Hamilton will begin working to give preliminary heritage protection to more than 1,000 downtown addresses under new preservation guidelines approved tonight.

The decision kick-starts the process to add 1,027 downtown addresses to the municipal register, giving them temporary protection if an owner seeks a demolition permit.

A massive new study says 100 of those buildings have "considerable" historical value and should be at the top of the list for formal heritage designation under provincial law.

No changes will be made before the city consults with homeowners and the heritage committee.