David White
Have worked in building industry for over 30 years contracts from government to private sector.

Building a granny annexe ranges from £85,976 (Anak based in BT40) to £85,976 (Anak based in BT40), 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 BT40 by posting a job with HaMuch. We will send it to extension builders in BT40 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Larne | £15 | £122 |
| Granny Annexe near Carrickfergus | £23 | £158 |
| Granny Annexe near Ballyclare | £20 | £124 |
| Granny Annexe near Greenisland | £23 | £153 |
| Granny Annexe near Holywood | £23 | £159 |
| Granny Annexe near Bangor | £24 | £183 |
| Granny Annexe near Bangor | £24 | £183 |
| Granny Annexe near Belfast | £23 | £161 |
| Granny Annexe near Ballygowan | £24 | £183 |
| Granny Annexe near Comber | £22 | £160 |
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 - £16,476

Two storey extension - £86,464

Build a timber frame extension - £24,976

Build a swimming pool - £79,976

Single storey extension - £34,520

Side return extension - £29,980

Install an RSJ - £1,176

Outbuilding - £8,976

Build a Mansard loft conversion - £50,976

Loft conversion - £24,150

Build a kitchen extension - £40,976

Hip to gable loft conversion - £40,976

Granny annexe - £85,976

Garden office - £8,976

Convert a Garage - £14,976

Garage - £17,476

Build a flat roof extension - £20,976

Build a dormer loft conversion - £40,976

Concrete foundations - £5,226

Convert a bungalow loft - £27,976

Convert a basement - £25,980