From £86,752
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,656
H TIMMINS BUILDING & MAINT is an established extension buildering business in M18. We come highly recommended and provide competitive quotes for yo...
From £86,856
Cornerstone Building Maintenance & Restoration Ltd is an established and experienced local extension builder in M18. Please contact us for a free, ...
From £86,736
Need to find an Extension Builder near you for all your extension buildering work?
J K S Builder provides a local, trusted extension builde...
From £86,936
Trusted and professional extension builder in M18. Experienced in all extension buildering work and keeping within budget and on quote. AD Installa...
From £86,720
Trusted and professional extension builder in M18. Experienced in all extension buildering work and keeping within budget and on quote. M A Buildin...
From £86,672
Sale Moor Roofing & Building Contractors is a trusted extension builder serving customers in M18 and the surrounding area. Contact us to today to g...
From £86,832
Need to find an Extension Builder near you for all your extension buildering work?
Oscar Renn provides a local, trusted extension builderin...
From £86,768
Trusted and professional extension builder in M18. Experienced in all extension buildering work and keeping within budget and on quote. B R M S hav...
From £86,792
SJD Joinery & Building are here to help customers who need an Extension Builder in M18. We offer a competitive rate to complete all your extension ...

Building a granny annexe ranges from £86,656 (H TIMMINS BUILDING & MAINT based in M18) to £86,936 (AD Installation based in M13), 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 M18 by posting a job with HaMuch. We will send it to extension builders in M18 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Reddish | £34 | £235 |
| Granny Annexe near Droylsden | £34 | £237 |
| Granny Annexe near Denton | £35 | £233 |
| Granny Annexe near Failsworth | £35 | £235 |
| Granny Annexe near Manchester | £32 | £236 |
| Granny Annexe near Dukinfield | £35 | £231 |
| Granny Annexe near Tameside | £35 | £231 |
| Granny Annexe near Old Trafford | £32 | £236 |
| Granny Annexe near Ashton-under-Lyne | £36 | £231 |
| Granny Annexe near Hyde | £36 | £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 - £17,272

Two storey extension - £87,658

Build a timber frame extension - £25,772

Build a swimming pool - £80,772

Single storey extension - £50,440

Side return extension - £38,935

Install an RSJ - £1,972

Outbuilding - £9,772

Build a Mansard loft conversion - £51,772

Loft conversion - £31,613

Build a kitchen extension - £41,772

Hip to gable loft conversion - £41,772

Granny annexe - £86,772

Garden office - £9,772

Convert a Garage - £15,772

Garage - £18,272

Build a flat roof extension - £21,772

Build a dormer loft conversion - £41,772

Concrete foundations - £6,022

Convert a bungalow loft - £28,772

Convert a basement - £34,935