Fishers Building & Paving Ltd is an established extension buildering business in BL5. We come highly recommended and provide competitive quotes for...
Need an Extension Builder in BL5? CB BUILDING & JOINERY LTD has been helping local clients (20 mile radius) with their extension buildering jobs fo...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
PETER BALDWIN BUILDERS is an established extension buildering business in BL5. We come highly recommended and provide competitive quotes for your w...
HAROLD ROBINSON
HAROLDS CORP is a trusted extension builder serving customers in BL5 and the surrounding area. Contact us to today to get a competitive quote for e...
Andrew Smethurst
APS pointing and property maintenance offers a complete building service from small patch pointing to full refurb or extensions. Competitiv...
From £22,000
SBA Facilities is a family run business founded by Director, Josef who has over 25 years of experience with the corporate, commercial, and domestic...
From £21,736
Lostock Design & Build Limited is an established and experienced local extension builder in BL5. Please contact us for a free, no obligation quote ...
From £22,032
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,688
Lostock Design & Build is an established and experienced local extension builder in BL5. Please contact us for a free, no obligation quote and comp...

A flat roof extension ranges from the cheapest of £21,456 (Aps pointing and property maintenance based in WN2) to the dearest of £22,048 (HAROLDS CORP based in WN2), 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 BL5 by posting a job with HaMuch. We'll send it to extension builders in BL5.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Westhoughton | £31 | £222 |
| Build A Flat Roof Extension near Atherton | £31 | £223 |
| Build A Flat Roof Extension near Hindley | £30 | £219 |
| Build A Flat Roof Extension near Horwich | £30 | £219 |
| Build A Flat Roof Extension near Leigh | £31 | £224 |
| Build A Flat Roof Extension near Bolton | £31 | £219 |
| Build A Flat Roof Extension near Little Hulton | £31 | £220 |
| Build A Flat Roof Extension near Farnworth | £30 | £219 |
| Build A Flat Roof Extension near Wigan | £30 | £220 |
| Build A Flat Roof Extension near Golborne | £30 | £222 |
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 - £17,303

Two storey extension - £87,705

Build a timber frame extension - £25,803

Build a swimming pool - £80,803

Single storey extension - £51,064

Side return extension - £39,286

Install an RSJ - £2,003

Outbuilding - £9,803

Build a Mansard loft conversion - £51,803

Loft conversion - £31,905

Build a kitchen extension - £41,803

Hip to gable loft conversion - £41,803

Granny annexe - £86,803

Garden office - £9,803

Convert a Garage - £15,803

Garage - £18,303

Build a flat roof extension - £21,803

Build a dormer loft conversion - £41,803

Concrete foundations - £6,053

Convert a bungalow loft - £28,803

Convert a basement - £35,286