From £22,008
Whites Carpentry & Building prides in delivering an excellent extension buildering service and value for money in PO13 and the surrounding areas. ...
From £23,096
We are a Small Family run business with over 30 years experience in the building trade, Carpentry is my main trade, with NVQ Level 2.
From £22,144
We are a small family run business with over 20 years experience in brickwork, bathroom/kitchen fitting, roofing, landscaping, fencing, tiling and ...
From £21,752
Park Building Services Ltd is a trusted extension builder serving customers in PO13 and the surrounding area. Contact us to today to get a competit...
From £22,056
K A Griffin General Builder is an established extension buildering business in PO13. We come highly recommended and provide competitive quotes for ...
From £21,776
Been in the building trade for over 30years .have in that time worked all over the country on many different projects.
Have city &...
From £21,768
TP Developments are here to help customers who need an Extension Builder in PO13. We offer a competitive rate to complete all your extension builde...
From £22,144
Bailey Construction Services are here to help customers who need an Extension Builder in PO13. We offer a competitive rate to complete all your ext...
From £21,752
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,120
Need to find an Extension Builder near you for all your extension buildering work?
Mobile Services provides a local, trusted extension buil...

A flat roof extension ranges from the cheapest of £21,752 (Park Building Services Ltd based in PO9) to the dearest of £23,096 (R&B Property Improvements based in PO9), 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 PO13 by posting a job with HaMuch. We'll send it to extension builders in PO13.
| 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 Ryde | £34 | £255 |
| Build A Flat Roof Extension near Locks Heath | £33 | £240 |
| 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 Hedge End | £34 | £244 |
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 - £17,562

Two storey extension - £88,092

Build a timber frame extension - £26,062

Build a swimming pool - £81,062

Single storey extension - £56,232

Side return extension - £42,193

Install an RSJ - £2,262

Outbuilding - £10,062

Build a Mansard loft conversion - £52,062

Loft conversion - £34,328

Build a kitchen extension - £42,062

Hip to gable loft conversion - £42,062

Granny annexe - £87,062

Garden office - £10,062

Convert a Garage - £16,062

Garage - £18,562

Build a flat roof extension - £22,062

Build a dormer loft conversion - £42,062

Concrete foundations - £6,312

Convert a bungalow loft - £29,062

Convert a basement - £38,193