From £87,320
Trusted and professional extension builder in S17. Experienced in all extension buildering work and keeping within budget and on quote. GFN Buildin...
From £86,968
Trusted and professional extension builder in S17. Experienced in all extension buildering work and keeping within budget and on quote. R S Heating...
From £86,960
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,312
We've been helping people across South Yorkshire and Derbyshire enhance their properties for almost two decades now, using our wealth of expertise ...
From £87,008
We are a family run business with 20 years experience.
We take great care and attention to the work we carry out and pride ourselves on ...
From £87,264
Unity Development Group is a trusted extension builder serving customers in S17 and the surrounding area. Contact us to today to get a competitive ...
From £87,072
Need an Extension Builder in S17? Cortworth Millhouse Design & Build has been helping local clients (20 mile radius) with their extension builderin...
From £86,936
Dore Decor are a family run business with over 30 years experience - we offer an extensive range of building services and are able to provide a ful...
From £87,336
Blenheim Park Developments is an established and experienced local extension builder in S17. Please contact us for a free, no obligation quote and ...

Building a granny annexe ranges from £86,288 (JON WINDLE CONSTRUCTION based in S17) to £87,336 (Blenheim Park Developments based in S7), 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 S17 by posting a job with HaMuch. We will send it to extension builders in S17 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Dronfield | £35 | £288 |
| Granny Annexe near Sheffield | £34 | £280 |
| Granny Annexe near Chesterfield | £33 | £257 |
| Granny Annexe near Rotherham | £33 | £257 |
| Granny Annexe near Wickersley | £33 | £257 |
| Granny Annexe near Buxton | £30 | £230 |
| Granny Annexe near Worksop | £33 | £265 |
| Granny Annexe near Barnsley | £31 | £242 |
| Granny Annexe near Alfreton | £34 | £261 |
| Granny Annexe near Sutton-in-Ashfield | £33 | £265 |
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 - £17,546

Two storey extension - £88,070

Build a timber frame extension - £26,046

Build a swimming pool - £81,046

Single storey extension - £55,928

Side return extension - £42,022

Install an RSJ - £2,246

Outbuilding - £10,046

Build a Mansard loft conversion - £52,046

Loft conversion - £34,185

Build a kitchen extension - £42,046

Hip to gable loft conversion - £42,046

Granny annexe - £87,046

Garden office - £10,046

Convert a Garage - £16,046

Garage - £18,546

Build a flat roof extension - £22,046

Build a dormer loft conversion - £42,046

Concrete foundations - £6,296

Convert a bungalow loft - £29,046

Convert a basement - £38,022