James Davis
J D Plant Groundwork is a well established construction company providing value-added engineering, construction and service skills to customers for...
Daniel Greathead
lydney, GL14
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,864
Need an Extension Builder in Lydney? Milliner Construction has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £21,696
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

A flat roof extension ranges from the cheapest of £21,696 (J R BUILDING LTD based in GL2) to the dearest of £22,496 (JD PLANT GRDWRK SPECIALIST LTD based in GL14), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in Lydney by posting a job with HaMuch. We'll send it to extension builders in Lydney.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Quedgeley | £31 | £247 |
| Build A Flat Roof Extension near Bradley Stoke | £34 | £259 |
| Build A Flat Roof Extension near Stroud | £33 | £249 |
| Build A Flat Roof Extension near Yate | £34 | £263 |
| Build A Flat Roof Extension near South Gloucestershire | £34 | £260 |
| Build A Flat Roof Extension near Gloucester | £30 | £235 |
| Build A Flat Roof Extension near Kingswood | £34 | £257 |
| Build A Flat Roof Extension near Clifton | £33 | £255 |
| Build A Flat Roof Extension near Bristol | £33 | £255 |
| Build A Flat Roof Extension 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 - £17,460

Two storey extension - £87,940

Build a timber frame extension - £25,960

Build a swimming pool - £80,960

Single storey extension - £54,200

Side return extension - £41,050

Install an RSJ - £2,160

Outbuilding - £9,960

Build a Mansard loft conversion - £51,960

Loft conversion - £33,375

Build a kitchen extension - £41,960

Hip to gable loft conversion - £41,960

Granny annexe - £86,960

Garden office - £9,960

Convert a Garage - £15,960

Garage - £18,460

Build a flat roof extension - £21,960

Build a dormer loft conversion - £41,960

Concrete foundations - £6,210

Convert a bungalow loft - £28,960

Convert a basement - £37,050