From £21,712
Mountainview Construction is an established and experienced local extension builder in B15. Please contact us for a free, no obligation quote and c...
From £21,936
Kunda Group is a trusted extension builder serving customers in B15 and the surrounding area. Contact us to today to get a competitive quote for ex...
From £21,968
Need an Extension Builder in B15? Multiservice K Construction Ltd has been helping local clients (20 mile radius) with their extension buildering j...
From £22,104
We are a design and build company that offer bespoke services to our clients, delivering professional services that help home owners achieve their ...
From £21,872
Relax... you have found a reliable extension builder in B15. BORDO Design is a friendly and reliable company based in B15 who consider no job as to...
From £21,704
Experienced extension builder ready to quote for your work. Spectrum Homes is the best extension builder in B15. No obligation free quotes and many...
From £21,696
Need an Extension Builder in B15? BellTrim Wood Products has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £21,696
Laurence Cox is an established and experienced local extension builder in B15. Please contact us for a free, no obligation quote and competitive ra...
From £21,792
Need an Extension Builder in B15? EDEN BUILD LTD has been helping local clients (20 mile radius) with their extension buildering jobs for many year...
From £21,640
Renka is an established and experienced local extension builder in B15. Please contact us for a free, no obligation quote and competitive rates. Co...

A flat roof extension ranges from the cheapest of £21,640 (Renka based in B19) to the dearest of £22,104 (Multiservice K Construction Ltd based in B17), 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 B15 by posting a job with HaMuch. We'll send it to extension builders in B15.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Birmingham | £25 | £197 |
| Build A Flat Roof Extension near Smethwick | £25 | £195 |
| Build A Flat Roof Extension near Oldbury | £25 | £196 |
| Build A Flat Roof Extension near Halesowen | £25 | £197 |
| Build A Flat Roof Extension near West Bromwich | £25 | £195 |
| Build A Flat Roof Extension near Rowley Regis | £25 | £196 |
| Build A Flat Roof Extension near Sandwell | £25 | £196 |
| Build A Flat Roof Extension near Tipton | £25 | £196 |
| Build A Flat Roof Extension near Solihull | £24 | £194 |
| Build A Flat Roof Extension near Sutton Coldfield | £25 | £202 |
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 - £17,312

Two storey extension - £87,718

Build a timber frame extension - £25,812

Build a swimming pool - £80,812

Single storey extension - £51,240

Side return extension - £39,385

Install an RSJ - £2,012

Outbuilding - £9,812

Build a Mansard loft conversion - £51,812

Loft conversion - £31,988

Build a kitchen extension - £41,812

Hip to gable loft conversion - £41,812

Granny annexe - £86,812

Garden office - £9,812

Convert a Garage - £15,812

Garage - £18,312

Build a flat roof extension - £21,812

Build a dormer loft conversion - £41,812

Concrete foundations - £6,062

Convert a bungalow loft - £28,812

Convert a basement - £35,385