Relax... you have found a reliable extension builder in County Durham. AA Paving is a friendly and reliable company based in County Durham who cons...
From £86,760
Need an Extension Builder in County Durham? K & J Property has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £87,064
Croft-Hill Building & Joinery is a trusted extension builder serving customers in County Durham and the surrounding area. Contact us to today to ge...
From £86,968
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,040
Need to find an Extension Builder near you for all your extension buildering work?
SBC (BUILDERS) LIMITED provides a local, trusted extensi...
From £86,880
J.collinson is an established and experienced local extension builder in County Durham. Please contact us for a free, no obligation quote and compe...

Building a granny annexe ranges from £86,760 (K & J Property based in DH7) to £87,064 (Croft-Hill Building & Joinery based in DL15), 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 County Durham by posting a job with HaMuch. We will send it to extension builders in County Durham who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Bishop Auckland | £38 | £248 |
| Granny Annexe near Spennymoor | £37 | £249 |
| Granny Annexe near Newton Aycliffe | £38 | £225 |
| Granny Annexe near Durham | £47 | £267 |
| Granny Annexe near Darlington | £60 | £222 |
| Granny Annexe near Consett | £33 | £241 |
| Granny Annexe near Stanley | £34 | £242 |
| Granny Annexe near Chester-le-Street | £35 | £242 |
| Granny Annexe near Peterlee | £36 | £230 |
| Granny Annexe near Washington | £33 | £254 |
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 - £17,452

Two storey extension - £87,928

Build a timber frame extension - £25,952

Build a swimming pool - £80,952

Single storey extension - £54,040

Side return extension - £40,960

Install an RSJ - £2,152

Outbuilding - £9,952

Build a Mansard loft conversion - £51,952

Loft conversion - £33,300

Build a kitchen extension - £41,952

Hip to gable loft conversion - £41,952

Granny annexe - £86,952

Garden office - £9,952

Convert a Garage - £15,952

Garage - £18,452

Build a flat roof extension - £21,952

Build a dormer loft conversion - £41,952

Concrete foundations - £6,202

Convert a bungalow loft - £28,952

Convert a basement - £36,960