Parking permits for the West Concord MBTA commuter parking lot are available to Concord residents whose vehicles are registered in town. Permits are sold in the treasurer's office in the Town House at 22 Monument Square during normal business hours. The permits run from Oct. 1 through March 31 and cost $75. The permit enables Concord residents to park all day in the unnumbered spaces in the lot. Each permit is valid for one or two cars.