From £9,864
Trusted and professional extension builder in S21. Experienced in all extension buildering work and keeping within budget and on quote. MGG CONSTRU...
From £10,136
S. & A. Parsons (Building Contractors) Limited is a trusted extension builder serving customers in S21 and the surrounding area. Contact us to toda...
From £9,912
Oliver Wild Ltd is an established extension buildering business in S21. We come highly recommended and provide competitive quotes for your work.
From £10,184
Trusted and professional extension builder in S21. Experienced in all extension buildering work and keeping within budget and on quote. Maison Frai...
From £9,904
Looking to Transform Your Home Space?Maison Frais are Space Solution Specialists based in S. Yorkshire. We help TRANSFORM people's family homes to ...
From £9,856
C ROWLEY (SELFBUILD) is an established and experienced local extension builder in S21. Please contact us for a free, no obligation quote and compet...
From £10,344
Need to find an Extension Builder near you for all your extension buildering work?
JHM Property Services Ltd provides a local, trusted exte...
From £9,432
R Watson Builders are here to help customers who need an Extension Builder in S21. We offer a competitive rate to complete all your extension build...
From £10,336
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,000
Need an Extension Builder in S21? D H Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many years....

Outbuilding costs in S21 range from the cheapest of £9,432 (R Watson Builders based in S43) to the dearest of £10,344 (JHM Property Services Ltd based in S12), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in S21 by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Dronfield | £35 | £288 |
| Outbuilding near Chesterfield | £33 | £257 |
| Outbuilding near Sheffield | £34 | £280 |
| Outbuilding near Worksop | £33 | £265 |
| Outbuilding near Wickersley | £33 | £257 |
| Outbuilding near Rotherham | £33 | £257 |
| Outbuilding near Mansfield Woodhouse | £33 | £263 |
| Outbuilding near Forest Town | £33 | £263 |
| Outbuilding near Sutton-in-Ashfield | £33 | £265 |
| Outbuilding near Mansfield | £33 | £262 |
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 - £17,497

Two storey extension - £87,995

Build a timber frame extension - £25,997

Build a swimming pool - £80,997

Single storey extension - £54,936

Side return extension - £41,464

Install an RSJ - £2,197

Outbuilding - £9,997

Build a Mansard loft conversion - £51,997

Loft conversion - £33,720

Build a kitchen extension - £41,997

Hip to gable loft conversion - £41,997

Granny annexe - £86,997

Garden office - £9,997

Convert a Garage - £15,997

Garage - £18,497

Build a flat roof extension - £21,997

Build a dormer loft conversion - £41,997

Concrete foundations - £6,247

Convert a bungalow loft - £28,997

Convert a basement - £37,464