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Select your affordable PO18 extension builder
Gareth Higgins
Been in the building trade for over 30years .have in that time worked all over the country on many different projects.
Have city &...
Whites Carpentry & Building prides in delivering an excellent extension buildering service and value for money in PO18 and the surrounding areas. ...
A T Holmes & Son Chimney Sweep is a trusted extension builder serving customers in PO18 and the surrounding area. Contact us to today to get a comp...
From £21,824
Oak Constructions is a trusted extension builder serving customers in PO18 and the surrounding area. Contact us to today to get a competitive quote...
From £21,816
Bob Mousley
We offer a complete design and build service for middle to high end residential projects , no project to small . We work within a 15 mile radius of...
From £22,008
I'm Sarah Reed, Director at Ministry of the Interior. We are a unique company that provides full project management and interior design services ba...
From £22,320
James Capstick
Work in the Bosham,Emsworth,Chichester area,build large or small extensions,allworkmen are top tradesmen,very reliable,leave job area clean on comp...
From £21,792
Need an Extension Builder in PO18? Bespoke Living Construction Ltd has been helping local clients (20 mile radius) with their extension buildering ...
From £21,824
Hardbase Construction offer a complete or part package for any of your building, refurbishments or alteration requirements. Keeping an eye on times...
From £22,056
Experienced extension builder ready to quote for your work. 77 Build Ltd is the best extension builder in PO18. No obligation free quotes and many ...

A flat roof extension ranges from the cheapest of £21,776 (G P H BUILDERS LTD based in PO19) to the dearest of £22,320 (James Building Services based in PO18), 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 PO18 by posting a job with HaMuch. We'll send it to extension builders in PO18.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Chichester | £34 | £242 |
| 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 Bognor Regis | £35 | £247 |
| Build A Flat Roof Extension near Horndean | £36 | £254 |
| Build A Flat Roof Extension near Waterlooville | £36 | £250 |
| Build A Flat Roof Extension near Arun | £35 | £241 |
| Build A Flat Roof Extension near Portsmouth | £36 | £250 |
| Build A Flat Roof Extension near Littlehampton | £35 | £241 |
| Build A Flat Roof Extension near Rustington | £35 | £242 |
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 - £17,447

Two storey extension - £87,921

Build a timber frame extension - £25,947

Build a swimming pool - £80,947

Single storey extension - £53,944

Side return extension - £40,906

Install an RSJ - £2,147

Outbuilding - £9,947

Build a Mansard loft conversion - £51,947

Loft conversion - £33,255

Build a kitchen extension - £41,947

Hip to gable loft conversion - £41,947

Granny annexe - £86,947

Garden office - £9,947

Convert a Garage - £15,947

Garage - £18,447

Build a flat roof extension - £21,947

Build a dormer loft conversion - £41,947

Concrete foundations - £6,197

Convert a bungalow loft - £28,947

Convert a basement - £36,906