From £9,720
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £9,784
Lancashire, BB1
Need to find an Extension Builder near you for all your extension buildering work?
D Parker Design & Build provides a local, trusted extens...
From £9,856
Lancashire, BB1
Need an Extension Builder in Lancashire? Smart building solutions Blackburn ltd has been helping local clients (20 mile radius) with their extensio...
From £9,712
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £9,624
WM Brickwork & Pointing are here to help customers who need an Extension Builder in Lancashire. We offer a competitive rate to complete all your ex...
From £9,928
M. Pickering Builder & Joiner is a trusted extension builder serving customers in Lancashire and the surrounding area. Contact us to today to get a...
From £9,736
Need to find an Extension Builder near you for all your extension buildering work?
East Lancs Construction Ltd provides a local, trusted ex...
From £9,816
BRYAN LEE BUILDING CONST LTD is an established and experienced local extension builder in Lancashire. Please contact us for a free, no obligation q...
From £9,728
Lonsdale Construction is a trusted extension builder serving customers in Lancashire and the surrounding area. Contact us to today to get a competi...
From £9,808
Need to find an Extension Builder near you for all your extension buildering work?
J. Grimshaw provides a local, trusted extension builderi...

Garden offices range from the cheapest of £9,624 (WM Brickwork & Pointing based in BB1) to the dearest of £9,928 (M. Pickering Builder & Joiner based in BB2), but these are only estimates.
The best way to compare costs is to get actual quotes.
Get rates and quotes to build a garden office in Lancashire by posting a job with HaMuch. We'll send it to extension builders in Lancashire.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Blackburn | £33 | £246 |
| Garden Office near Accrington | £33 | £243 |
| Garden Office near Darwen | £34 | £253 |
| Garden Office near Rawtenstall | £29 | £213 |
| Garden Office near Bamber Bridge | £30 | £216 |
| Garden Office near Chorley | £30 | £221 |
| Garden Office near Burnley | £29 | £219 |
| Garden Office near Preston | £30 | £218 |
| Garden Office near Leyland | £30 | £223 |
| Garden Office near Fulwood | £31 | £217 |
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 - £17,271

Two storey extension - £87,657

Build a timber frame extension - £25,771

Build a swimming pool - £80,771

Single storey extension - £50,424

Side return extension - £38,926

Install an RSJ - £1,971

Outbuilding - £9,771

Build a Mansard loft conversion - £51,771

Loft conversion - £31,605

Build a kitchen extension - £41,771

Hip to gable loft conversion - £41,771

Granny annexe - £86,771

Garden office - £9,771

Convert a Garage - £15,771

Garage - £18,271

Build a flat roof extension - £21,771

Build a dormer loft conversion - £41,771

Concrete foundations - £6,021

Convert a bungalow loft - £28,771

Convert a basement - £34,926