From £22,312
Shape Project Management is an established and experienced local extension builder in SP5. Please contact us for a free, no obligation quote and co...
From £22,152
Need an Extension Builder in SP5? Moores Build has been helping local clients (20 mile radius) with their extension buildering jobs for many years....
From £22,136
Arkson builders ltd is an established and experienced local extension builder in SP5. Please contact us for a free, no obligation quote and competi...
From £21,872
Need to find an Extension Builder near you for all your extension buildering work?
R F S BUILDERS provides a local, trusted extension build...
From £22,080
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,208
STEWART BUILDERS is an established and experienced local extension builder in SP5. Please contact us for a free, no obligation quote and competitiv...
From £22,144
Need to find an Extension Builder near you for all your extension buildering work?
MILESTONE BUILDING CONTRACTORS provides a local, trusted...
From £20,848
We specialise in Epoxy Resin and Polyurethane floor coatings and screeds (very durable and seamless flooring), designed for retail, factories, manu...
From £22,104
JJ Acquisitions ltd is a trusted extension builder serving customers in SP5 and the surrounding area. Contact us to today to get a competitive quot...

A flat roof extension ranges from the cheapest of £20,848 (Floortrak Limited based in SO51) to the dearest of £22,312 (Shape Project Management based in SP5), 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 SP5 by posting a job with HaMuch. We'll send it to extension builders in SP5.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Salisbury | £35 | £247 |
| Build A Flat Roof Extension near New Forest | £32 | £245 |
| Build A Flat Roof Extension near Romsey | £32 | £230 |
| Build A Flat Roof Extension near Test Valley | £37 | £261 |
| Build A Flat Roof Extension near Totton | £34 | £243 |
| Build A Flat Roof Extension near Chandler's Ford | £34 | £245 |
| Build A Flat Roof Extension near Eastleigh | £34 | £244 |
| Build A Flat Roof Extension near Southampton | £34 | £243 |
| Build A Flat Roof Extension near Andover | £40 | £248 |
| Build A Flat Roof Extension near Christchurch | £36 | £251 |
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 - £17,417

Two storey extension - £87,875

Build a timber frame extension - £25,917

Build a swimming pool - £80,917

Single storey extension - £53,336

Side return extension - £40,564

Install an RSJ - £2,117

Outbuilding - £9,917

Build a Mansard loft conversion - £51,917

Loft conversion - £32,970

Build a kitchen extension - £41,917

Hip to gable loft conversion - £41,917

Granny annexe - £86,917

Garden office - £9,917

Convert a Garage - £15,917

Garage - £18,417

Build a flat roof extension - £21,917

Build a dormer loft conversion - £41,917

Concrete foundations - £6,167

Convert a bungalow loft - £28,917

Convert a basement - £36,564