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 £10,008
Whites Carpentry & Building prides in delivering an excellent extension buildering service and value for money in PO7 and the surrounding areas. O...
From £11,096
We are a Small Family run business with over 30 years experience in the building trade, Carpentry is my main trade, with NVQ Level 2.
From £10,144
We are a small family run business with over 20 years experience in brickwork, bathroom/kitchen fitting, roofing, landscaping, fencing, tiling and ...
From £10,112
Futureways Design and Build are here to help customers who need an Extension Builder in PO7. We offer a competitive rate to complete all your exten...
From £9,752
Park Building Services Ltd is a trusted extension builder serving customers in PO7 and the surrounding area. Contact us to today to get a competiti...
From £10,376
Giles Dixon is an experienced Project Manager with over 30 years experience, having worked from the ground up starting in 1984 as an apprentice ele...
From £10,128
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,056
K A Griffin General Builder is an established extension buildering business in PO7. We come highly recommended and provide competitive quotes for y...
From £9,768
Trusted and professional extension builder in PO7. Experienced in all extension buildering work and keeping within budget and on quote. Paul Ramsey...

Garden offices range from the cheapest of £9,752 (Park Building Services Ltd based in PO9) to the dearest of £11,096 (R&B Property Improvements based in PO9), 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 PO7 by posting a job with HaMuch. We'll send it to extension builders in PO7.
"Garden office" - PO9, job posted 01/05/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Waterlooville | £36 | £250 |
| Garden Office near Horndean | £35 | £253 |
| Garden Office near Havant | £35 | £249 |
| Garden Office near Havant & Waterloo | £35 | £248 |
| Garden Office near Portsmouth | £36 | £250 |
| Garden Office near Fareham | £35 | £250 |
| Garden Office near Gosport | £35 | £246 |
| Garden Office near Lee-on-the-Solent | £35 | £249 |
| Garden Office near Locks Heath | £33 | £240 |
| Garden Office near Chichester | £34 | £242 |
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 - £17,663

Two storey extension - £88,245

Build a timber frame extension - £26,163

Build a swimming pool - £81,163

Single storey extension - £58,264

Side return extension - £43,336

Install an RSJ - £2,363

Outbuilding - £10,163

Build a Mansard loft conversion - £52,163

Loft conversion - £35,280

Build a kitchen extension - £42,163

Hip to gable loft conversion - £42,163

Granny annexe - £87,163

Garden office - £10,163

Convert a Garage - £16,163

Garage - £18,663

Build a flat roof extension - £22,163

Build a dormer loft conversion - £42,163

Concrete foundations - £6,413

Convert a bungalow loft - £29,163

Convert a basement - £39,336