The Longmont City Council unanimously approved a plan on Tuesday for a roughly 26-acre property to go through the city’s annexation review process for possible future development. The land is currently zoned for agriculture in unincorporated Boulder County. The property is northwest of the U.S. 287 and Park Ridge Avenue intersection on the far north side of Longmont’s planning area. The project applicant, NLA Investors LLC, is requesting that the property be zoned “Residential – Mixed Neighborhood,” which would allow attached residential units at densities ranging from six to 18 units per acre. A concept plan attached to the council’s packet of materials indicated that higher-density residential units might be built closer to U.S.