Key takeaways
- NAICS 238220 covers installing and servicing plumbing, heating, ventilation and air-conditioning systems.
- The SBA size standard is $19.0M in average annual receipts. An August 2026 SBA proposal would change it to Employee-based; that proposal is not in effect.
NAICS 238220 at a glance
| Fact | 238220 |
|---|---|
| NAICS code | 238220 |
| Title | Plumbing, Heating and Air-Conditioning Contractors |
| SBA size standard | $19.0M receipts |
| Proposed standard (Aug. 2026) | Employee-based (not in effect) |
Sources: U.S. Census Bureau NAICS manual; SBA Table of Small Business Size Standards, 13 CFR 121.201. Confirm any size determination with the SBA size tool.
What NAICS 238220 covers
This industry comprises businesses primarily engaged in installing and servicing plumbing, heating, ventilation and air-conditioning systems.
Related codes: 238210 Electrical Contractors and Other Wiring Installation Contractors.
Size standard for 238220
A company qualifies as small under NAICS 238220 if its average annual receipts are $19.0M or less, counting affiliates.
In August 2026, the SBA proposed new size standards that would set this code at Employee-based. The proposal is not in effect. See our SBA size standards guide.
How to win contracts in 238220
- List the code in SAM.gov. Add 238220 to your registration if it describes work you do, and choose a primary code for your main business; see our SAM registration guide.
- Search by code. Filter SAM.gov contract opportunities and agency procurement forecasts by 238220 to find recurring buyers.
- Study past awards. Look at which agencies, contract vehicles and incumbents dominate the code before you pursue it.
- Target the right agencies. Our federal agency guides cover budgets, buying components and forecasts for 23 agencies.
- Look beyond federal. States, cities, counties and school districts buy the same services; see our state government guides.
How KSG helps
Kensington Sales Group's SDRs book meetings with public agencies across Federal, SLED, K-12 & Higher Ed, Healthcare, Tribal, Special Districts and Utilities. We find the program offices and buyers that spend in NAICS 238220 and get you in front of them before solicitations drop. See how our federal sales development works.