From £21,984
Need to find an Extension Builder near you for all your extension buildering work?
Atwal Building Services Ltd provides a local, trusted ex...
From £21,760
Build Ora Construction is an established and experienced local extension builder in B20. Please contact us for a free, no obligation quote and com...
From £21,816
Our building services company Chadha Constructions Limited was established in March 2021, but have been providing professional, trustworthy buildin...
From £21,584
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,984
Brickfast Builders is an established extension buildering business in B20. We come highly recommended and provide competitive quotes for your work....
From £21,640
Renka is an established and experienced local extension builder in B20. Please contact us for a free, no obligation quote and competitive rates. Co...
From £21,696
Need an Extension Builder in B20? BellTrim Wood Products has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £21,704
Experienced extension builder ready to quote for your work. Spectrum Homes is the best extension builder in B20. No obligation free quotes and many...
From £21,840
Relax... you have found a reliable extension builder in B20. MD Services is a friendly and reliable company based in B20 who consider no job as too...
From £21,704
Trusted and professional extension builder in B20. Experienced in all extension buildering work and keeping within budget and on quote. Probuild360...

A flat roof extension ranges from the cheapest of £21,584 (Parkfield Building Services Ltd based in B6) to the dearest of £21,984 (Atwal Building Services Ltd based in B20), 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 B20 by posting a job with HaMuch. We'll send it to extension builders in B20.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Birmingham | £29 | £227 |
| Build A Flat Roof Extension near Smethwick | £29 | £226 |
| Build A Flat Roof Extension near West Bromwich | £29 | £227 |
| Build A Flat Roof Extension near Sandwell | £29 | £229 |
| Build A Flat Roof Extension near Oldbury | £29 | £227 |
| Build A Flat Roof Extension near Sutton Coldfield | £29 | £228 |
| Build A Flat Roof Extension near Wednesbury | £29 | £227 |
| Build A Flat Roof Extension near Rowley Regis | £29 | £226 |
| Build A Flat Roof Extension near Walsall | £29 | £226 |
| Build A Flat Roof Extension near Tipton | £29 | £227 |
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 - £17,271

Two storey extension - £87,657

Build a timber frame extension - £25,771

Build a swimming pool - £80,771

Single storey extension - £50,424

Side return extension - £38,926

Install an RSJ - £1,971

Outbuilding - £9,771

Build a Mansard loft conversion - £51,771

Loft conversion - £31,605

Build a kitchen extension - £41,771

Hip to gable loft conversion - £41,771

Granny annexe - £86,771

Garden office - £9,771

Convert a Garage - £15,771

Garage - £18,271

Build a flat roof extension - £21,771

Build a dormer loft conversion - £41,771

Concrete foundations - £6,021

Convert a bungalow loft - £28,771

Convert a basement - £34,926