Department of the Interior NAICS 238220 contractors in Washington

Plumbing, Heating, and Air-Conditioning Contractors. Use this deeper state-buyer-industry page to see which visible contractors sit closest to this exact overlap in the public AwardRegistry layer.

Washington + Department of the Interior

Last updated: April 3, 2026

Visible recipients

Mapped obligations

$6,812,887

Visible recipients tied to Department of the Interior, Washington, and NAICS 238220

Mckinstry CO LLC

Seattle, WA

Mckinstry CO LLC is a federal category business profile based in Seattle, WA. The current public data layer shows $7,789,591 in visible federal obligations across 5 awards or transactions. General Services Administration appears as the strongest visible awarding agency. Top industry concentration is in NAICS 238220 (Plumbing, Heating, and Air-Conditioning Contractors). The profile also shows meaningful product and service activity in PSC Z2AA.

$6,812,887