Business Directory Go back to directory. Builders FirstSource Builders FirstSource Contact: Jon Bass, Manager Work 819 Washington Miles City MT 59301 work Work Phone: (406) 232-2208work Work Email: MILESCITYSALES@BLDR.COMINTERNET Website: Builders FirstSource Biography Miles City location 819 Washington St. HOURS:MON-FRI: 7AM-5PM | SAT: 8AM-5PM | SUN: CLOSED Builders FirstSource is driven by the desire to provide professional class building materials and services to homebuilders and remodelers across the country. NotesBuilders FirstSource strives to be the preferred supplier of structural building materials and services to homebuilders and remodelers across the nation by giving them both personalized attention at the local level and a wide range of resources only offered by a large company. Builders FirstSource’s goal is to provide outstanding products and services to every customer, regardless of size. Lumber & Building Supplies Cabinets & Fireplaces Drywall & Insulation Decking & Doors Windows & Hardware Roofing & Siding Shingles & Siding Builders FirstSource can provide installation for many products we sell. We have close relationships with skilled subcontractors. By combining installation services with high-quality products and project management, we can provide you with a high-quality turn-key product that is on-time and on-budget.