Local DE21 extension builders
A J Construction
£28/hour
£213/day
A J Construction is an established and experienced local extension builder in DE21. Please contact us for a free, no obligation quote and competiti...
"Single storey extension" - DE22, job posted 26/08/26
Rowes Building Ltd
£35/hour
£269/day
Experienced extension builder ready to quote for your work. Rowes Building Ltd is the best extension builder in DE21. No obligation free quotes and...
"RSJ installation" - DERBY, job posted 28/04/26
Flying Tortise
£30/hour
£227/day
Relax... you have found a reliable extension builder in DE21. Flying Tortise is a friendly and reliable company based in DE21 who consider no job a...
"Loft conversion" - DERBY, job posted 16/01/26
BRICKON CONSTRUCTION LIMITED
£24/hour
£225/day
Need to find an Extension Builder near you for all your extension buildering work?
BRICKON CONSTRUCTION LIMITED provides a local, trusted e...
"Dormer loft conversion" - DERBY, job posted 24/09/25
J Pearson Building
£35/hour
£264/day
Need to find an Extension Builder near you for all your extension buildering work?
J Pearson Building provides a local, trusted extension b...
"Side return extension" - DERBY, job posted 22/08/25
Fitted Solutions Ltd
£30/hour
£219/day
Fitted Solutions was established in 2006 by founder Sam Fisher; with a promise to deliver exceptional craftmanship combined with first class custom...
"RSJ installation" - DERBY, job posted 11/07/25
Duffield Building Services Limited
£32/hour
£242/day
Need to find an Extension Builder near you for all your extension buildering work?
Duffield Building Services Limited provides a local, tru...
"Hip to gable loft conversion" - DE21, job posted 26/04/25
Fearn Property
£32/hour
£238/day
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Two storey extension" - DERBY, job posted 15/04/25
Refresh Renovations Derbyshire
£32/hour
£233/day
Nestled in the rolling hillside of the West Midlands, Derby is a city birthed by the Roman Empire, and grown in the industrial revolution. Initiall...
"Loft conversion" - DERBY, job posted 01/04/25
The Blackbrook Group
£30/hour
£218/day
The Blackbrook Group offers a one-stop shop for your construction project. We offer support from concept through to completion. We start with an in...
"Two storey extension" - DERBY, job posted 22/03/25
The most important thing is do avoid handing over cash or paying large sums in advance. Be wary of paying cash for a cheaper job, i.e. to avoid VAT, you may be going down a slippery slope of not doing things properly which may eventually mean your job is also not done properly.
Agree when you intend to pay, ideally after you are satisfied with the completed job. If it is a big job agree a schedule of staged payments which is fair to both parties.
To avoid bad tradespeople and to ensure you can find them should they not answer a mobile;
- Get proper contact details and check them yourself
- Check if the company is verified on the Companies House website
- Get phone details, ideally a land line or 0800 number and check it
- Get a physical office address
Get quotes in writing by email or in person if possible. Getting quotes online or by text is ok (make sure you accept the offer by replying). For large projects make a written agreement, schedule of works and snagging plans as part of a working document. Also;
- Agree expected quality of workmanship and materials in advance
- When will work start and when will project be finished, what happens if project over runs ?
- How long is the guarantee on work and materials eg 12 months
- Discuss onsite behaviour in advance (no smoking, swearing or using mobile phones for non-work purposes)
- Agree that your Extension Builder will remove all debris and rubbish and what level of tidying up you want after job
Compare DE21 extension builders rates
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Extension Builders near Derby | £30 | £228 |
| Extension Builders near Erewash | £31 | £233 |
| Extension Builders near Ilkeston | £31 | £235 |
| Extension Builders near Amber Valley | £31 | £238 |
| Extension Builders near Belper | £32 | £244 |
| Extension Builders near Heanor | £31 | £236 |
| Extension Builders near Long Eaton | £32 | £248 |
| Extension Builders near Ripley | £32 | £246 |
| Extension Builders near Broxtowe | £33 | £240 |
| Extension Builders near Nottingham | £34 | £241 |
Job estimates from extension builders near you
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.
Build a timber frame extension - £25,880
Garden office - £9,880
Granny annexe - £86,880
Build a flat roof extension - £21,880
Convert a Garage - £15,880
Hip to gable loft conversion - £41,880
Convert a bungalow loft - £28,880
Build a dormer loft conversion - £41,880
Build a swimming pool - £80,880
Build a Mansard loft conversion - £51,880
Concrete foundations - £6,130
Underpin a building - £17,380
Two storey extension - £87,820
Convert a basement - £36,150
Side return extension - £40,150
Loft conversion - £32,625
Garage - £18,380
Single storey extension - £52,600
Outbuilding - £9,880
Install an RSJ - £2,080
Build a kitchen extension - £41,880
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