From £38,760
Need to find an Extension Builder near you for all your extension buildering work?
J Pearson Building provides a local, trusted extension b...
From £34,710
Fitted Solutions was established in 2006 by founder Sam Fisher; with a promise to deliver exceptional craftmanship combined with first class custom...
From £36,420
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £35,970
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...
From £34,620
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...

Comparing extension builders estimates for a Convert a basement gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost to convert a basement in DE21 by posting a job with HaMuch and we will send it to extension builders in DE21.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Basement near Derby | £29 | £227 |
| Convert A Basement near Erewash | £31 | £234 |
| Convert A Basement near Ilkeston | £31 | £236 |
| Convert A Basement near Amber Valley | £32 | £244 |
| Convert A Basement near Belper | £32 | £244 |
| Convert A Basement near Heanor | £31 | £236 |
| Convert A Basement near Long Eaton | £32 | £249 |
| Convert A Basement near Ripley | £32 | £246 |
| Convert A Basement near Broxtowe | £34 | £240 |
| Convert A Basement near Nottingham | £34 | £241 |
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 - £17,375

Two storey extension - £87,813

Build a timber frame extension - £25,875

Build a swimming pool - £80,875

Single storey extension - £52,504

Side return extension - £40,096

Install an RSJ - £2,075

Outbuilding - £9,875

Build a Mansard loft conversion - £51,875

Loft conversion - £32,580

Build a kitchen extension - £41,875

Hip to gable loft conversion - £41,875

Granny annexe - £86,875

Garden office - £9,875

Convert a Garage - £15,875

Garage - £18,375

Build a flat roof extension - £21,875

Build a dormer loft conversion - £41,875

Concrete foundations - £6,125

Convert a bungalow loft - £28,875

Convert a basement - £36,096