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Select your affordable WF9 extension builder
Harvie Construction is an established and experienced local extension builder in WF9. Please contact us for a free, no obligation quote and competi...
From £22,032
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

A flat roof extension ranges from the cheapest of £21,864 (Harvie Construction based in S72) to the dearest of £22,032 (C&S BUILDERS based in WF7), 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 WF9 by posting a job with HaMuch. We'll send it to extension builders in WF9.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Pontefract | £30 | £228 |
| Build A Flat Roof Extension near Barnsley | £31 | £242 |
| Build A Flat Roof Extension near Normanton | £30 | £233 |
| Build A Flat Roof Extension near Castleford | £30 | £225 |
| Build A Flat Roof Extension near Wakefield | £31 | £240 |
| Build A Flat Roof Extension near Doncaster | £29 | £238 |
| Build A Flat Roof Extension near Rothwell | £30 | £230 |
| Build A Flat Roof Extension near Ossett | £33 | £245 |
| Build A Flat Roof Extension near Rotherham | £32 | £257 |
| Build A Flat Roof Extension near Wickersley | £32 | £258 |
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 - £17,448

Two storey extension - £87,922

Build a timber frame extension - £25,948

Build a swimming pool - £80,948

Single storey extension - £53,960

Side return extension - £40,915

Install an RSJ - £2,148

Outbuilding - £9,948

Build a Mansard loft conversion - £51,948

Loft conversion - £33,263

Build a kitchen extension - £41,948

Hip to gable loft conversion - £41,948

Granny annexe - £86,948

Garden office - £9,948

Convert a Garage - £15,948

Garage - £18,448

Build a flat roof extension - £21,948

Build a dormer loft conversion - £41,948

Concrete foundations - £6,198

Convert a bungalow loft - £28,948

Convert a basement - £36,915