From £21,648
Trusted and professional extension builder in M23. Experienced in all extension buildering work and keeping within budget and on quote. Just Conver...
From £21,936
Assured Building Solutions is an established extension buildering business in M23. We come highly recommended and provide competitive quotes for yo...
From £21,856
Bespoke BC should be your first port of call for all building jobs; from landscaping and ground work, to full renovations and everything in between...
From £22,016
Relax... you have found a reliable extension builder in M23. SupeRend is a friendly and reliable company based in M23 who consider no job as too bi...
From £21,960
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,840
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,888
Denis Gleeson is an established extension buildering business in M23. We come highly recommended and provide competitive quotes for your work.
...From £22,056
We cover all aspects of domestic construction management ,bespoke finishes , extensions ,coloured render-full refurbishment , use high end material...
From £21,608
Experienced extension builder ready to quote for your work. DJ Brooks Construction is the best extension builder in M23. No obligation free quotes ...
From £21,624
OLDFIELD BUILD & SHOPFIT LTD is a trusted extension builder serving customers in M23 and the surrounding area. Contact us to today to get a competi...

A flat roof extension ranges from the cheapest of £21,608 (DJ Brooks Construction based in WA14) to the dearest of £22,056 (Superiorum contractor & consultant based in M21), 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 M23 by posting a job with HaMuch. We'll send it to extension builders in M23.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Wythenshawe | £27 | £198 |
| Build A Flat Roof Extension near Gatley | £27 | £200 |
| Build A Flat Roof Extension near Sale | £28 | £203 |
| Build A Flat Roof Extension near Altrincham | £27 | £196 |
| Build A Flat Roof Extension near Trafford | £28 | £203 |
| Build A Flat Roof Extension near Stretford | £27 | £203 |
| Build A Flat Roof Extension near Old Trafford | £27 | £203 |
| Build A Flat Roof Extension near Cheadle Hulme | £27 | £201 |
| Build A Flat Roof Extension near Urmston | £27 | £201 |
| Build A Flat Roof Extension near Wilmslow | £27 | £201 |
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 - £17,343

Two storey extension - £87,765

Build a timber frame extension - £25,843

Build a swimming pool - £80,843

Single storey extension - £51,864

Side return extension - £39,736

Install an RSJ - £2,043

Outbuilding - £9,843

Build a Mansard loft conversion - £51,843

Loft conversion - £32,280

Build a kitchen extension - £41,843

Hip to gable loft conversion - £41,843

Granny annexe - £86,843

Garden office - £9,843

Convert a Garage - £15,843

Garage - £18,343

Build a flat roof extension - £21,843

Build a dormer loft conversion - £41,843

Concrete foundations - £6,093

Convert a bungalow loft - £28,843

Convert a basement - £35,736