From £87,000
MID Construct is an established and experienced local extension builder in Malmesbury. Please contact us for a free, no obligation quote and compe...
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 £86,960
Deadsmooth Plastering & Building Co is a trusted extension builder serving customers in Malmesbury and the surrounding area. Contact us to today to...
From £87,000
L&P Developments Ltd is an established and experienced local extension builder in Malmesbury. Please contact us for a free, no obligation quote an...
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 £86,776
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,184
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,152
Prestige Build Services LTD is a trusted extension builder serving customers in Malmesbury and the surrounding area. Contact us to today to get a c...
From £86,536
Need an Extension Builder in Malmesbury? R PEARCE BUILDING has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £87,096
MJ solutions is an established and experienced local extension builder in Malmesbury. Please contact us for a free, no obligation quote and compet...

Building a granny annexe ranges from £86,536 (R PEARCE BUILDING based in SN15) to £87,184 (WILSONS BUILDERS CO LTD based in GL12), 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 Malmesbury by posting a job with HaMuch. We will send it to extension builders in Malmesbury who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Chippenham | £34 | £258 |
| Granny Annexe near Calne | £29 | £225 |
| Granny Annexe near Stroud | £33 | £249 |
| Granny Annexe near Thamesdown | £38 | £239 |
| Granny Annexe near Swindon | £38 | £238 |
| Granny Annexe near Stratton St Margaret | £37 | £238 |
| Granny Annexe near Yate | £34 | £263 |
| Granny Annexe near South Gloucestershire | £34 | £260 |
| Granny Annexe near North Wiltshire | £32 | £242 |
| Granny Annexe near West Wiltshire | £32 | £242 |
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 - £17,469

Two storey extension - £87,953

Build a timber frame extension - £25,969

Build a swimming pool - £80,969

Single storey extension - £54,376

Side return extension - £41,149

Install an RSJ - £2,169

Outbuilding - £9,969

Build a Mansard loft conversion - £51,969

Loft conversion - £33,458

Build a kitchen extension - £41,969

Hip to gable loft conversion - £41,969

Granny annexe - £86,969

Garden office - £9,969

Convert a Garage - £15,969

Garage - £18,469

Build a flat roof extension - £21,969

Build a dormer loft conversion - £41,969

Concrete foundations - £6,219

Convert a bungalow loft - £28,969

Convert a basement - £37,149