HELP IS GREATLY APPRECIATED!

There is a golf course which is approximately 85 years old. It has recently received a decision from the OMB that the land is suitable for residential use if servicing issues are addressed. The municipality is against any development on/of the golf course and is now seeking to designate the course a heritage site. Could this constitute some type of expropriation without compensation? Does the owner have any type of ability to challenge the municipality, not through the heritage act, but through the expropriations act?
THANKS!