near Halton | £31 | £220 |
| Build A Flat Roof Extension near Runcorn | £33 | £228 |
| Build A Flat Roof Extension near Huyton with Roby | £31 | £225 |
| Build A Flat Roof Extension near Prescot | £31 | £223 |
| Build A Flat Roof Extension near Knowsley | £31 | £222 |
| Build A Flat Roof Extension near St Helens | £31 | £224 |
| Build A Flat Roof Extension near Warrington | £31 | £222 |
| Build A Flat Roof Extension near Newton-le-Willows | £31 | £221 |
| Build A Flat Roof Extension near Golborne | £30 | £222 |
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 - £17,424

Two storey extension - £87,886

Build a timber frame extension - £25,924

Build a swimming pool - £80,924

Single storey extension - £53,480

Side return extension - £40,645

Install an RSJ - £2,124

Outbuilding - £9,924

Build a Mansard loft conversion - £51,924

Loft conversion - £33,038

Build a kitchen extension - £41,924

Hip to gable loft conversion - £41,924

Granny annexe - £86,924

Garden office - £9,924

Convert a Garage - £15,924

Garage - £18,424

Build a flat roof extension - £21,924

Build a dormer loft conversion - £41,924

Concrete foundations - £6,174

Convert a bungalow loft - £28,924

Convert a basement - £36,645