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Seerey and Smith Building Solutions
John Smoth
Trusted and professional extension builder in Derby. Experienced in all extension buildering work and keeping within budget and on quote. Seerey an...
"Single storey extension" - DE3, job posted 01/09/26
Alan Askey Builder
Alsn Askey
Experienced extension builder ready to quote for your work. Alan Askey Builder is the best extension builder in Derby. No obligation free quotes an...
"Single storey extension" - DE22, job posted 26/08/26
£32/hr
£237/day
Derbyshire Bathrooms & Kitchens Ltd
Derbyshire Bathrooms & Kitchens Ltd is an established and experienced local extension builder in Derby. Please contact us for a free, no obligation...
"RSJ installation" - DERBY, job posted 28/04/26
£35/hr
£264/day
J Pearson Building
Need to find an Extension Builder near you for all your extension buildering work?
J Pearson Building provides a local, trusted extension b...
"Loft conversion" - DERBY, job posted 16/01/26
£32/hr
£238/day
Fearn Property
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Dormer loft conversion" - DERBY, job posted 24/09/25
£30/hr
£219/day
Fitted Solutions Ltd
Fitted Solutions was established in 2006 by founder Sam Fisher; with a promise to deliver exceptional craftmanship combined with first class custom...
"Side return extension" - DERBY, job posted 22/08/25
£30/hr
£218/day
The Blackbrook Group
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...
"RSJ installation" - DERBY, job posted 11/07/25
£32/hr
£233/day
Refresh Renovations Derbyshire
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...
"Hip to gable loft conversion" - DE21, job posted 26/04/25
£30/hr
£222/day
Lifestyle Windows and Conservatories
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
£28/hr
£206/day
REYNOLDS BUILDING SERVICES LTD
Experienced extension builder ready to quote for your work. REYNOLDS BUILDING SERVICES LTD is the best extension builder in Derby. No obligation fr...
"Loft conversion" - DERBY, job posted 01/04/25
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 Derby extension builders rates
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Extension Builders near Derby | £29 | £227 |
| Extension Builders near Erewash | £31 | £234 |
| Extension Builders near Amber Valley | £32 | £244 |
| Extension Builders near Belper | £32 | £244 |
| Extension Builders near Ilkeston | £31 | £236 |
| Extension Builders near Heanor | £31 | £236 |
| Extension Builders near Long Eaton | £32 | £249 |
| Extension Builders near Ripley | £32 | £246 |
| Extension Builders near Broxtowe | £34 | £240 |
| Extension Builders near Burton upon Trent | £33 | £257 |
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 - £25,864
Garden office - £9,864
Granny annexe - £86,864
Build a flat roof extension - £21,864
Convert a Garage - £15,864
Hip to gable loft conversion - £41,864
Convert a bungalow loft - £28,864
Build a dormer loft conversion - £41,864
Build a swimming pool - £80,864
Build a Mansard loft conversion - £51,864
Concrete foundations - £6,114
Underpin a building - £17,364
Two storey extension - £87,796
Convert a basement - £35,970
Side return extension - £39,970
Loft conversion - £32,475
Garage - £18,364
Single storey extension - £52,280
Outbuilding - £9,864
Install an RSJ - £2,064
Build a kitchen extension - £41,864
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