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Select your affordable WS11 extension builder
Infinity Property Improvements Limited are here to help customers who need an Extension Builder in WS11. We offer a competitive rate to complete al...
Empire Builders is an established and experienced local extension builder in WS11. Please contact us for a free, no obligation quote and competitiv...
From £86,752
Carl Mills
Need an Extension Builder in WS11? C A MILLS BUILDING CONTR LTD has been helping local clients (20 mile radius) with their extension buildering job...
From £87,096
RJB BUILDERS is an established and experienced local extension builder in WS11. Please contact us for a free, no obligation quote and competitive r...

Building a granny annexe ranges from £86,752 (C A MILLS BUILDING CONTR LTD based in WV11) to £87,096 (RJB BUILDERS based in WS124), 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 WS11 by posting a job with HaMuch. We will send it to extension builders in WS11 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Cannock | £28 | £227 |
| Granny Annexe near Burntwood | £29 | £229 |
| Granny Annexe near Brownhills | £28 | £225 |
| Granny Annexe near Bloxwich | £28 | £225 |
| Granny Annexe near Rugeley | £30 | £230 |
| Granny Annexe near Walsall | £29 | £229 |
| Granny Annexe near Willenhall | £29 | £228 |
| Granny Annexe near Darlaston | £29 | £229 |
| Granny Annexe near Lichfield | £29 | £227 |
| Granny Annexe near Wolverhampton | £28 | £222 |
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 - £17,426

Two storey extension - £87,889

Build a timber frame extension - £25,926

Build a swimming pool - £80,926

Single storey extension - £53,520

Side return extension - £40,668

Install an RSJ - £2,126

Outbuilding - £9,926

Build a Mansard loft conversion - £51,926

Loft conversion - £33,056

Build a kitchen extension - £41,926

Hip to gable loft conversion - £41,926

Granny annexe - £86,926

Garden office - £9,926

Convert a Garage - £15,926

Garage - £18,426

Build a flat roof extension - £21,926

Build a dormer loft conversion - £41,926

Concrete foundations - £6,176

Convert a bungalow loft - £28,926

Convert a basement - £36,668