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 Corsham. We offer a competitive rate to complete all your ...
From £86,824
Need an Extension Builder in Corsham? Mucha Construcion has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
From £87,544
GARY G BOND LIMITED are here to help customers who need an Extension Builder in Corsham. We offer a competitive rate to complete all your extension...
From £86,920
Relax... you have found a reliable extension builder in Corsham. RD Pope Construction is a friendly and reliable company based in Corsham who consi...
From £87,208
FEATHERBED CONSTRUCTION is a trusted extension builder serving customers in Corsham and the surrounding area. Contact us to today to get a competit...
From £87,080
HYATT BUILDING SERVICES are here to help customers who need an Extension Builder in Corsham. We offer a competitive rate to complete all your exten...
From £87,192
B ROBINSON BUILDING is an established and experienced local extension builder in Corsham. Please contact us for a free, no obligation quote and com...
From £87,248
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,128
BM Builders UK are here to help customers who need an Extension Builder in Corsham. We offer a competitive rate to complete all your extension buil...

Building a granny annexe ranges from £86,824 (Mucha Construcion based in BS10) 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 Corsham by posting a job with HaMuch. We will send it to extension builders in Corsham who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Chippenham | £34 | £258 |
| Granny Annexe near Trowbridge | £34 | £266 |
| Granny Annexe near Calne | £29 | £225 |
| Granny Annexe near West Wiltshire | £32 | £242 |
| Granny Annexe near North Wiltshire | £32 | £242 |
| Granny Annexe near Devizes | £32 | £242 |
| Granny Annexe near Yate | £34 | £263 |
| Granny Annexe near Keynsham | £33 | £251 |
| Granny Annexe near Kingswood | £34 | £257 |
| Granny Annexe near South Gloucestershire | £34 | £260 |
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 - £17,630

Two storey extension - £88,194

Build a timber frame extension - £26,130

Build a swimming pool - £81,130

Single storey extension - £57,592

Side return extension - £42,958

Install an RSJ - £2,330

Outbuilding - £10,130

Build a Mansard loft conversion - £52,130

Loft conversion - £34,965

Build a kitchen extension - £42,130

Hip to gable loft conversion - £42,130

Granny annexe - £87,130

Garden office - £10,130

Convert a Garage - £16,130

Garage - £18,630

Build a flat roof extension - £22,130

Build a dormer loft conversion - £42,130

Concrete foundations - £6,380

Convert a bungalow loft - £29,130

Convert a basement - £38,958