From £9,864
Need an Extension Builder in GL15? Milliner Construction has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £10,496
J D Plant Groundwork is a well established construction company providing value-added engineering, construction and service skills to customers for...
From £9,784
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £9,696
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £9,872
New Haven Construction Group Ltd is an established extension buildering business in GL15. We come highly recommended and provide competitive quotes...
From £9,760
The Green Team is an established and experienced local extension builder in GL15. Please contact us for a free, no obligation quote and competitive...
From £10,008
Gastropod Services is an established and experienced local extension builder in GL15. Please contact us for a free, no obligation quote and competi...
From £9,832
With the emphasis on saving energy and building homes which are sustainable for the future. CKL can help you with your project, from extensions, n...
From £9,912
Experienced extension builder ready to quote for your work. G & J BUILDING MAINTENANCE is the best extension builder in GL15. No obligation free qu...
From £10,024
I have been renovating sliding sash windows for over 20 years for a leading nationwide company. I was a team leader overseeing jobs from 1 bed apar...

Outbuilding costs in GL15 range from the cheapest of £9,696 (J R BUILDING LTD based in GL2) to the dearest of £10,496 (JD PLANT GRDWRK SPECIALIST LTD based in GL14), 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 GL15 by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Quedgeley | £32 | £247 |
| Outbuilding near Bradley Stoke | £34 | £259 |
| Outbuilding near Stroud | £33 | £249 |
| Outbuilding near Yate | £34 | £263 |
| Outbuilding near South Gloucestershire | £34 | £260 |
| Outbuilding near Gloucester | £31 | £236 |
| Outbuilding near Kingswood | £34 | £257 |
| Outbuilding near Clifton | £33 | £255 |
| Outbuilding near Bristol | £33 | £255 |
| Outbuilding near Portishead | £33 | £247 |
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 - £17,425

Two storey extension - £87,887

Build a timber frame extension - £25,925

Build a swimming pool - £80,925

Single storey extension - £53,496

Side return extension - £40,654

Install an RSJ - £2,125

Outbuilding - £9,925

Build a Mansard loft conversion - £51,925

Loft conversion - £33,045

Build a kitchen extension - £41,925

Hip to gable loft conversion - £41,925

Granny annexe - £86,925

Garden office - £9,925

Convert a Garage - £15,925

Garage - £18,425

Build a flat roof extension - £21,925

Build a dormer loft conversion - £41,925

Concrete foundations - £6,175

Convert a bungalow loft - £28,925

Convert a basement - £36,654