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NAICS directory · Specialty Trade Contractors (238)

NAICS 238220 — Plumbing, Heating, and Air-Conditioning Contractors

Mechanical systems — plumbing, piping, HVAC installation and retrofit, controls, and service work on buildings and central plants.

What gets solicited under 238220

  • HVAC replacement and mechanical retrofits
  • Chiller, boiler, and central-plant work
  • Plumbing rough-in, fixtures, and domestic water
  • Building automation and control systems
SBA size standard
$19.0M average annual receipts (13 CFR § 121.201, verified June 2026)
Why the standard matters
Average annual receipts under $19.0M let you compete for 238220 set-asides — including 8(a), HUBZone, SDVOSB, and WOSB solicitations when your firm holds the certification. Primes bidding 238220 work also use that threshold to fill small-business subcontracting goals.
Open in our feed
222 open federal opportunities under 238220 right now — pulled from SAM.gov, updated hourly.

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