From £21,496
Trusted and professional extension builder in Rhondda. Experienced in all extension buildering work and keeping within budget and on quote. RJ CONS...
From £21,616
Excel Home Design Ltd is an established extension buildering business in Rhondda. We come highly recommended and provide competitive quotes for you...
From £21,792
We are a small family run business, established over 35 years ago, specialising in Hard Landscaping (Patios) and Block Paving.We a...
From £21,576
L E JONES BUILDER is an established extension buildering business in Rhondda. We come highly recommended and provide competitive quotes for your wo...
From £21,552
P ALLEN BUILDERS is an established and experienced local extension builder in Rhondda. Please contact us for a free, no obligation quote and compet...
From £21,704
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,528
Need an Extension Builder in Rhondda? A POWELL CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering job...
From £21,896
Barlam Drylining Ltd are here to help customers who need an Extension Builder in Rhondda. We offer a competitive rate to complete all your extensio...
From £21,824
Need an Extension Builder in Rhondda? FORMWORK CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering job...
From £21,616
EXTEND & BUILD LTD is an established and experienced local extension builder in Rhondda. Please contact us for a free, no obligation quote and comp...

A flat roof extension ranges from the cheapest of £21,496 (RJ CONSTRUCTION based in CF40) to the dearest of £21,896 (Barlam Drylining Ltd based in CF45), 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 Rhondda by posting a job with HaMuch. We'll send it to extension builders in Rhondda.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Rhondda | £31 | £206 |
| Build A Flat Roof Extension near Rhondda, Cynon, Taff | £31 | £209 |
| Build A Flat Roof Extension near Pontypridd | £33 | £211 |
| Build A Flat Roof Extension near Church Village | £34 | £214 |
| Build A Flat Roof Extension near Aberdare | £32 | £212 |
| Build A Flat Roof Extension near Caerphilly | £33 | £208 |
| Build A Flat Roof Extension near Merthyr Tydfil | £33 | £220 |
| Build A Flat Roof Extension near Maesteg | £38 | £283 |
| Build A Flat Roof Extension near Bridgend | £32 | £200 |
| Build A Flat Roof Extension near Tredegar | £30 | £217 |
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 - £17,160

Two storey extension - £87,490

Build a timber frame extension - £25,660

Build a swimming pool - £80,660

Single storey extension - £48,200

Side return extension - £37,675

Install an RSJ - £1,860

Outbuilding - £9,660

Build a Mansard loft conversion - £51,660

Loft conversion - £30,563

Build a kitchen extension - £41,660

Hip to gable loft conversion - £41,660

Granny annexe - £86,660

Garden office - £9,660

Convert a Garage - £15,660

Garage - £18,160

Build a flat roof extension - £21,660

Build a dormer loft conversion - £41,660

Concrete foundations - £5,910

Convert a bungalow loft - £28,660

Convert a basement - £33,675