About
Williams Plumbing & Heating, Inc. is Montana's largest mechanical, electrical, and plumbing contractor, founded in 1979 by Ken Williams and headquartered in Belgrade. The company serves the Gallatin Valley and beyond through offices in Bozeman, Big Sky, Billings, Great Falls, Helena, and Williston, with over 350 employees. Williams specializes in plumbing, radiant heating and cooling, HVAC, civil construction, and geothermal system installation — their own Belgrade facility is powered by a geothermal system drawing heat from 300 feet below the surface. As a WaterFurnace dealer, Williams installs ground source heat pump systems for residential and commercial applications throughout Montana and surrounding states. The company provides a comprehensive line of quality services emphasizing relationship-building and long-term performance. Contact Williams Plumbing & Heating at (406) 587-0969. Verified active operator per https://willplumb.com/ + https://members.bozemanchamber.com/list/member/williams-plumbing-heating-inc-4240 (Bundle 5 audit 2026-05-29)
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Williams Plumbing & Heating Inc — Belgrade, Montana
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