From £87,032
Hello, I am Allan. I have run Allan Rowe Property Services since September 2014. I am based in Newton Le Willows and provide a wide range of proper...
From £86,864
Need to find an Extension Builder near you for all your extension buildering work?
Maintenance Point provides a local, trusted extension bu...
From £86,224
MJ Barker & Son is an established extension buildering business in WA12. We come highly recommended and provide competitive quotes for your work.
From £86,792
Our building services company Compass Property Renovations (North West) Ltd was established in 2000. Since then we have been helping customers in W...
From £86,800
Need to find an Extension Builder near you for all your extension buildering work?
J R Building Services provides a local, trusted extensio...
From £86,696
Welcome to Space Design & Build a building company based in Warrington.With nearly 40 years combined experience in the industry Space Design & Buil...
From £86,776
RP Construction Design is an established extension buildering business in WA12. We come highly recommended and provide competitive quotes for your ...
From £86,720
Need to find an Extension Builder near you for all your extension buildering work?
JOHN ROSS BUILDERS LTD provides a local, trusted extensi...
From £86,648
Trusted and professional extension builder in WA12. Experienced in all extension buildering work and keeping within budget and on quote. HPH Improv...
From £86,672
Fixit Cheshire is an established and experienced local extension builder in WA12. Please contact us for a free, no obligation quote and competitive...

Building a granny annexe ranges from £86,224 (MJ Barker & Son based in WA11) to £87,032 (Allan Rowe Property Services based in WA12), 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 WA12 by posting a job with HaMuch. We will send it to extension builders in WA12 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Newton-le-Willows | £31 | £221 |
| Granny Annexe near Golborne | £30 | £222 |
| Granny Annexe near Ashton-in-Makerfield | £30 | £220 |
| Granny Annexe near St Helens | £31 | £224 |
| Granny Annexe near Warrington | £31 | £222 |
| Granny Annexe near Leigh | £31 | £224 |
| Granny Annexe near Hindley | £30 | £218 |
| Granny Annexe near Wigan | £30 | £219 |
| Granny Annexe near Orrell | £29 | £214 |
| Granny Annexe near Widnes | £31 | £220 |
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 - £17,222

Two storey extension - £87,584

Build a timber frame extension - £25,722

Build a swimming pool - £80,722

Single storey extension - £49,448

Side return extension - £38,377

Install an RSJ - £1,922

Outbuilding - £9,722

Build a Mansard loft conversion - £51,722

Loft conversion - £31,148

Build a kitchen extension - £41,722

Hip to gable loft conversion - £41,722

Granny annexe - £86,722

Garden office - £9,722

Convert a Garage - £15,722

Garage - £18,222

Build a flat roof extension - £21,722

Build a dormer loft conversion - £41,722

Concrete foundations - £5,972

Convert a bungalow loft - £28,722

Convert a basement - £34,377