From £87,544
GARY G BOND LIMITED are here to help customers who need an Extension Builder in SN15. We offer a competitive rate to complete all your extension bu...
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 £87,080
HYATT BUILDING SERVICES are here to help customers who need an Extension Builder in SN15. We offer a competitive rate to complete all your extensio...
From £86,800
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,184
Need to find an Extension Builder near you for all your extension buildering work?
WILSONS BUILDERS CO LTD provides a local, trusted extens...
From £87,152
Prestige Build Services LTD is a trusted extension builder serving customers in SN15 and the surrounding area. Contact us to today to get a competi...
From £86,752
Concept Solutions Bristol Ltd is an established and experienced local extension builder in SN15. Please contact us for a free, no obligation quote ...
From £86,824
24 7 BUILDING SOLUTIONS LTD is a trusted extension builder serving customers in SN15 and the surrounding area. Contact us to today to get a competi...
From £86,536
Need an Extension Builder in SN15? R PEARCE BUILDING has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £87,096
MJ solutions is an established and experienced local extension builder in SN15. Please contact us for a free, no obligation quote and competitive ...

Building a granny annexe ranges from £86,536 (R PEARCE BUILDING based in SN15) 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 SN15 by posting a job with HaMuch. We will send it to extension builders in SN15 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Calne | £29 | £225 |
| Granny Annexe near Chippenham | £34 | £258 |
| Granny Annexe near West Wiltshire | £32 | £242 |
| Granny Annexe near North Wiltshire | £32 | £242 |
| Granny Annexe near Devizes | £32 | £242 |
| Granny Annexe near Trowbridge | £34 | £266 |
| Granny Annexe near Swindon | £38 | £238 |
| Granny Annexe near Thamesdown | £38 | £239 |
| Granny Annexe near Yate | £34 | £263 |
| Granny Annexe near Stratton St Margaret | £37 | £238 |
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 - £17,482

Two storey extension - £87,974

Build a timber frame extension - £25,982

Build a swimming pool - £80,982

Single storey extension - £54,648

Side return extension - £41,302

Install an RSJ - £2,182

Outbuilding - £9,982

Build a Mansard loft conversion - £51,982

Loft conversion - £33,585

Build a kitchen extension - £41,982

Hip to gable loft conversion - £41,982

Granny annexe - £86,982

Garden office - £9,982

Convert a Garage - £15,982

Garage - £18,482

Build a flat roof extension - £21,982

Build a dormer loft conversion - £41,982

Concrete foundations - £6,232

Convert a bungalow loft - £28,982

Convert a basement - £37,302