Town Hall Address 450 West Main St. New Castle, CO 81647 United States- Garfield County Website https://www.newcastlecolorado.org Zoning 970-984-2311 450 West Main St. New Castle, CO 81647 United States Town Clerk 970-984-2311 Ext. 105 450 West Main St. New Castle, CO 81647 United States Water 970-984-2311 450 West Main St. New Castle, CO 81647 United States Sewer 970-984-2311 450 West Main St. New Castle, CO 81647 United States Tax Collector 970-984-2311 Ext. 104 450 West Main St. New Castle, CO 81647 United States Town Hall Hours Monday - Friday: 8:00 AM - 5:00 PM County Garfield