From £87,080
Astley Bridge Building Services have been established since 1999 and offer quality building services to the public who are looking for a personal s...
From £86,600
Bolton Builders is an established and experienced local extension builder in BL7. Please contact us for a free, no obligation quote and competitive...
From £87,112
Come Home To Quality. First Rate Home Builders delivers quality construction in a professional manner. Servicing Bolton and the surrounding areas o...
From £86,664
QUAYSTONE BUILDING LTD are here to help customers who need an Extension Builder in BL7. We offer a competitive rate to complete all your extension ...
From £86,808
Need an Extension Builder in BL7? CB BUILDING & JOINERY LTD has been helping local clients (20 mile radius) with their extension buildering jobs fo...
From £87,040
PETER BALDWIN BUILDERS is an established extension buildering business in BL7. We come highly recommended and provide competitive quotes for your w...
From £86,760
IK MASTER BUILD LTD is an established and experienced local extension builder in BL7. Please contact us for a free, no obligation quote and competi...
From £86,896
Need to find an Extension Builder near you for all your extension buildering work?
J & C Barker (Builders) Limited provides a local, truste...
From £86,632
Fishers Building & Paving Ltd is an established extension buildering business in BL7. We come highly recommended and provide competitive quotes for...
From £86,768
Wallplas is an established extension buildering business in BL7. We come highly recommended and provide competitive quotes for your work.

Building a granny annexe ranges from £86,600 (Bolton Builders based in BL2) to £87,112 (First Rate Home Builders based in BL2), 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 BL7 by posting a job with HaMuch. We will send it to extension builders in BL7 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Bolton | £27 | £193 |
| Granny Annexe near Darwen | £30 | £223 |
| Granny Annexe near Horwich | £27 | £192 |
| Granny Annexe near Bury | £26 | £192 |
| Granny Annexe near Farnworth | £27 | £194 |
| Granny Annexe near Radcliffe | £26 | £194 |
| Granny Annexe near Westhoughton | £27 | £194 |
| Granny Annexe near Little Hulton | £27 | £196 |
| Granny Annexe near Rawtenstall | £26 | £193 |
| Granny Annexe near Atherton | £27 | £194 |
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 - £17,336

Two storey extension - £87,754

Build a timber frame extension - £25,836

Build a swimming pool - £80,836

Single storey extension - £51,720

Side return extension - £39,655

Install an RSJ - £2,036

Outbuilding - £9,836

Build a Mansard loft conversion - £51,836

Loft conversion - £32,213

Build a kitchen extension - £41,836

Hip to gable loft conversion - £41,836

Granny annexe - £86,836

Garden office - £9,836

Convert a Garage - £15,836

Garage - £18,336

Build a flat roof extension - £21,836

Build a dormer loft conversion - £41,836

Concrete foundations - £6,086

Convert a bungalow loft - £28,836

Convert a basement - £35,655