From £21,832
J D Holland Building Services is a trusted extension builder serving customers in FY6 and the surrounding area. Contact us to today to get a compet...
From £21,496
COASTAL CONSTRUCTION LTD is an established and experienced local extension builder in FY6. Please contact us for a free, no obligation quote and co...
From £21,544
Need to find an Extension Builder near you for all your extension buildering work?
Poulton Building & Joinery Services provides a local, tr...
From £21,648
JSM BUILDING SOLUTIONS LIMITED is a trusted extension builder serving customers in FY6 and the surrounding area. Contact us to today to get a compe...
From £21,648
Interbuild is an established extension buildering business in FY6. We come highly recommended and provide competitive quotes for your work.
From £21,496
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,824
We do it all from plan to completion
25 yrs and no complaints ..
modern and contemporary
kitchen bathrooms
From £21,632
TECH BUILDING limited is an established extension buildering business in FY6. We come highly recommended and provide competitive quotes for your wo...
From £21,784
Relax... you have found a reliable extension builder in FY6. Rps property services Ltd is a friendly and reliable company based in FY6 who consider...

A flat roof extension ranges from the cheapest of £21,496 (COASTAL CONSTRUCTION LTD based in FY5) to the dearest of £21,832 (J D Holland Building Services based in FY5), 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 FY6 by posting a job with HaMuch. We'll send it to extension builders in FY6.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Fleetwood | £28 | £206 |
| Build A Flat Roof Extension near Blackpool | £29 | £209 |
| Build A Flat Roof Extension near Lytham St Annes | £28 | £206 |
| Build A Flat Roof Extension near Fulwood | £31 | £217 |
| Build A Flat Roof Extension near Penwortham | £30 | £218 |
| Build A Flat Roof Extension near Preston | £30 | £219 |
| Build A Flat Roof Extension near Lancaster | £25 | £211 |
| Build A Flat Roof Extension near Morecambe | £25 | £212 |
| Build A Flat Roof Extension near Bamber Bridge | £30 | £217 |
| Build A Flat Roof Extension near Southport | £27 | £198 |
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 - £17,150

Two storey extension - £87,476

Build a timber frame extension - £25,650

Build a swimming pool - £80,650

Single storey extension - £48,008

Side return extension - £37,567

Install an RSJ - £1,850

Outbuilding - £9,650

Build a Mansard loft conversion - £51,650

Loft conversion - £30,473

Build a kitchen extension - £41,650

Hip to gable loft conversion - £41,650

Granny annexe - £86,650

Garden office - £9,650

Convert a Garage - £15,650

Garage - £18,150

Build a flat roof extension - £21,650

Build a dormer loft conversion - £41,650

Concrete foundations - £5,900

Convert a bungalow loft - £28,650

Convert a basement - £33,567