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Belfast, BT8
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 Belfast. SM Plumbing & Heating is a friendly and reliable company based in Belfast who cons...
From £9,336
Belfast, BT17
Trusted and professional extension builder in Belfast. Experienced in all extension buildering work and keeping within budget and on quote. Belfast...
From £9,296
Ballantine building solutions is an established extension buildering business in Belfast. We come highly recommended and provide competitive quotes...
From £9,176
Belfast, BT12
Trusted and professional extension builder in Belfast. Experienced in all extension buildering work and keeping within budget and on quote. Extende...
From £9,384
Designco Ltd is an established extension buildering business in Belfast. We come highly recommended and provide competitive quotes for your work.
From £9,376
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £9,264
Trusted and professional extension builder in Belfast. Experienced in all extension buildering work and keeping within budget and on quote. DGA hav...
From £9,384
Relax... you have found a reliable extension builder in Belfast. Finch Construction NI is a friendly and reliable company based in Belfast who cons...

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 Belfast by posting a job with HaMuch. We'll send it to extension builders in Belfast.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Belfast | £23 | £161 |
| Garden Office near Carryduff | £23 | £158 |
| Garden Office near Holywood | £23 | £159 |
| Garden Office near Greenisland | £23 | £153 |
| Garden Office near Lisburn | £24 | £164 |
| Garden Office near Comber | £22 | £160 |
| Garden Office near Ballygowan | £24 | £183 |
| Garden Office near Saintfield | £23 | £162 |
| Garden Office near Hillsborough and Culcavy | £25 | £170 |
| Garden Office near Carrickfergus | £23 | £158 |
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 - £16,821

Two storey extension - £86,981

Build a timber frame extension - £25,321

Build a swimming pool - £80,321

Single storey extension - £41,416

Side return extension - £33,859

Install an RSJ - £1,521

Outbuilding - £9,321

Build a Mansard loft conversion - £51,321

Loft conversion - £27,383

Build a kitchen extension - £41,321

Hip to gable loft conversion - £41,321

Granny annexe - £86,321

Garden office - £9,321

Convert a Garage - £15,321

Garage - £17,821

Build a flat roof extension - £21,321

Build a dormer loft conversion - £41,321

Concrete foundations - £5,571

Convert a bungalow loft - £28,321

Convert a basement - £29,859