The Neighborhood Preservation Act will help stabilize falling property values, and it won’t cost taxpayers a dime, which is why real estate columnist Ken Harney is endorsing the measure. The legislation, which already has cleared the House with bipartisan support, would allow homeowners the option of leasing their foreclosed homes from their lenders to avoid getting kicked out, thus keeping neighborhoods from accumulating too many empty houses on the block. Under the plan, consumers could sign up to five-year leases, with a possible option to buy back their houses.