T.I Building is a trusted extension builder serving customers in BT27 and the surrounding area. Contact us to today to get a competitive quote for ...
N W Doyle & Son is a trusted extension builder serving customers in BT27 and the surrounding area. Contact us to today to get a competitive quote f...
Power Construction is an established and experienced local extension builder in BT27. Please contact us for a free, no obligation quote and competi...
With extensive extension buildering experience, we provide reliable, high-quality workmanship at competitive prices. G K Contracts Building & Joine...
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 BT27. SM Plumbing & Heating is a friendly and reliable company based in BT27 who consider n...
Trusted and professional extension builder in BT27. Experienced in all extension buildering work and keeping within budget and on quote. Belfast Lo...
Ballantine building solutions is an established extension buildering business in BT27. We come highly recommended and provide competitive quotes fo...

Building a granny annexe ranges from £86,136 (Mount Oriel Conversions & Extensions based in BT8) to £87,560 (Build a Boiler based in BT67), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in BT27 by posting a job with HaMuch. We will send it to extension builders in BT27 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Lisburn | £24 | £164 |
| Granny Annexe near Hillsborough and Culcavy | £25 | £170 |
| Granny Annexe near Carryduff | £23 | £158 |
| Granny Annexe near Maghaberry | £31 | £205 |
| Granny Annexe near Belfast | £23 | £161 |
| Granny Annexe near Saintfield | £23 | £162 |
| Granny Annexe near Ballynahinch | £19 | £189 |
| Granny Annexe near Crumlin | £26 | £194 |
| Granny Annexe near Comber | £22 | £160 |
| Granny Annexe near Holywood | £23 | £159 |
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 - £17,010

Two storey extension - £87,264

Build a timber frame extension - £25,510

Build a swimming pool - £80,510

Single storey extension - £45,192

Side return extension - £35,983

Install an RSJ - £1,710

Outbuilding - £9,510

Build a Mansard loft conversion - £51,510

Loft conversion - £29,153

Build a kitchen extension - £41,510

Hip to gable loft conversion - £41,510

Granny annexe - £86,510

Garden office - £9,510

Convert a Garage - £15,510

Garage - £18,010

Build a flat roof extension - £21,510

Build a dormer loft conversion - £41,510

Concrete foundations - £5,760

Convert a bungalow loft - £28,510

Convert a basement - £31,983