From £39,210
Need an Extension Builder in SP1? Moores Build has been helping local clients (20 mile radius) with their extension buildering jobs for many years....
From £39,030
Arkson builders ltd is an established and experienced local extension builder in SP1. Please contact us for a free, no obligation quote and competi...
From £41,010
Shape Project Management is an established and experienced local extension builder in SP1. Please contact us for a free, no obligation quote and co...
From £42,720
Feltham Group Services Limited is an established extension buildering business in SP1. We come highly recommended and provide competitive quotes fo...
From £37,950
Need an Extension Builder in SP1? BARTITIONS DESIGN & BUILD LTD has been helping local clients (20 mile radius) with their extension buildering jo...
From £38,670
JJ Acquisitions ltd is a trusted extension builder serving customers in SP1 and the surrounding area. Contact us to today to get a competitive quot...
From £36,060
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 £39,840
STEWART BUILDERS is an established and experienced local extension builder in SP1. Please contact us for a free, no obligation quote and competitiv...
From £24,540
We specialise in Epoxy Resin and Polyurethane floor coatings and screeds (very durable and seamless flooring), designed for retail, factories, manu...

Comparing extension builders estimates for a Convert a basement gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost to convert a basement in SP1 by posting a job with HaMuch and we will send it to extension builders in SP1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Basement near Salisbury | £35 | £247 |
| Convert A Basement near Test Valley | £37 | £261 |
| Convert A Basement near Romsey | £32 | £230 |
| Convert A Basement near New Forest | £32 | £245 |
| Convert A Basement near Andover | £40 | £248 |
| Convert A Basement near Totton | £34 | £243 |
| Convert A Basement near Chandler's Ford | £34 | £245 |
| Convert A Basement near Eastleigh | £34 | £244 |
| Convert A Basement near Devizes | £32 | £242 |
| Convert A Basement near Southampton | £34 | £243 |
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 - £17,445

Two storey extension - £87,917

Build a timber frame extension - £25,945

Build a swimming pool - £80,945

Single storey extension - £53,896

Side return extension - £40,879

Install an RSJ - £2,145

Outbuilding - £9,945

Build a Mansard loft conversion - £51,945

Loft conversion - £33,233

Build a kitchen extension - £41,945

Hip to gable loft conversion - £41,945

Granny annexe - £86,945

Garden office - £9,945

Convert a Garage - £15,945

Garage - £18,445

Build a flat roof extension - £21,945

Build a dormer loft conversion - £41,945

Concrete foundations - £6,195

Convert a bungalow loft - £28,945

Convert a basement - £36,879