Steve Bannister
We are a small family run business with over 20 years experience in brickwork, bathroom/kitchen fitting, roofing, landscaping, fencing, tiling and ...
O NEILL CONSTRUCTION LTD is an established extension buildering business in PO16. We come highly recommended and provide competitive quotes for you...
Peter Fenn Property is a trusted extension builder serving customers in PO16 and the surrounding area. Contact us to today to get a competitive quo...
M.K Warner Building Services is an established extension buildering business in PO16. We come highly recommended and provide competitive quotes for...
Steve Harris
Hi my name is Steve harris of hb builders we are based in portchester and have over 40 years of experience in the building trade we would be mor...
Nick Smith
NICK SMITH BUILDERS is an established extension buildering business in PO16. We come highly recommended and provide competitive quotes for your wor...
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...
Relax... you have found a reliable extension builder in PO16. MA Builders is a friendly and reliable company based in PO16 who consider no job as t...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need an Extension Builder in PO16? GRL Building Services Ltd has been helping local clients (20 mile radius) with their extension buildering jobs f...

Garden offices range from the cheapest of £9,736 (H B Builders based in PO16) 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 PO16 by posting a job with HaMuch. We'll send it to extension builders in PO16.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Fareham | £35 | £250 |
| Garden Office near Gosport | £35 | £246 |
| Garden Office near Portsmouth | £36 | £250 |
| Garden Office near Lee-on-the-Solent | £35 | £249 |
| Garden Office near Locks Heath | £33 | £240 |
| Garden Office near Waterlooville | £36 | £250 |
| Garden Office near Horndean | £36 | £254 |
| Garden Office near Havant & Waterloo | £35 | £248 |
| Garden Office near Havant | £35 | £249 |
| Garden Office near Hedge End | £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 - £17,454

Two storey extension - £87,930

Build a timber frame extension - £25,954

Build a swimming pool - £80,954

Single storey extension - £54,072

Side return extension - £40,978

Install an RSJ - £2,154

Outbuilding - £9,954

Build a Mansard loft conversion - £51,954

Loft conversion - £33,315

Build a kitchen extension - £41,954

Hip to gable loft conversion - £41,954

Granny annexe - £86,954

Garden office - £9,954

Convert a Garage - £15,954

Garage - £18,454

Build a flat roof extension - £21,954

Build a dormer loft conversion - £41,954

Concrete foundations - £6,204

Convert a bungalow loft - £28,954

Convert a basement - £36,978