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Need to find an Extension Builder near you for all your extension buildering work?
Mount Oriel Conversions & Extensions provides a local, t...
Relax... you have found a reliable extension builder in BT8. SM Plumbing & Heating is a friendly and reliable company based in BT8 who consider no ...
From £9,176
Trusted and professional extension builder in BT8. Experienced in all extension buildering work and keeping within budget and on quote. Extended li...

Garden offices range from the cheapest of £9,136 (Mount Oriel Conversions & Extensions based in BT8) to the dearest of £9,488 (AK Building Services based in BT8), 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 BT8 by posting a job with HaMuch. We'll send it to extension builders in BT8.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Carryduff | £23 | £158 |
| Garden Office near Belfast | £23 | £161 |
| Garden Office near Saintfield | £23 | £162 |
| Garden Office near Lisburn | £24 | £164 |
| Garden Office near Comber | £22 | £160 |
| Garden Office near Ballygowan | £24 | £183 |
| Garden Office near Holywood | £23 | £159 |
| Garden Office near Ballynahinch | £19 | £189 |
| Garden Office near Hillsborough and Culcavy | £25 | £170 |
| Garden Office near Greenisland | £23 | £153 |
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 - £16,792

Two storey extension - £86,938

Build a timber frame extension - £25,292

Build a swimming pool - £80,292

Single storey extension - £40,840

Side return extension - £33,535

Install an RSJ - £1,492

Outbuilding - £9,292

Build a Mansard loft conversion - £51,292

Loft conversion - £27,113

Build a kitchen extension - £41,292

Hip to gable loft conversion - £41,292

Granny annexe - £86,292

Garden office - £9,292

Convert a Garage - £15,292

Garage - £17,792

Build a flat roof extension - £21,292

Build a dormer loft conversion - £41,292

Concrete foundations - £5,542

Convert a bungalow loft - £28,292

Convert a basement - £29,535