From £86,760
Trusted and professional extension builder in Darlington. Experienced in all extension buildering work and keeping within budget and on quote. D & ...
From £87,208
Experienced extension builder ready to quote for your work. pidesigns is the best extension builder in Darlington. No obligation free quotes and ma...
From £86,632
Darlington, DL2
Partek Site Services is an established and experienced local extension builder in Darlington. Please contact us for a free, no obligation quote and...
From £86,880
Relax... you have found a reliable extension builder in Darlington. Under Pressure is a friendly and reliable company based in Darlington who consi...
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...
From £86,640
Lee Construction (LDG) Ltd is a trusted extension builder serving customers in Darlington and the surrounding area. Contact us to today to get a co...
From £86,736
Need an Extension Builder in Darlington? Northern Roofline Solutions has been helping local clients (20 mile radius) with their extension builderin...
From £86,744
Trusted and professional extension builder in Darlington. Experienced in all extension buildering work and keeping within budget and on quote. Empi...
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 £86,664
Friendly, honest and fair. High standard of work for affordable prices. With over 30 years experience all work guarenteed. With free quotations

Building a granny annexe ranges from £86,632 (Partek Site Services based in DL2) to £87,208 (Pidesigns based in DL1), 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 Darlington by posting a job with HaMuch. We will send it to extension builders in Darlington who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Darlington | £60 | £222 |
| Granny Annexe near Newton Aycliffe | £39 | £227 |
| Granny Annexe near Stockton-on-Tees | £40 | £226 |
| Granny Annexe near Ingleby Barwick | £41 | £227 |
| Granny Annexe near Thornaby-on-Tees | £41 | £230 |
| Granny Annexe near Bishop Auckland | £39 | £247 |
| Granny Annexe near Spennymoor | £38 | £248 |
| Granny Annexe near Billingham | £43 | £240 |
| Granny Annexe near Middlesbrough | £42 | £235 |
| Granny Annexe near Eston | £42 | £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 - £17,303

Two storey extension - £87,705

Build a timber frame extension - £25,803

Build a swimming pool - £80,803

Single storey extension - £51,064

Side return extension - £39,286

Install an RSJ - £2,003

Outbuilding - £9,803

Build a Mansard loft conversion - £51,803

Loft conversion - £31,905

Build a kitchen extension - £41,803

Hip to gable loft conversion - £41,803

Granny annexe - £86,803

Garden office - £9,803

Convert a Garage - £15,803

Garage - £18,303

Build a flat roof extension - £21,803

Build a dormer loft conversion - £41,803

Concrete foundations - £6,053

Convert a bungalow loft - £28,803

Convert a basement - £35,286