From £22,664
Joe Rendell
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,240
Harmony contractor's is an established and experienced local extension builder in TN27. Please contact us for a free, no obligation quote and compe...

A flat roof extension ranges from the cheapest of £22,240 (Harmony contractor's based in TN27) to the dearest of £22,664 (JR Building Services based in TN27), 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 TN27 by posting a job with HaMuch. We'll send it to extension builders in TN27.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Ashford | £36 | £256 |
| Build A Flat Roof Extension near Maidstone | £40 | £255 |
| Build A Flat Roof Extension near Swale | £35 | £241 |
| Build A Flat Roof Extension near Sittingbourne | £35 | £246 |
| Build A Flat Roof Extension near Faversham | £34 | £235 |
| Build A Flat Roof Extension near Larkfield | £41 | £253 |
| Build A Flat Roof Extension near Gillingham | £39 | £253 |
| Build A Flat Roof Extension near Chatham | £39 | £254 |
| Build A Flat Roof Extension near Rochester | £39 | £254 |
| Build A Flat Roof Extension near Hythe | £31 | £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 - £17,952

Two storey extension - £88,678

Build a timber frame extension - £26,452

Build a swimming pool - £81,452

Single storey extension - £64,040

Side return extension - £46,585

Install an RSJ - £2,652

Outbuilding - £10,452

Build a Mansard loft conversion - £52,452

Loft conversion - £37,988

Build a kitchen extension - £42,452

Hip to gable loft conversion - £42,452

Granny annexe - £87,452

Garden office - £10,452

Convert a Garage - £16,452

Garage - £18,952

Build a flat roof extension - £22,452

Build a dormer loft conversion - £42,452

Concrete foundations - £6,702

Convert a bungalow loft - £29,452

Convert a basement - £42,585