Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,832
Diamond Wight Building is an established and experienced local extension builder in PO36. Please contact us for a free, no obligation quote and com...
From £22,048
Brian Oxford
for a reliable friendly family business catering for the clients wishes.

A flat roof extension ranges from the cheapest of £21,768 (REDOAK HOMES based in PO36) to the dearest of £22,048 (B W Oxford Builder based in PO35), 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 PO36 by posting a job with HaMuch. We'll send it to extension builders in PO36.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Ryde | £34 | £255 |
| Build A Flat Roof Extension near Isle of Wight | £34 | £246 |
| Build A Flat Roof Extension near Gosport | £35 | £246 |
| Build A Flat Roof Extension near Lee-on-the-Solent | £35 | £249 |
| Build A Flat Roof Extension near Portsmouth | £36 | £250 |
| Build A Flat Roof Extension near Fareham | £35 | £250 |
| Build A Flat Roof Extension near Locks Heath | £33 | £240 |
| Build A Flat Roof Extension near Havant & Waterloo | £35 | £248 |
| Build A Flat Roof Extension near Havant | £35 | £249 |
| Build A Flat Roof Extension near Waterlooville | £36 | £250 |
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 - £17,362

Two storey extension - £87,793

Build a timber frame extension - £25,862

Build a swimming pool - £80,862

Single storey extension - £52,240

Side return extension - £39,948

Install an RSJ - £2,062

Outbuilding - £9,862

Build a Mansard loft conversion - £51,862

Loft conversion - £32,456

Build a kitchen extension - £41,862

Hip to gable loft conversion - £41,862

Granny annexe - £86,862

Garden office - £9,862

Convert a Garage - £15,862

Garage - £18,362

Build a flat roof extension - £21,862

Build a dormer loft conversion - £41,862

Concrete foundations - £6,112

Convert a bungalow loft - £28,862

Convert a basement - £35,948