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From £21,952
Our building services company AJ Construction was established in 2008. Since then we have been helping customers in Nottinghamshire and the surroun...
From £21,864
Trusted and professional extension builder in Retford. Experienced in all extension buildering work and keeping within budget and on quote. Gilman+...
From £22,272
If you are looking for a block-paving specialist Random Stone Construction can help. We have been transforming driveways for 15 ye...

A flat roof extension ranges from the cheapest of £21,864 (Gilman+Child based in DN22) to the dearest of £22,272 (Random Stone Construction based in S81), 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 Retford by posting a job with HaMuch. We'll send it to extension builders in Retford.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Retford | £31 | £243 |
| Build A Flat Roof Extension near Bassetlaw | £31 | £243 |
| Build A Flat Roof Extension near Worksop | £33 | £265 |
| Build A Flat Roof Extension near Gainsborough | £30 | £234 |
| Build A Flat Roof Extension near Forest Town | £33 | £262 |
| Build A Flat Roof Extension near Mansfield Woodhouse | £33 | £262 |
| Build A Flat Roof Extension near Wickersley | £32 | £258 |
| Build A Flat Roof Extension near Lincoln | £31 | £232 |
| Build A Flat Roof Extension near Doncaster | £29 | £238 |
| Build A Flat Roof Extension near Mansfield | £33 | £261 |
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 - £17,529

Two storey extension - £88,044

Build a timber frame extension - £26,029

Build a swimming pool - £81,029

Single storey extension - £55,587

Side return extension - £41,830

Install an RSJ - £2,229

Outbuilding - £10,029

Build a Mansard loft conversion - £52,029

Loft conversion - £34,025

Build a kitchen extension - £42,029

Hip to gable loft conversion - £42,029

Granny annexe - £87,029

Garden office - £10,029

Convert a Garage - £16,029

Garage - £18,529

Build a flat roof extension - £22,029

Build a dormer loft conversion - £42,029

Concrete foundations - £6,279

Convert a bungalow loft - £29,029

Convert a basement - £37,830