Analysis guide
NAICS 236220 Explained for Federal Contractors
What commercial and institutional building construction covers, how the size standard works, and how to use the code to win.
Every federal contract is classified with a North American Industry Classification System (NAICS) code. For general building contractors, the code that matters most is 236220, Commercial and Institutional Building Construction. It covers construction of commercial and institutional buildings under contract for a third party — offices, schools, hospitals, retail and government buildings — as opposed to heavy civil works or single-trade specialty work.
Why the code controls so much
Your NAICS code is not just a label. It sets the size standard the Small Business Administration uses to decide whether your firm is small for a given procurement. It also determines how spending is reported, which is why NAICS is the backbone of any market analysis. When the government says a market is a certain size, it means the sum of obligations reported under that code.
Where 236220 sits in the market
NAICS 236220 is consistently one of the largest contract markets in the federal government by obligated dollars, and in the most recent complete fiscal year it was the largest of all. That scale is an opportunity and a warning: the biggest single market is also among the most competitive.
Adjacent codes to consider
Not every firm fits neatly into 236220. Engineering services (541330), site preparation (238910), and the specialty trade codes around construction can be easier entry points, and many federal construction projects require them. A firm can — and usually should — register several NAICS codes and choose the best fit per solicitation.
Mistakes to avoid
- Registering a code whose size standard makes you other than small without realising it.
- Using a code that does not match the work described in the solicitation.
- Assuming your code is the only way to reach the work; teaming and subcontracting count too.
The NAICS module of the FCEXperts Pro membership walks through selection and size-standard strategy with worked examples.
Turn this data into wins
The same federal-contracting fundamentals behind this analysis are taught in the FCEXperts Pro Membership. The full federal-contracting training library, templates, and member-only expert briefings.