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S & K Windows are here to help customers who need an Extension Builder in DL7. We offer a competitive rate to complete all your extension builderin...
From £86,872
Darren Collin
Hi I'm darren
I'm a fully qualified time served joiner I have been doing it for 30 years and have been self employed for 12 years ...

Building a granny annexe ranges from £86,720 (S & K Windows based in DL6) to £86,872 (Darren Collin Joinery based in DL7), 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 DL7 by posting a job with HaMuch. We will send it to extension builders in DL7 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Darlington | £60 | £222 |
| Granny Annexe near Ingleby Barwick | £41 | £228 |
| Granny Annexe near Thornaby-on-Tees | £42 | £231 |
| Granny Annexe near Stockton-on-Tees | £41 | £228 |
| Granny Annexe near Middlesbrough | £43 | £236 |
| Granny Annexe near Newton Aycliffe | £38 | £225 |
| Granny Annexe near Billingham | £44 | £242 |
| Granny Annexe near Eston | £42 | £241 |
| Granny Annexe near Bishop Auckland | £38 | £248 |
| Granny Annexe near Harrogate | £29 | £225 |
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 - £17,296

Two storey extension - £87,694

Build a timber frame extension - £25,796

Build a swimming pool - £80,796

Single storey extension - £50,920

Side return extension - £39,205

Install an RSJ - £1,996

Outbuilding - £9,796

Build a Mansard loft conversion - £51,796

Loft conversion - £31,838

Build a kitchen extension - £41,796

Hip to gable loft conversion - £41,796

Granny annexe - £86,796

Garden office - £9,796

Convert a Garage - £15,796

Garage - £18,296

Build a flat roof extension - £21,796

Build a dormer loft conversion - £41,796

Concrete foundations - £6,046

Convert a bungalow loft - £28,796

Convert a basement - £35,205