From £86,376
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,384
Designco Ltd is an established extension buildering business in BT36. We come highly recommended and provide competitive quotes for your work.
...From £86,296
Ballantine building solutions is an established extension buildering business in BT36. We come highly recommended and provide competitive quotes fo...
From £86,264
Trusted and professional extension builder in BT36. Experienced in all extension buildering work and keeping within budget and on quote. DGA have m...
From £86,368
Relax... you have found a reliable extension builder in BT36. SM Plumbing & Heating is a friendly and reliable company based in BT36 who consider n...
From £86,320
C.H Property Services is a trusted extension builder serving customers in BT36 and the surrounding area. Contact us to today to get a competitive q...
From £86,176
Trusted and professional extension builder in BT36. Experienced in all extension buildering work and keeping within budget and on quote. Extended l...
From £86,208
Need an Extension Builder in BT36? MIRKOW has been helping local clients (20 mile radius) with their extension buildering jobs for many years. Get ...
From £86,352
Need to find an Extension Builder near you for all your extension buildering work?
Firenstack Solutions provides a local, trusted extension...
From £86,280
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Building a granny annexe ranges from £86,176 (Extended living by Gilbert-Ash based in BT12) to £86,384 (Designco Ltd based in BT36), 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 BT36 by posting a job with HaMuch. We will send it to extension builders in BT36 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Greenisland | £20 | £134 |
| Granny Annexe near Ballyclare | £17 | £110 |
| Granny Annexe near Belfast | £20 | £137 |
| Granny Annexe near Holywood | £20 | £138 |
| Granny Annexe near Carrickfergus | £21 | £145 |
| Granny Annexe near Carryduff | £20 | £136 |
| Granny Annexe near Crumlin | £22 | £168 |
| Granny Annexe near Bangor | £20 | £150 |
| Granny Annexe near Bangor | £20 | £150 |
| Granny Annexe near Lisburn | £20 | £139 |
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 - £16,802

Two storey extension - £86,954

Build a timber frame extension - £25,302

Build a swimming pool - £80,302

Single storey extension - £41,048

Side return extension - £33,652

Install an RSJ - £1,502

Outbuilding - £9,302

Build a Mansard loft conversion - £51,302

Loft conversion - £27,210

Build a kitchen extension - £41,302

Hip to gable loft conversion - £41,302

Granny annexe - £86,302

Garden office - £9,302

Convert a Garage - £15,302

Garage - £17,802

Build a flat roof extension - £21,302

Build a dormer loft conversion - £41,302

Concrete foundations - £5,552

Convert a bungalow loft - £28,302

Convert a basement - £29,652