From £86,904
HOLBROOK CONSTRUCTION are here to help customers who need an Extension Builder in Keynsham. We offer a competitive rate to complete all your extens...
From £86,936
Need an Extension Builder in Keynsham? Just Plastered has been helping local clients (20 mile radius) with their extension buildering jobs for many...
From £86,872
Relax... you have found a reliable extension builder in Keynsham. Uks is a friendly and reliable company based in Keynsham who consider no job as t...
From £87,152
MOBILE .... 07901 808 028 EMAIL .... angel201665@
From £86,960
M K J Construction Ltd are here to help customers who need an Extension Builder in Keynsham. We offer a competitive rate to complete all your exten...
From £86,760
Relax... you have found a reliable extension builder in Keynsham. ASHWIN CONSTRUCTION is a friendly and reliable company based in Keynsham who cons...
From £87,240
M L BUILDING SERVICES are here to help customers who need an Extension Builder in Keynsham. We offer a competitive rate to complete all your extens...
From £86,912
Vears Decorating Limited was established in 1993 and since then has gained extensive experience with decorating all types and styles of properties,...
From £86,776
Relax... you have found a reliable extension builder in Keynsham. MSH Construction (Bristol) Ltd is a friendly and reliable company based in Keynsh...
From £87,152
J GREEN PLASTERING LTD are here to help customers who need an Extension Builder in Keynsham. We offer a competitive rate to complete all your exten...

Building a granny annexe ranges from £86,760 (ASHWIN CONSTRUCTION based in BS30) to £87,240 (M L BUILDING SERVICES based in BS14), 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 Keynsham by posting a job with HaMuch. We will send it to extension builders in Keynsham who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Keynsham | £33 | £251 |
| Granny Annexe near Kingswood | £34 | £257 |
| Granny Annexe near Bristol | £33 | £255 |
| Granny Annexe near Bath | £32 | £249 |
| Granny Annexe near Clifton | £33 | £255 |
| Granny Annexe near South Gloucestershire | £34 | £260 |
| Granny Annexe near Yate | £34 | £263 |
| Granny Annexe near Bradley Stoke | £34 | £259 |
| Granny Annexe near Portishead | £33 | £247 |
| Granny Annexe near North Somerset | £32 | £245 |
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 - £17,466

Two storey extension - £87,950

Build a timber frame extension - £25,966

Build a swimming pool - £80,966

Single storey extension - £54,328

Side return extension - £41,122

Install an RSJ - £2,166

Outbuilding - £9,966

Build a Mansard loft conversion - £51,966

Loft conversion - £33,435

Build a kitchen extension - £41,966

Hip to gable loft conversion - £41,966

Granny annexe - £86,966

Garden office - £9,966

Convert a Garage - £15,966

Garage - £18,466

Build a flat roof extension - £21,966

Build a dormer loft conversion - £41,966

Concrete foundations - £6,216

Convert a bungalow loft - £28,966

Convert a basement - £37,122