From £10,152
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 £10,136
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 £10,312
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 £10,464
Feltham Group Services Limited is an established extension buildering business in SP1. We come highly recommended and provide competitive quotes fo...
From £10,040
Need an Extension Builder in SP1? BARTITIONS DESIGN & BUILD LTD has been helping local clients (20 mile radius) with their extension buildering jo...
From £10,104
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 £9,872
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 £10,208
STEWART BUILDERS is an established and experienced local extension builder in SP1. Please contact us for a free, no obligation quote and competitiv...
From £8,848
We specialise in Epoxy Resin and Polyurethane floor coatings and screeds (very durable and seamless flooring), designed for retail, factories, manu...

Outbuilding costs in SP1 range from the cheapest of £8,848 (Floortrak Limited based in SO51) to the dearest of £10,464 (Feltham Group Services Limited based in SP5), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in SP1 by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Salisbury | £35 | £247 |
| Outbuilding near Test Valley | £37 | £261 |
| Outbuilding near Romsey | £32 | £230 |
| Outbuilding near New Forest | £32 | £245 |
| Outbuilding near Andover | £40 | £248 |
| Outbuilding near Totton | £34 | £243 |
| Outbuilding near Chandler's Ford | £34 | £245 |
| Outbuilding near Eastleigh | £34 | £244 |
| Outbuilding near Devizes | £32 | £242 |
| Outbuilding 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