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NAICS 238220 and PSC Z1HB contractors in Washington

Plumbing, Heating, and Air-Conditioning Contractors. MAINTENANCE OF GOVERNMENT-OWNED GOVERNMENT-OPERATED (GOGO) R&D FACILITIES. Use this deeper state cross-code page to see which visible contractors sit in the overlap between these two lanes inside Washington.

Washington · NAICS 238220 · PSC Z1HB

Last updated: April 6, 2026

Visible recipients

Mapped obligations

$6,941,283

Buyer overlap

Top recipients

Visible recipients in the Washington overlap of NAICS 238220 and PSC Z1HB

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.

$6,941,283