From £22,488
Need an Extension Builder in North Hertfordshire? M SPINDLER CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension ...
From £22,208
Need an Extension Builder in North Hertfordshire? WILLMOTT DIXON CONSTRUCTION LI has been helping local clients (20 mile radius) with their extensi...
From £22,128
Draincall Services Ltd is a trusted extension builder serving customers in North Hertfordshire and the surrounding area. Contact us to today to get...
From £22,168
Need an Extension Builder in North Hertfordshire? Gilbert & Gregson Construction Ltd has been helping local clients (20 mile radius) with their ext...
From £22,320
Totalworth Building Services is an established extension buildering business in North Hertfordshire. We come highly recommended and provide competi...
From £22,168
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,408
M P BUILDING LIMITED is an established and experienced local extension builder in North Hertfordshire. Please contact us for a free, no obligation ...
From £22,232
We are a local roofing company offering a complete roofing service.We provide one of the most cost effective, reliable roofing services in and ...
From £21,704
Need an Extension Builder in North Hertfordshire? L P L Property Services Limited has been helping local clients (20 mile radius) with their extens...
From £22,160
Experienced extension builder ready to quote for your work. Precision Roofing & Building Maintenance is the best extension builder in North Hertfor...

A flat roof extension ranges from the cheapest of £21,704 (L P L Property Services Limited based in SG5) to the dearest of £22,488 (M SPINDLER CONSTRUCTION LTD based in SG6), 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 North Hertfordshire by posting a job with HaMuch. We'll send it to extension builders in North Hertfordshire.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near North Hertfordshire | £44 | £283 |
| Build A Flat Roof Extension near Letchworth | £44 | £283 |
| Build A Flat Roof Extension near Hitchin | £43 | £283 |
| Build A Flat Roof Extension near Stevenage | £44 | £282 |
| Build A Flat Roof Extension near East Hertfordshire | £44 | £289 |
| Build A Flat Roof Extension near Biggleswade | £41 | £268 |
| Build A Flat Roof Extension near Luton | £41 | £278 |
| Build A Flat Roof Extension near Mid Bedfordshire | £42 | £276 |
| Build A Flat Roof Extension near Welwyn Garden City | £42 | £268 |
| Build A Flat Roof Extension near Harpenden | £86 | £315 |
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 - £17,698

Two storey extension - £88,298

Build a timber frame extension - £26,198

Build a swimming pool - £81,198

Single storey extension - £58,968

Side return extension - £43,732

Install an RSJ - £2,398

Outbuilding - £10,198

Build a Mansard loft conversion - £52,198

Loft conversion - £35,610

Build a kitchen extension - £42,198

Hip to gable loft conversion - £42,198

Granny annexe - £87,198

Garden office - £10,198

Convert a Garage - £16,198

Garage - £18,698

Build a flat roof extension - £22,198

Build a dormer loft conversion - £42,198

Concrete foundations - £6,448

Convert a bungalow loft - £29,198

Convert a basement - £39,732