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Chris Bond
Havant, PO9
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.
Steve Bannister
We are a small family run business with over 20 years experience in brickwork, bathroom/kitchen fitting, roofing, landscaping, fencing, tiling and ...
Devscapes is an established extension buildering business in Havant. We come highly recommended and provide competitive quotes for your work.
Rob Butler
Havant, PO9
Need to find an Extension Builder near you for all your extension buildering work?
Oakstone Developments provides a local, trusted extensio...
Havant, PO9
Park Building Services Ltd is a trusted extension builder serving customers in Havant and the surrounding area. Contact us to today to get a compet...
Tao Peskett
TP Developments are here to help customers who need an Extension Builder in Havant. We offer a competitive rate to complete all your extension buil...
Experienced extension builder ready to quote for your work. Shepperd Developments is the best extension builder in Havant. No obligation free quote...
Experienced extension builder ready to quote for your work. Portsmouth Building Repairs is the best extension builder in Havant. No obligation free...
JKS Property is an established and experienced local extension builder in Havant. Please contact us for a free, no obligation quote and competitive...
M.K Warner Building Services is an established extension buildering business in Havant. We come highly recommended and provide competitive quotes f...

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 Havant by posting a job with HaMuch. We'll send it to extension builders in Havant.
"Garden office" - PO9, job posted 01/05/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Havant | £35 | £249 |
| Garden Office near Havant & Waterloo | £35 | £248 |
| Garden Office near Waterlooville | £36 | £250 |
| Garden Office near Horndean | £36 | £254 |
| Garden Office near Portsmouth | £36 | £250 |
| Garden Office near Gosport | £35 | £246 |
| Garden Office near Fareham | £35 | £250 |
| Garden Office near Chichester | £34 | £242 |
| Garden Office near Lee-on-the-Solent | £35 | £249 |
| Garden Office near Ryde | £34 | £255 |
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 - £17,587

Two storey extension - £88,131

Build a timber frame extension - £26,087

Build a swimming pool - £81,087

Single storey extension - £56,744

Side return extension - £42,481

Install an RSJ - £2,287

Outbuilding - £10,087

Build a Mansard loft conversion - £52,087

Loft conversion - £34,568

Build a kitchen extension - £42,087

Hip to gable loft conversion - £42,087

Granny annexe - £87,087

Garden office - £10,087

Convert a Garage - £16,087

Garage - £18,587

Build a flat roof extension - £22,087

Build a dormer loft conversion - £42,087

Concrete foundations - £6,337

Convert a bungalow loft - £29,087

Convert a basement - £38,481