From £21,224
MJ Barker & Son is an established extension buildering business in WN4. We come highly recommended and provide competitive quotes for your work.
From £21,800
Need to find an Extension Builder near you for all your extension buildering work?
J R Building Services provides a local, trusted extensio...
From £21,720
Direct Building Services is an established and experienced local extension builder in WN4. Please contact us for a free, no obligation quote and co...
From £21,600
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,864
Need to find an Extension Builder near you for all your extension buildering work?
Maintenance Point provides a local, trusted extension bu...
From £21,800
Higher End Construction Limited is an established extension buildering business in WN4. We come highly recommended and provide competitive quotes f...
From £22,032
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,608
Trusted and professional extension builder in WN4. Experienced in all extension buildering work and keeping within budget and on quote. M L R Build...
From £22,048
HAROLDS CORP is a trusted extension builder serving customers in WN4 and the surrounding area. Contact us to today to get a competitive quote for e...
From £21,776
Relax... you have found a reliable extension builder in WN4. Jc Properties is a friendly and reliable company based in WN4 who consider no job as t...

A flat roof extension ranges from the cheapest of £21,224 (MJ Barker & Son based in WA11) to the dearest of £22,048 (HAROLDS CORP based in WN2), 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 WN4 by posting a job with HaMuch. We'll send it to extension builders in WN4.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Ashton-in-Makerfield | £26 | £191 |
| Build A Flat Roof Extension near Golborne | £26 | £193 |
| Build A Flat Roof Extension near Newton-le-Willows | £27 | £196 |
| Build A Flat Roof Extension near Wigan | £26 | £188 |
| Build A Flat Roof Extension near Hindley | £26 | £191 |
| Build A Flat Roof Extension near Orrell | £26 | £188 |
| Build A Flat Roof Extension near St Helens | £27 | £195 |
| Build A Flat Roof Extension near Leigh | £27 | £193 |
| Build A Flat Roof Extension near Westhoughton | £27 | £194 |
| Build A Flat Roof Extension near Skelmersdale | £25 | £184 |
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 - £17,247

Two storey extension - £87,621

Build a timber frame extension - £25,747

Build a swimming pool - £80,747

Single storey extension - £49,944

Side return extension - £38,656

Install an RSJ - £1,947

Outbuilding - £9,747

Build a Mansard loft conversion - £51,747

Loft conversion - £31,380

Build a kitchen extension - £41,747

Hip to gable loft conversion - £41,747

Granny annexe - £86,747

Garden office - £9,747

Convert a Garage - £15,747

Garage - £18,247

Build a flat roof extension - £21,747

Build a dormer loft conversion - £41,747

Concrete foundations - £5,997

Convert a bungalow loft - £28,747

Convert a basement - £34,656