From £86,528
Experienced extension builder ready to quote for your work. KIETH GRAY ROOFING & BUILDING is the best extension builder in Thornaby. No obligation ...
From £86,808
Trusted and professional extension builder in Thornaby. Experienced in all extension buildering work and keeping within budget and on quote. DHB Bu...
From £86,832
LJP Roofing are here to help customers who need an Extension Builder in Thornaby. We offer a competitive rate to complete all your extension builde...
From £86,744
Trusted and professional extension builder in Thornaby. Experienced in all extension buildering work and keeping within budget and on quote. Empire...
From £86,880
Relax... you have found a reliable extension builder in Thornaby. Under Pressure is a friendly and reliable company based in Thornaby who consider ...
From £86,760
Trusted and professional extension builder in Thornaby. Experienced in all extension buildering work and keeping within budget and on quote. D & G ...
From £87,128
Need an Extension Builder in Thornaby? Holvey Home Improvements has been helping local clients (20 mile radius) with their extension buildering job...
From £86,784
Plant to Build Northern is an established and experienced local extension builder in Thornaby. Please contact us for a free, no obligation quote an...
From £86,896
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,720
S & K Windows are here to help customers who need an Extension Builder in Thornaby. We offer a competitive rate to complete all your extension buil...

Building a granny annexe ranges from £86,528 (KIETH GRAY ROOFING & BUILDING based in TS24) to £87,128 (Holvey Home Improvements based in TS12), 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 Thornaby by posting a job with HaMuch. We will send it to extension builders in Thornaby who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Thornaby-on-Tees | £42 | £231 |
| Granny Annexe near Ingleby Barwick | £41 | £228 |
| Granny Annexe near Stockton-on-Tees | £41 | £228 |
| Granny Annexe near Middlesbrough | £43 | £236 |
| Granny Annexe near Billingham | £44 | £242 |
| Granny Annexe near Eston | £42 | £241 |
| Granny Annexe near Redcar & Cleveland | £43 | £254 |
| Granny Annexe near Darlington | £60 | £222 |
| Granny Annexe near Redcar | £42 | £240 |
| Granny Annexe near Hartlepool | £40 | £236 |
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 - £17,308

Two storey extension - £87,712

Build a timber frame extension - £25,808

Build a swimming pool - £80,808

Single storey extension - £51,160

Side return extension - £39,340

Install an RSJ - £2,008

Outbuilding - £9,808

Build a Mansard loft conversion - £51,808

Loft conversion - £31,950

Build a kitchen extension - £41,808

Hip to gable loft conversion - £41,808

Granny annexe - £86,808

Garden office - £9,808

Convert a Garage - £15,808

Garage - £18,308

Build a flat roof extension - £21,808

Build a dormer loft conversion - £41,808

Concrete foundations - £6,058

Convert a bungalow loft - £28,808

Convert a basement - £35,340