"What is known about open pit mines and real estate values? Actually very little is known that I could find," he told Daybreak Kamloops' Shelley Joyce.
McGuinness began to search online, and found a study by U.S researcher Dianne Hite that looked at the impact of a gravel pit in Delaware County, Ohio in the mid-90s.
Hite found the houses closest to the mine dropped up to 30 per cent in value, and houses three miles away saw a 4.9 per cent reduction.
"When you tell somebody there's going to be a 5 per cent reduction in property value, they kind of shrug their shoulders, but when you say if it's a house that's worth $400,000, that's a $20,000 drop in property value," he said.
"Most people, their nest egg, a large part of it, is their house."
McGuinness wants to see a comprehensive, third party analysis, that would probe further into how the mine would affect housing.
To hear the full interview with Sean McGuinness, click the audio labelled: TRU professor questions impact of Ajax mine.