The move will help the Inverness firm build another 500 homes in the Highlands over the next eight to ten years.
The £30 million investment is at:
North Kessock, where Tulloch Homes is planning to build 103 homes
Parks Farm, near Inverness, with scope for 310 homes
Fortrose, in front of Fortrose Academy with 109 homes
Group chairman David Sutherland said Tulloch Homes was also in advanced negotiations for new land acquisition in the Central Belt of Scotland.