From £21,528
Trusted and professional extension builder in Horncastle. Experienced in all extension buildering work and keeping within budget and on quote. PAUL...
From £21,544
A family run business, operating all over Lincolnshire.

A flat roof extension ranges from the cheapest of £21,528 (PAUL JACKSON BUILDING CONTRS based in PE23) to the dearest of £21,544 (JP Design & Develop Ltd based in LN10), 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 Horncastle by posting a job with HaMuch. We'll send it to extension builders in Horncastle.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near East Lindsey | £27 | £198 |
| Build A Flat Roof Extension near Boston | £28 | £262 |
| Build A Flat Roof Extension near Lincoln | £31 | £232 |
| Build A Flat Roof Extension near Cleethorpes | £32 | £246 |
| Build A Flat Roof Extension near North East Lincolnshire | £32 | £246 |
| Build A Flat Roof Extension near Grimsby | £32 | £246 |
| Build A Flat Roof Extension near Spalding | £32 | £238 |
| Build A Flat Roof Extension near Gainsborough | £30 | £234 |
| Build A Flat Roof Extension near Newark-on-Trent | £33 | £241 |
| Build A Flat Roof Extension near Grantham | £38 | £228 |
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 - £17,036

Two storey extension - £87,304

Build a timber frame extension - £25,536

Build a swimming pool - £80,536

Single storey extension - £45,720

Side return extension - £36,280

Install an RSJ - £1,736

Outbuilding - £9,536

Build a Mansard loft conversion - £51,536

Loft conversion - £29,400

Build a kitchen extension - £41,536

Hip to gable loft conversion - £41,536

Granny annexe - £86,536

Garden office - £9,536

Convert a Garage - £15,536

Garage - £18,036

Build a flat roof extension - £21,536

Build a dormer loft conversion - £41,536

Concrete foundations - £5,786

Convert a bungalow loft - £28,536

Convert a basement - £32,280