Khondda Olham
We agree on the work, price and appointment before starting. Our approach focuses on clear communication, punctuality, careful workmanship and leav...
Need to find an Extension Builder near you for all your extension buildering work?
Avonvale Garage Doors provides a local, trusted extensio...
AJ Home Improvements is an established extension buildering business in B12. We come highly recommended and provide competitive quotes for your wor...
Brickfast Builders is an established extension buildering business in B12. We come highly recommended and provide competitive quotes for your work....
Relax... you have found a reliable extension builder in B12. F.I.I Building Services Ltd is a friendly and reliable company based in B12 who consid...
We are a forward thinking, award winning design and build company based in Solihull in the West Midlands. We strive to deliver the best experience ...
Experienced extension builder ready to quote for your work. x10hosts is the best extension builder in B12. No obligation free quotes and many happy...
From £9,696
Need an Extension Builder in B12? BellTrim Wood Products has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £9,816
Our building services company Chadha Constructions Limited was established in March 2021, but have been providing professional, trustworthy buildin...
From £9,696
Laurence Cox is an established and experienced local extension builder in B12. Please contact us for a free, no obligation quote and competitive ra...

Outbuilding costs in B12 range from the cheapest of £9,696 (BellTrim Wood Products based in B3) to the dearest of £10,048 (Darthy serices and cleaning based in B5), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in B12 by posting a job with HaMuch and we will send it to extension builders.
"Build an outbuilding" - B14, job posted 02/05/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Birmingham | £28 | £226 |
| Outbuilding near Smethwick | £29 | £225 |
| Outbuilding near Oldbury | £29 | £226 |
| Outbuilding near Solihull | £29 | £231 |
| Outbuilding near Halesowen | £28 | £225 |
| Outbuilding near West Bromwich | £28 | £225 |
| Outbuilding near Sutton Coldfield | £29 | £228 |
| Outbuilding near Rowley Regis | £29 | £225 |
| Outbuilding near Sandwell | £29 | £228 |
| Outbuilding near Knowle | £31 | £241 |
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 - £17,350

Two storey extension - £87,776

Build a timber frame extension - £25,850

Build a swimming pool - £80,850

Single storey extension - £52,008

Side return extension - £39,817

Install an RSJ - £2,050

Outbuilding - £9,850

Build a Mansard loft conversion - £51,850

Loft conversion - £32,348

Build a kitchen extension - £41,850

Hip to gable loft conversion - £41,850

Granny annexe - £86,850

Garden office - £9,850

Convert a Garage - £15,850

Garage - £18,350

Build a flat roof extension - £21,850

Build a dormer loft conversion - £41,850

Concrete foundations - £6,100

Convert a bungalow loft - £28,850

Convert a basement - £35,817