From £86,160
MKS Builders Ltd is an established extension buildering business in OL16. We come highly recommended and provide competitive quotes for your work.<...
From £86,816
We are a local building company who specialises in keeping our customers happy we are reliable friendly. We carry out all types of building wo...
From £87,104
Need to find an Extension Builder near you for all your extension buildering work?
Tetrosyl provides a local, trusted extension buildering ...
From £86,744
H.B.S is an established extension buildering business in OL16. We come highly recommended and provide competitive quotes for your work.
From £86,840
Need an Extension Builder in OL16? G Wardley Building & Repairs has been helping local clients (20 mile radius) with their extension buildering job...
From £86,640
Need to find an Extension Builder near you for all your extension buildering work?
Pennine Loft Conversions provides a local, trusted exten...
From £87,016
Experienced extension builder ready to quote for your work. Tetlow Construction Ltd is the best extension builder in OL16. No obligation free quote...
From £86,824
Jnc has been going for 15 years now we have over 10 lads at any time working for us . We Speselied in new building and Exstenshons
From £86,592
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,768
New era developments is a small local limited company. Who create better living spaces . On time and on buget. To a very high standard. Thanks tony...

Building a granny annexe ranges from £86,160 (MKS Builders Ltd based in OL11) to £87,104 (Tetrosyl based in OL16), 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 OL16 by posting a job with HaMuch. We will send it to extension builders in OL16 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Rochdale | £30 | £221 |
| Granny Annexe near Royton | £30 | £225 |
| Granny Annexe near Heywood | £30 | £222 |
| Granny Annexe near Chadderton | £31 | £225 |
| Granny Annexe near Middleton | £31 | £227 |
| Granny Annexe near Oldham | £31 | £229 |
| Granny Annexe near Bury | £30 | £220 |
| Granny Annexe near Failsworth | £35 | £236 |
| Granny Annexe near Whitefield | £31 | £229 |
| Granny Annexe near Prestwich | £31 | £234 |
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 - £17,250

Two storey extension - £87,626

Build a timber frame extension - £25,750

Build a swimming pool - £80,750

Single storey extension - £50,008

Side return extension - £38,692

Install an RSJ - £1,950

Outbuilding - £9,750

Build a Mansard loft conversion - £51,750

Loft conversion - £31,410

Build a kitchen extension - £41,750

Hip to gable loft conversion - £41,750

Granny annexe - £86,750

Garden office - £9,750

Convert a Garage - £15,750

Garage - £18,250

Build a flat roof extension - £21,750

Build a dormer loft conversion - £41,750

Concrete foundations - £6,000

Convert a bungalow loft - £28,750

Convert a basement - £34,692