Two organisations opposing mass house building across the county are to stage a demonstration outside Cornwall Council's offices next Thursday morning (Jan 31).
Trelawney Alliance and Our Cornwall have planned the demonstration to coincide with the strategic planning committee's discussion of the county's future housing needs.
Spokesman Jean Charman said: "Support us on the day by coming to Cornwall Council and confronting councillors as they come in by asking them to support the lowest number.
"We need to make it clear to them that this hyper-growth strategy will have irreversible consequences."
The demonstration is scheduled to start at 9am.