From £86,880
Relax... you have found a reliable extension builder in BS37. A M I Construction is a friendly and reliable company based in BS37 who consider no j...
From £86,720
Relax... you have found a reliable extension builder in BS37. J SUTTON CONSTRUCTION is a friendly and reliable company based in BS37 who consider n...
From £86,944
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,856
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,296
N J Laity & Son & Grandson's are here to help customers who need an Extension Builder in BS37. We offer a competitive rate to complete all your ext...
From £86,840
MOORLAND DESIGN & BUILD LTD are here to help customers who need an Extension Builder in BS37. We offer a competitive rate to complete all your exte...
From £86,728
Neil Causon & Son is an established and experienced local extension builder in BS37. Please contact us for a free, no obligation quote and competit...
From £86,824
Need an Extension Builder in BS37? Mucha Construcion has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £87,544
GARY G BOND LIMITED are here to help customers who need an Extension Builder in BS37. We offer a competitive rate to complete all your extension bu...
From £86,920
Relax... you have found a reliable extension builder in BS37. RD Pope Construction is a friendly and reliable company based in BS37 who consider no...

Building a granny annexe ranges from £86,720 (J SUTTON CONSTRUCTION based in GL5) to £87,544 (GARY G BOND LIMITED based in BS16), 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 BS37 by posting a job with HaMuch. We will send it to extension builders in BS37 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Yate | £34 | £263 |
| Granny Annexe near South Gloucestershire | £34 | £260 |
| Granny Annexe near Bradley Stoke | £34 | £259 |
| Granny Annexe near Kingswood | £34 | £257 |
| Granny Annexe near Bristol | £33 | £255 |
| Granny Annexe near Keynsham | £33 | £251 |
| Granny Annexe near Clifton | £33 | £255 |
| Granny Annexe near Chippenham | £34 | £258 |
| Granny Annexe near Portishead | £33 | £247 |
| Granny Annexe near Bath | £32 | £249 |
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 - £17,455

Two storey extension - £87,933

Build a timber frame extension - £25,955

Build a swimming pool - £80,955

Single storey extension - £54,104

Side return extension - £40,996

Install an RSJ - £2,155

Outbuilding - £9,955

Build a Mansard loft conversion - £51,955

Loft conversion - £33,330

Build a kitchen extension - £41,955

Hip to gable loft conversion - £41,955

Granny annexe - £86,955

Garden office - £9,955

Convert a Garage - £15,955

Garage - £18,455

Build a flat roof extension - £21,955

Build a dormer loft conversion - £41,955

Concrete foundations - £6,205

Convert a bungalow loft - £28,955

Convert a basement - £36,996