From £86,840
Trusted and professional extension builder in S66. Experienced in all extension buildering work and keeping within budget and on quote. Britishbuil...
From £86,968
Relax... you have found a reliable extension builder in S66. CS Construction & Conversions is a friendly and reliable company based in S66 who cons...
From £87,104
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,096
Trusted and professional extension builder in S66. Experienced in all extension buildering work and keeping within budget and on quote. urmum.co ha...
From £88,392
Green Exteriors Ltd are here to help customers who need an Extension Builder in S66. We offer a competitive rate to complete all your extension bui...
From £86,856
Relax... you have found a reliable extension builder in S66. Tep's Building Services is a friendly and reliable company based in S66 who consider n...
From £86,968
Based in Nottinghamshire, Lincolnshire Resolution Roofing Ltd** is a professional, reliable roofing company with unrivalled expertise in the indus...
From £87,160
Need an Extension Builder in S66? Property Plus has been helping local clients (20 mile radius) with their extension buildering jobs for many years...
From £87,184
Trusted and professional extension builder in S66. Experienced in all extension buildering work and keeping within budget and on quote. Maison Frai...
From £86,904
Looking to Transform Your Home Space?Maison Frais are Space Solution Specialists based in S. Yorkshire. We help TRANSFORM people's family homes to ...

Building a granny annexe ranges from £86,840 (Britishbuildogs based in S65) to £88,392 (Green Exteriors Ltd based in S60), 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 S66 by posting a job with HaMuch. We will send it to extension builders in S66 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Wickersley | £33 | £257 |
| Granny Annexe near Rotherham | £33 | £257 |
| Granny Annexe near Doncaster | £29 | £238 |
| Granny Annexe near Worksop | £33 | £265 |
| Granny Annexe near Sheffield | £34 | £280 |
| Granny Annexe near Dronfield | £35 | £288 |
| Granny Annexe near Bassetlaw | £31 | £243 |
| Granny Annexe near Barnsley | £31 | £242 |
| Granny Annexe near Retford | £31 | £243 |
| Granny Annexe near Chesterfield | £33 | £257 |
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 - £17,647

Two storey extension - £88,221

Build a timber frame extension - £26,147

Build a swimming pool - £81,147

Single storey extension - £57,944

Side return extension - £43,156

Install an RSJ - £2,347

Outbuilding - £10,147

Build a Mansard loft conversion - £52,147

Loft conversion - £35,130

Build a kitchen extension - £42,147

Hip to gable loft conversion - £42,147

Granny annexe - £87,147

Garden office - £10,147

Convert a Garage - £16,147

Garage - £18,647

Build a flat roof extension - £22,147

Build a dormer loft conversion - £42,147

Concrete foundations - £6,397

Convert a bungalow loft - £29,147

Convert a basement - £39,156