Gov. Andrew Cuomo added a sweetener on Thursday to his property-tax plan proposal: Any savings county and municipal governments approve, the state will offer a match.

Cuomo was in Williamsville to boost the property tax plan with Erie County Executive Mark Poloncarz, a Democrat who endorsed the proposal at the event. Cuomo will travel to a fundraiser in the area later in the day.

Cuomo’s plan for controlling property taxes would require county governments to work with municipalities to develop shared services and consolidation plans, which would then be approved by voters in a referendum this November.

Cuomo maintains the proliferation of local governments in New York is one of the principle drivers of property taxes in the state, an assertion fiscal watchdogs have disputed.

Consolidation and sharing services has been a longtime push for the governor, who as attorney general also pursued similar efforts for local governments.

Poloncarz is the latest county executive to endorse the proposal, with county leaders in Broome, Nassau and Suffolk also backing it.

The proposal is similar to a consolidation plan backed by officials in Onondaga County, which is recommending the folding of city and county government into one entity. The proposal has been criticized by Syracuse Mayor Stephanie Miner, a Democratic critic of the governor.