From £86,744
Relax... you have found a reliable extension builder in B31. Platinum Build is a friendly and reliable company based in B31 who consider no job as ...
From £86,944
Wilson & Son is an established and experienced local extension builder in B31. Please contact us for a free, no obligation quote and competitive ra...
From £86,728
Trusted and professional extension builder in B31. Experienced in all extension buildering work and keeping within budget and on quote. D & S Decor...
From £86,600
Need to find an Extension Builder near you for all your extension buildering work?
D Broomhall provides a local, trusted extension builderi...
From £86,904
Trusted and professional extension builder in B31. Experienced in all extension buildering work and keeping within budget and on quote. Ciara Const...
From £86,696
Experienced extension builder ready to quote for your work. Plowman & Wood is the best extension builder in B31. No obligation free quotes and many...
From £86,960
SM&S General Property Repairs is a trusted extension builder serving customers in B31 and the surrounding area. Contact us to today to get a compet...
From £86,800
Need to find an Extension Builder near you for all your extension buildering work?
Michael Locke Garage Doors provides a local, trusted ext...
From £86,880
Relax... you have found a reliable extension builder in B31. Tucker Construction is a friendly and reliable company based in B31 who consider no jo...
From £86,688
Experienced extension builder ready to quote for your work. Buildtech is the best extension builder in B31. No obligation free quotes and many happ...

Building a granny annexe ranges from £86,600 (D Broomhall based in B45) to £86,960 (SM&S General Property Repairs based in B38), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in B31 by posting a job with HaMuch. We will send it to extension builders in B31 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Halesowen | £29 | £227 |
| Granny Annexe near Oldbury | £29 | £227 |
| Granny Annexe near Smethwick | £29 | £226 |
| Granny Annexe near Rowley Regis | £29 | £226 |
| Granny Annexe near Birmingham | £29 | £227 |
| Granny Annexe near Bromsgrove | £31 | £237 |
| Granny Annexe near West Bromwich | £29 | £227 |
| Granny Annexe near Brierley Hill | £28 | £223 |
| Granny Annexe near Stourbridge | £28 | £223 |
| Granny Annexe near Solihull | £29 | £231 |
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 - £17,294

Two storey extension - £87,692

Build a timber frame extension - £25,794

Build a swimming pool - £80,794

Single storey extension - £50,888

Side return extension - £39,187

Install an RSJ - £1,994

Outbuilding - £9,794

Build a Mansard loft conversion - £51,794

Loft conversion - £31,823

Build a kitchen extension - £41,794

Hip to gable loft conversion - £41,794

Granny annexe - £86,794

Garden office - £9,794

Convert a Garage - £15,794

Garage - £18,294

Build a flat roof extension - £21,794

Build a dormer loft conversion - £41,794

Concrete foundations - £6,044

Convert a bungalow loft - £28,794

Convert a basement - £35,187