From £22,144
Need to find an Extension Builder near you for all your extension buildering work?
TPJ Building Ltd provides a local, trusted extension bui...
From £22,224
LTM Construction is an established and experienced local extension builder in East Hertfordshire. Please contact us for a free, no obligation quote...
From £22,328
Reid James is a family run Building and Construction company based in Ware, Hertfordshire who cover all areas in London, Essex, Cambridge, and Bedf...
From £22,456
Steve Rolt Home Improvements Ltd was founded in 2016 in Buntingford, Hertfordshire, and from small beginnings, has gone from stren...
From £22,504
WALKERN CONSTRUCTION LIMITED is an established and experienced local extension builder in East Hertfordshire. Please contact us for a free, no obli...
From £22,456
Relax... you have found a reliable extension builder in East Hertfordshire. Up and Out Builds Ltd is a friendly and reliable company based in East ...
From £22,320
Bournes Projects LTD is an established and experienced local extension builder in East Hertfordshire. Please contact us for a free, no obligation q...
From £22,096
Relax... you have found a reliable extension builder in East Hertfordshire. GB Build is a friendly and reliable company based in East Hertfordshire...
From £22,232
Need an Extension Builder in East Hertfordshire? JK Character Construction Ltd has been helping local clients (20 mile radius) with their extension...
From £22,160
Experienced extension builder ready to quote for your work. Precision Roofing & Building Maintenance is the best extension builder in East Hertford...

A flat roof extension ranges from the cheapest of £22,096 (GB Build based in SG2) to the dearest of £22,504 (WALKERN CONSTRUCTION LIMITED based in SG2), 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 East Hertfordshire by posting a job with HaMuch. We'll send it to extension builders in East Hertfordshire.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near East Hertfordshire | £44 | £289 |
| Build A Flat Roof Extension near Ware | £47 | £296 |
| Build A Flat Roof Extension near Hertford | £46 | £289 |
| Build A Flat Roof Extension near Stevenage | £44 | £282 |
| Build A Flat Roof Extension near North Hertfordshire | £44 | £283 |
| Build A Flat Roof Extension near Welwyn Garden City | £42 | £268 |
| Build A Flat Roof Extension near Hoddesdon | £46 | £296 |
| Build A Flat Roof Extension near Hitchin | £43 | £283 |
| Build A Flat Roof Extension near Letchworth | £44 | £283 |
| Build A Flat Roof Extension near Bishop's Stortford | £42 | £264 |
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 - £17,792

Two storey extension - £88,438

Build a timber frame extension - £26,292

Build a swimming pool - £81,292

Single storey extension - £60,840

Side return extension - £44,785

Install an RSJ - £2,492

Outbuilding - £10,292

Build a Mansard loft conversion - £52,292

Loft conversion - £36,488

Build a kitchen extension - £42,292

Hip to gable loft conversion - £42,292

Granny annexe - £87,292

Garden office - £10,292

Convert a Garage - £16,292

Garage - £18,792

Build a flat roof extension - £22,292

Build a dormer loft conversion - £42,292

Concrete foundations - £6,542

Convert a bungalow loft - £29,292

Convert a basement - £40,785