Luke Rees
General Building Services (Southampton) Ltd is a trusted extension builder serving customers in SP11 and the surrounding area. Contact us to today ...
Experienced extension builder ready to quote for your work. CSY Construction Ltd is the best extension builder in SP11. No obligation free quotes a...
Jamie Brant
Trusted and professional extension builder in SP11. Experienced in all extension buildering work and keeping within budget and on quote. Brant Buil...
Experienced extension builder ready to quote for your work. Avalon Building Services Ltd is the best extension builder in SP11. No obligation free ...
D W BUILDERS is a trusted extension builder serving customers in SP11 and the surrounding area. Contact us to today to get a competitive quote for ...
Need to find an Extension Builder near you for all your extension buildering work?
M Warwick (Builders) provides a local, trusted extension...
J & M Building Services are here to help customers who need an Extension Builder in SP11. We offer a competitive rate to complete all your extensio...
Relax... you have found a reliable extension builder in SP11. Parkhouse Roofing is a friendly and reliable company based in SP11 who consider no jo...
Experienced extension builder ready to quote for your work. S & M Builders is the best extension builder in SP11. No obligation free quotes and man...
John McKinney Building is an established extension buildering business in SP11. We come highly recommended and provide competitive quotes for your ...

Outbuilding costs in SP11 range from the cheapest of £9,872 (General Building Services (Southampton) Ltd based in SO53) to the dearest of £10,432 (Brant Builders based in RG26), 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 SP11 by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Andover | £40 | £248 |
| Outbuilding near Test Valley | £37 | £261 |
| Outbuilding near Winchester | £37 | £266 |
| Outbuilding near Newbury | £37 | £262 |
| Outbuilding near Basingstoke & Deane | £39 | £273 |
| Outbuilding near Romsey | £32 | £230 |
| Outbuilding near Salisbury | £35 | £247 |
| Outbuilding near Thatcham | £38 | £266 |
| Outbuilding near Chandler's Ford | £34 | £245 |
| Outbuilding near Basingstoke | £39 | £274 |
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 - £17,666

Two storey extension - £88,250

Build a timber frame extension - £26,166

Build a swimming pool - £81,166

Single storey extension - £58,328

Side return extension - £43,372

Install an RSJ - £2,366

Outbuilding - £10,166

Build a Mansard loft conversion - £52,166

Loft conversion - £35,310

Build a kitchen extension - £42,166

Hip to gable loft conversion - £42,166

Granny annexe - £87,166

Garden office - £10,166

Convert a Garage - £16,166

Garage - £18,666

Build a flat roof extension - £22,166

Build a dormer loft conversion - £42,166

Concrete foundations - £6,416

Convert a bungalow loft - £29,166

Convert a basement - £39,372