Rob Butler
Need to find an Extension Builder near you for all your extension buildering work?
Oakstone Developments provides a local, trusted extensio...
Experienced extension builder ready to quote for your work. Shepperd Developments is the best extension builder in PO6. No obligation free quotes a...
JKS Property is an established and experienced local extension builder in PO6. Please contact us for a free, no obligation quote and competitive ra...
Experienced extension builder ready to quote for your work. JM Roofing & Building Services is the best extension builder in PO6. No obligation free...
Relax... you have found a reliable extension builder in PO6. SLG Mills Building Services is a friendly and reliable company based in PO6 who consid...
Steve Harris
Hi my name is Steve harris of hb builders we are based in portchester and have over 40 years of experience in the building trade we would be mor...
Jason Wall
Build Light Group is an established and experienced local extension builder in PO6. Please contact us for a free, no obligation quote and competiti...
Relax... you have found a reliable extension builder in PO6. Bribern Property Services is a friendly and reliable company based in PO6 who consider...
Experienced extension builder ready to quote for your work. A G Builders is the best extension builder in PO6. No obligation free quotes and many h...
Thermic Homes is an energy-saving home improvement company operating out of the south coast of England. Our mission is to create warmer homes for t...

A flat roof extension ranges from the cheapest of £21,728 (A G Builders based in PO2) to the dearest of £22,304 (Thermic Homes based in PO16), 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 PO6 by posting a job with HaMuch. We'll send it to extension builders in PO6.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Portsmouth | £36 | £250 |
| Build A Flat Roof Extension near Waterlooville | £36 | £250 |
| 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 Gosport | £35 | £246 |
| Build A Flat Roof Extension near Horndean | £36 | £254 |
| Build A Flat Roof Extension near Fareham | £35 | £250 |
| Build A Flat Roof Extension near Lee-on-the-Solent | £35 | £249 |
| Build A Flat Roof Extension near Ryde | £34 | £255 |
| Build A Flat Roof Extension near Locks Heath | £33 | £240 |
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 - £17,494

Two storey extension - £87,992

Build a timber frame extension - £25,994

Build a swimming pool - £80,994

Single storey extension - £54,888

Side return extension - £41,437

Install an RSJ - £2,194

Outbuilding - £9,994

Build a Mansard loft conversion - £51,994

Loft conversion - £33,698

Build a kitchen extension - £41,994

Hip to gable loft conversion - £41,994

Granny annexe - £86,994

Garden office - £9,994

Convert a Garage - £15,994

Garage - £18,494

Build a flat roof extension - £21,994

Build a dormer loft conversion - £41,994

Concrete foundations - £6,244

Convert a bungalow loft - £28,994

Convert a basement - £37,437