From £22,088
Relax... you have found a reliable extension builder in Lee-on-the-solent. BRIAN NEWLYN BUILDERS is a friendly and reliable company based in Lee-on...
From £21,976
O NEILL CONSTRUCTION LTD is an established extension buildering business in Lee-on-the-solent. We come highly recommended and provide competitive q...
From £22,016
HISTORIC BUILD RESTORATION LTD are here to help customers who need an Extension Builder in Lee-on-the-solent. We offer a competitive rate to comple...
From £21,928
Relax... you have found a reliable extension builder in Lee-on-the-solent. MA Builders is a friendly and reliable company based in Lee-on-the-solen...
From £21,936
Trusted and professional extension builder in Lee-on-the-solent. Experienced in all extension buildering work and keeping within budget and on quot...
From £22,000
We are experts in cavity wall insulation, cavity wall insulation removal, loft insulation, loft boarding, room in roof insulation, chemical damp pr...
From £21,752
Allweather Building Services Ltd are here to help customers who need an Extension Builder in Lee-on-the-solent. We offer a competitive rate to comp...
From £21,936
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,872
Need an Extension Builder in Lee-on-the-solent? GRL Building Services Ltd has been helping local clients (20 mile radius) with their extension buil...

A flat roof extension ranges from the cheapest of £21,752 (Allweather Building Services Ltd based in PO12) to the dearest of £22,088 (BRIAN NEWLYN BUILDERS based in PO13), 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 Lee-on-the-solent by posting a job with HaMuch. We'll send it to extension builders in Lee-on-the-solent.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Lee-on-the-Solent | £35 | £249 |
| Build A Flat Roof Extension near Gosport | £35 | £246 |
| Build A Flat Roof Extension near Fareham | £35 | £250 |
| Build A Flat Roof Extension near Portsmouth | £36 | £250 |
| Build A Flat Roof Extension near Locks Heath | £33 | £240 |
| Build A Flat Roof Extension near Isle of Wight | £34 | £246 |
| Build A Flat Roof Extension near Hedge End | £34 | £244 |
| 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 |
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 - £17,433

Two storey extension - £87,899

Build a timber frame extension - £25,933

Build a swimming pool - £80,933

Single storey extension - £53,656

Side return extension - £40,744

Install an RSJ - £2,133

Outbuilding - £9,933

Build a Mansard loft conversion - £51,933

Loft conversion - £33,120

Build a kitchen extension - £41,933

Hip to gable loft conversion - £41,933

Granny annexe - £86,933

Garden office - £9,933

Convert a Garage - £15,933

Garage - £18,433

Build a flat roof extension - £21,933

Build a dormer loft conversion - £41,933

Concrete foundations - £6,183

Convert a bungalow loft - £28,933

Convert a basement - £36,744