From £9,784
NICK SMITH BUILDERS is an established extension buildering business in PO15. 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 £10,184
Stubbington Roofing Ltd. is an established extension buildering business in PO15. We come highly recommended and provide competitive quotes for you...
From £10,000
We are experts in cavity wall insulation, cavity wall insulation removal, loft insulation, loft boarding, room in roof insulation, chemical damp pr...
From £9,976
O NEILL CONSTRUCTION LTD is an established extension buildering business in PO15. We come highly recommended and provide competitive quotes for you...
From £10,192
Trusted and professional extension builder in PO15. Experienced in all extension buildering work and keeping within budget and on quote. A W PAVING...
From £9,928
Relax... you have found a reliable extension builder in PO15. MA Builders is a friendly and reliable company based in PO15 who consider no job as t...
From £9,984
Trusted and professional extension builder in PO15. Experienced in all extension buildering work and keeping within budget and on quote. DAVE HARRI...
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 £10,304
Thermic Homes is an energy-saving home improvement company operating out of the south coast of England. Our mission is to create warmer homes for t...

Garden offices range from the cheapest of £9,784 (NICK SMITH BUILDERS based in PO15) to the dearest of £10,304 (Thermic Homes based in PO16), 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 PO15 by posting a job with HaMuch. We'll send it to extension builders in PO15.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Fareham | £35 | £250 |
| Garden Office near Locks Heath | £33 | £240 |
| Garden Office near Lee-on-the-Solent | £35 | £249 |
| Garden Office near Hedge End | £34 | £244 |
| Garden Office near Gosport | £35 | £246 |
| Garden Office near Portsmouth | £36 | £250 |
| Garden Office near Waterlooville | £36 | £250 |
| Garden Office near Southampton | £34 | £243 |
| Garden Office near Horndean | £35 | £253 |
| Garden Office near Eastleigh | £34 | £244 |
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 - £17,531

Two storey extension - £88,047

Build a timber frame extension - £26,031

Build a swimming pool - £81,031

Single storey extension - £55,624

Side return extension - £41,851

Install an RSJ - £2,231

Outbuilding - £10,031

Build a Mansard loft conversion - £52,031

Loft conversion - £34,043

Build a kitchen extension - £42,031

Hip to gable loft conversion - £42,031

Granny annexe - £87,031

Garden office - £10,031

Convert a Garage - £16,031

Garage - £18,531

Build a flat roof extension - £22,031

Build a dormer loft conversion - £42,031

Concrete foundations - £6,281

Convert a bungalow loft - £29,031

Convert a basement - £37,851