In a nonbinding ballot question, Carver voters last week gave their support to the idea of reducing the town’s Community Preservation Act property surcharge from the current 3 percent to 1 percent. Voters backed the question by a vote of 1,372 in favor to 609 opposed. The state’s CPA law allows towns to add a maximum of 3 percent to property tax bills to preserve open space, fund historic preservation and recreation projects, and build or preserve affordable housing. The question was supported by both selectmen candidates in the town’s recent election, who said reducing the CPA surcharge would cushion an anticipated tax increase to build a new school. Funding the CPA at the 3 percent maximum was more popular at the program’s start when the state matched 100 percent of the local contribution. In recent years, the state match has fallen below 50 percent.