From £10,192
Trusted and professional extension builder in SO31. Experienced in all extension buildering work and keeping within budget and on quote. A W PAVING...
From £9,920
We were incorporated in 2015 and have been providing a level of service to our clients that is unparalleled, using knowledge built from 20+ years w...
From £9,960
ROB DINE CONSTRUCTION is an established and experienced local extension builder in SO31. Please contact us for a free, no obligation quote and comp...
From £10,120
Need to find an Extension Builder near you for all your extension buildering work?
Mobile Services provides a local, trusted extension buil...
From £10,136
Claytons Building and Roofing are here to help customers who need an Extension Builder in SO31. We offer a competitive rate to complete all your ex...
From £9,968
Trusted and professional extension builder in SO31. Experienced in all extension buildering work and keeping within budget and on quote. Andy's Bui...
From £9,784
NICK SMITH BUILDERS is an established extension buildering business in SO31. We come highly recommended and provide competitive quotes for your wor...
From £10,040
Been in the trade for over 30 yrs and take pride in my work. Fully insured and references both trade and private available
From £9,976
O NEILL CONSTRUCTION LTD is an established extension buildering business in SO31. We come highly recommended and provide competitive quotes for you...
From £9,752
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Garden offices range from the cheapest of £9,752 (Steve Lovett Builders based in SO18) to the dearest of £10,192 (A W PAVING LTD based in SO31), but these are only estimates.
The best way to compare costs is to get actual quotes.
Get rates and quotes to build a garden office in SO31 by posting a job with HaMuch. We'll send it to extension builders in SO31.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Locks Heath | £30 | £213 |
| Garden Office near Hedge End | £30 | £215 |
| Garden Office near Fareham | £31 | £217 |
| Garden Office near Southampton | £30 | £215 |
| Garden Office near Lee-on-the-Solent | £31 | £217 |
| Garden Office near Eastleigh | £30 | £215 |
| Garden Office near Gosport | £30 | £215 |
| Garden Office near Chandler's Ford | £30 | £216 |
| Garden Office near Totton | £30 | £216 |
| Garden Office near Portsmouth | £31 | £216 |
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 - £17,485

Two storey extension - £87,977

Build a timber frame extension - £25,985

Build a swimming pool - £80,985

Single storey extension - £54,696

Side return extension - £41,329

Install an RSJ - £2,185

Outbuilding - £9,985

Build a Mansard loft conversion - £51,985

Loft conversion - £33,608

Build a kitchen extension - £41,985

Hip to gable loft conversion - £41,985

Granny annexe - £86,985

Garden office - £9,985

Convert a Garage - £15,985

Garage - £18,485

Build a flat roof extension - £21,985

Build a dormer loft conversion - £41,985

Concrete foundations - £6,235

Convert a bungalow loft - £28,985

Convert a basement - £37,329