Need to find an Extension Builder near you for all your extension buildering work?
WILSONS BUILDERS CO LTD provides a local, trusted extens...
Stag Design & Build is the ultimate package for your Extension, New Build, Renovations and all other aspects involving the construction industry, d...
Need to find an Extension Builder near you for all your extension buildering work?
M J LLEWLLYN BUILDING SERVICES provides a local, trusted...
Experienced extension builder ready to quote for your work. G & J BUILDING MAINTENANCE is the best extension builder in Berkeley. No obligation fre...
From £87,008
Gastropod Services is an established and experienced local extension builder in Berkeley. Please contact us for a free, no obligation quote and com...
From £86,840
MI Works Cotswolds Ltd are here to help customers who need an Extension Builder in Berkeley. We offer a competitive rate to complete all your exten...
From £86,696
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,864
Need an Extension Builder in Berkeley? Milliner Construction has been helping local clients (20 mile radius) with their extension buildering jobs f...
From £87,496
James Davis
J D Plant Groundwork is a well established construction company providing value-added engineering, construction and service skills to customers for...

Building a granny annexe ranges from £86,696 (J R BUILDING LTD based in GL2) to £87,496 (JD PLANT GRDWRK SPECIALIST LTD based in GL14), 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 Berkeley by posting a job with HaMuch. We will send it to extension builders in Berkeley who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Yate | £34 | £263 |
| Granny Annexe near Stroud | £33 | £249 |
| Granny Annexe near Bradley Stoke | £34 | £259 |
| Granny Annexe near South Gloucestershire | £34 | £260 |
| Granny Annexe near Quedgeley | £32 | £247 |
| Granny Annexe near Gloucester | £31 | £236 |
| Granny Annexe near Kingswood | £34 | £257 |
| Granny Annexe near Bristol | £33 | £255 |
| Granny Annexe near Clifton | £33 | £255 |
| Granny Annexe near Chippenham | £34 | £258 |
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 - £17,500

Two storey extension - £88,000

Build a timber frame extension - £26,000

Build a swimming pool - £81,000

Single storey extension - £55,000

Side return extension - £41,500

Install an RSJ - £2,200

Outbuilding - £10,000

Build a Mansard loft conversion - £52,000

Loft conversion - £33,750

Build a kitchen extension - £42,000

Hip to gable loft conversion - £42,000

Granny annexe - £87,000

Garden office - £10,000

Convert a Garage - £16,000

Garage - £18,500

Build a flat roof extension - £22,000

Build a dormer loft conversion - £42,000

Concrete foundations - £6,250

Convert a bungalow loft - £29,000

Convert a basement - £37,500