From £10,144
Bailey Construction Services are here to help customers who need an Extension Builder in Test Valley. We offer a competitive rate to complete all y...
From £9,752
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
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 £10,192
We are a Design and Build company based in Hampshire. Proud of our roots, we try to be the very best in the way we go about our business. Friendly...
From £10,136
Claytons Building and Roofing are here to help customers who need an Extension Builder in Test Valley. We offer a competitive rate to complete all ...
From £9,960
ROB DINE CONSTRUCTION is an established and experienced local extension builder in Test Valley. Please contact us for a free, no obligation quote a...
From £10,048
Experienced extension builder ready to quote for your work. S & M Builders is the best extension builder in Test Valley. No obligation free quotes ...
From £10,040
Experienced extension builder ready to quote for your work. Grant Construction is the best extension builder in Test Valley. No obligation free quo...
From £9,984
Need an Extension Builder in Test Valley? T & S Construction has been helping local clients (20 mile radius) with their extension buildering jobs f...
From £10,136
Experienced extension builder ready to quote for your work. Artisan Builders is the best extension builder in Test Valley. No obligation free quote...

Garden offices range from the cheapest of £9,752 (Steve Lovett Builders based in SO18) to the dearest of £10,192 (AAConcepts based in SO14), 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 Test Valley by posting a job with HaMuch. We'll send it to extension builders in Test Valley.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Test Valley | £37 | £261 |
| Garden Office near Andover | £40 | £248 |
| Garden Office near Romsey | £32 | £230 |
| Garden Office near Salisbury | £35 | £247 |
| Garden Office near Winchester | £37 | £266 |
| Garden Office near Chandler's Ford | £34 | £245 |
| Garden Office near Eastleigh | £34 | £244 |
| Garden Office near Totton | £34 | £243 |
| Garden Office near Southampton | £34 | £243 |
| Garden Office near New Forest | £32 | £245 |
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 - £17,551

Two storey extension - £88,077

Build a timber frame extension - £26,051

Build a swimming pool - £81,051

Single storey extension - £56,024

Side return extension - £42,076

Install an RSJ - £2,251

Outbuilding - £10,051

Build a Mansard loft conversion - £52,051

Loft conversion - £34,230

Build a kitchen extension - £42,051

Hip to gable loft conversion - £42,051

Granny annexe - £87,051

Garden office - £10,051

Convert a Garage - £16,051

Garage - £18,551

Build a flat roof extension - £22,051

Build a dormer loft conversion - £42,051

Concrete foundations - £6,301

Convert a bungalow loft - £29,051

Convert a basement - £38,076