From £22,000
SBA Facilities is a family run business founded by Director, Josef who has over 25 years of experience with the corporate, commercial, and domestic...
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 £21,592
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,048
HAROLDS CORP is a trusted extension builder serving customers in WN7 and the surrounding area. Contact us to today to get a competitive quote for e...
From £21,456
APS pointing and property maintenance offers a complete building service from small patch pointing to full refurb or extensions. Competitiv...
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 £21,776
Relax... you have found a reliable extension builder in WN7. David Anderson Builders is a friendly and reliable company based in WN7 who consider n...
From £21,720
Direct Building Services is an established and experienced local extension builder in WN7. Please contact us for a free, no obligation quote and co...
From £21,816
Construction Covered is a trusted extension builder serving customers in WN7 and the surrounding area. Contact us to today to get a competitive quo...
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...

A flat roof extension ranges from the cheapest of £21,456 (Aps pointing and property maintenance based in WN2) 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 WN7 by posting a job with HaMuch. We'll send it to extension builders in WN7.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Leigh | £31 | £224 |
| Build A Flat Roof Extension near Atherton | £31 | £223 |
| Build A Flat Roof Extension near Westhoughton | £31 | £222 |
| Build A Flat Roof Extension near Golborne | £30 | £222 |
| Build A Flat Roof Extension near Hindley | £30 | £218 |
| Build A Flat Roof Extension near Little Hulton | £30 | £220 |
| Build A Flat Roof Extension near Ashton-in-Makerfield | £30 | £220 |
| Build A Flat Roof Extension near Irlam | £32 | £225 |
| Build A Flat Roof Extension near Newton-le-Willows | £31 | £221 |
| Build A Flat Roof Extension near Wigan | £30 | £219 |
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 - £17,310

Two storey extension - £87,716

Build a timber frame extension - £25,810

Build a swimming pool - £80,810

Single storey extension - £51,208

Side return extension - £39,367

Install an RSJ - £2,010

Outbuilding - £9,810

Build a Mansard loft conversion - £51,810

Loft conversion - £31,973

Build a kitchen extension - £41,810

Hip to gable loft conversion - £41,810

Granny annexe - £86,810

Garden office - £9,810

Convert a Garage - £15,810

Garage - £18,310

Build a flat roof extension - £21,810

Build a dormer loft conversion - £41,810

Concrete foundations - £6,060

Convert a bungalow loft - £28,810

Convert a basement - £35,367