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 £86,736
Need an Extension Builder in County Durham? Northern Roofline Solutions has been helping local clients (20 mile radius) with their extension builde...
From £86,920
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
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 £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...
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 £87,000
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 £86,848
Need to find an Extension Builder near you for all your extension buildering work?
ANWEN CONSTRUCTION provides a local, trusted extension b...

Building a granny annexe ranges from £86,736 (Northern Roofline Solutions based in DL14) to £87,264 (Heritage NE Ltd based in DL17), 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 | £39 | £247 |
| Granny Annexe near Spennymoor | £38 | £248 |
| Granny Annexe near Newton Aycliffe | £39 | £227 |
| 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 | £35 | £222 |
| Granny Annexe near Washington | £33 | £251 |
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 - £17,448

Two storey extension - £87,922

Build a timber frame extension - £25,948

Build a swimming pool - £80,948

Single storey extension - £53,960

Side return extension - £40,915

Install an RSJ - £2,148

Outbuilding - £9,948

Build a Mansard loft conversion - £51,948

Loft conversion - £33,263

Build a kitchen extension - £41,948

Hip to gable loft conversion - £41,948

Granny annexe - £86,948

Garden office - £9,948

Convert a Garage - £15,948

Garage - £18,448

Build a flat roof extension - £21,948

Build a dormer loft conversion - £41,948

Concrete foundations - £6,198

Convert a bungalow loft - £28,948

Convert a basement - £36,915