T.I Building is a trusted extension builder serving customers in BT29 and the surrounding area. Contact us to today to get a competitive quote for ...
Power Construction is an established and experienced local extension builder in BT29. Please contact us for a free, no obligation quote and competi...
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 BT29. SM Plumbing & Heating is a friendly and reliable company based in BT29 who consider n...
Been in business as 18 years alway put clients first and never had any combacks
Trusted and professional extension builder in BT29. 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 BT29. We come highly recommended and provide competitive quotes fo...
Relax... you have found a reliable extension builder in BT29. Finch Construction NI is a friendly and reliable company based in BT29 who consider n...

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 BT29 by posting a job with HaMuch. We will send it to extension builders in BT29 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Crumlin | £26 | £194 |
| Granny Annexe near Maghaberry | £31 | £205 |
| Granny Annexe near Lisburn | £24 | £164 |
| Granny Annexe near Hillsborough and Culcavy | £25 | £170 |
| Granny Annexe near Belfast | £23 | £161 |
| Granny Annexe near Ballyclare | £20 | £124 |
| Granny Annexe near Carryduff | £23 | £158 |
| Granny Annexe near Waringstown | £23 | £167 |
| Granny Annexe near Greenisland | £23 | £153 |
| 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 - £16,962

Two storey extension - £87,194

Build a timber frame extension - £25,462

Build a swimming pool - £80,462

Single storey extension - £44,248

Side return extension - £35,452

Install an RSJ - £1,662

Outbuilding - £9,462

Build a Mansard loft conversion - £51,462

Loft conversion - £28,710

Build a kitchen extension - £41,462

Hip to gable loft conversion - £41,462

Granny annexe - £86,462

Garden office - £9,462

Convert a Garage - £15,462

Garage - £17,962

Build a flat roof extension - £21,462

Build a dormer loft conversion - £41,462

Concrete foundations - £5,712

Convert a bungalow loft - £28,462

Convert a basement - £31,452