From £22,176
Witton & Pearce Builders in Essex is a trusted extension builder serving customers in Rainham and the surrounding area. Contact us to today to get ...
From £22,272
P OUGHTON BUILDING is an established and experienced local extension builder in Rainham. Please contact us for a free, no obligation quote and comp...
From £21,456
Experienced extension builder ready to quote for your work. Capital Roofing Ltd is the best extension builder in Rainham. No obligation free quotes...
From £22,360
Need an Extension Builder in Rainham? Ellis & James Builders Limited has been helping local clients (20 mile radius) with their extension builderin...
From £22,160
Property Maintenance are here to help customers who need an Extension Builder in Rainham. We offer a competitive rate to complete all your extensio...
From £21,056
35 years in the trade can Lay bricks plaster roofing wall and floor tiling
From £21,368
Hi
I'm very well rated tradesmen please check my website
See you soon
From £21,320
MAGNOLIA HOME is family run,Tunbridge Wells based building company,.With years expirence,you as the customer can be assured that you are in safe ha...
From £22,008
Over 35 years experience
We are Gas Safe registered
We are Verified
We pride ourselves on great custom...
From £21,720
Need to find an Extension Builder near you for all your extension buildering work?
JLS Building Services provides a local, trusted extensio...

A flat roof extension ranges from the cheapest of £21,056 (S MEGSON CONSTRUCTION based in CT5) to the dearest of £22,360 (Ellis & James Builders Limited based in SS17), 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 Rainham by posting a job with HaMuch. We'll send it to extension builders in Rainham.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| 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 Sittingbourne | £35 | £246 |
| Build A Flat Roof Extension near Maidstone | £40 | £255 |
| Build A Flat Roof Extension near Larkfield | £41 | £253 |
| Build A Flat Roof Extension near Swale | £35 | £241 |
| Build A Flat Roof Extension near Gravesend | £40 | £260 |
| Build A Flat Roof Extension near Canvey Island | £39 | £256 |
| Build A Flat Roof Extension near Northfleet | £41 | £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 - £17,290

Two storey extension - £87,684

Build a timber frame extension - £25,790

Build a swimming pool - £80,790

Single storey extension - £50,792

Side return extension - £39,133

Install an RSJ - £1,990

Outbuilding - £9,790

Build a Mansard loft conversion - £51,790

Loft conversion - £31,778

Build a kitchen extension - £41,790

Hip to gable loft conversion - £41,790

Granny annexe - £86,790

Garden office - £9,790

Convert a Garage - £15,790

Garage - £18,290

Build a flat roof extension - £21,790

Build a dormer loft conversion - £41,790

Concrete foundations - £6,040

Convert a bungalow loft - £28,790

Convert a basement - £35,133