From £86,968
Relax... you have found a reliable extension builder in S1. CS Construction & Conversions is a friendly and reliable company based in S1 who consid...
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 £86,936
Trusted and professional extension builder in S1. Experienced in all extension buildering work and keeping within budget and on quote. Merebrook Co...
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 £87,112
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,344
Trusted and professional extension builder in S1. Experienced in all extension buildering work and keeping within budget and on quote. AMB Joinery ...
From £87,088
Hallamshire Paving is an established and experienced local extension builder in S1. Please contact us for a free, no obligation quote and competiti...
From £86,984
BP Builders are here to help customers who need an Extension Builder in S1. We offer a competitive rate to complete all your extension buildering j...
From £86,864
Trusted and professional extension builder in S1. Experienced in all extension buildering work and keeping within budget and on quote. MGG CONSTRUC...

Building a granny annexe ranges from £86,288 (JON WINDLE CONSTRUCTION based in S17) to £87,344 (AMB Joinery & Building Services based in S8), 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 S1 by posting a job with HaMuch. We will send it to extension builders in S1 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Sheffield | £32 | £261 |
| Granny Annexe near Dronfield | £33 | £262 |
| Granny Annexe near Rotherham | £33 | £257 |
| Granny Annexe near Wickersley | £33 | £257 |
| Granny Annexe near Chesterfield | £33 | £257 |
| Granny Annexe near Barnsley | £31 | £242 |
| Granny Annexe near Worksop | £33 | £265 |
| Granny Annexe near Doncaster | £29 | £238 |
| Granny Annexe near Mansfield Woodhouse | £33 | £263 |
| Granny Annexe near Holmfirth | £30 | £232 |
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 - £17,453

Two storey extension - £87,929

Build a timber frame extension - £25,953

Build a swimming pool - £80,953

Single storey extension - £54,056

Side return extension - £40,969

Install an RSJ - £2,153

Outbuilding - £9,953

Build a Mansard loft conversion - £51,953

Loft conversion - £33,308

Build a kitchen extension - £41,953

Hip to gable loft conversion - £41,953

Granny annexe - £86,953

Garden office - £9,953

Convert a Garage - £15,953

Garage - £18,453

Build a flat roof extension - £21,953

Build a dormer loft conversion - £41,953

Concrete foundations - £6,203

Convert a bungalow loft - £28,953

Convert a basement - £36,969