Businesses primarily engaged in applying physical laws and principles of engineering in the design, development, and utilization of machines, materials, instruments, structures, processes, and systems.
Businesses primarily engaged in conducting research and experimental development (except nanotechnology and biotechnology research and experimental development) in the physical, engineering, and life sciences, such as…
Matched in the Census NAICS:
Engineering research and development laboratories or services (except nanotechnology research and development)
Photonics research and development services (except nanotechnology research and development)
Agriculture research and development laboratories or services (except biotechnology and nanotechnology research and development)
Businesses primarily engaged in manufacturing fabricated or laminated wood arches, wood roof and floor trusses, and/or other fabricated or laminated wood structural members.
Matched in the Census NAICS:
Arches, glue laminated or pre-engineered wood, manufacturing
Trusses, glue laminated or pre-engineered wood, manufacturing
Structural members, glue laminated or pre-engineered wood, manufacturing
Businesses primarily engaged in heavy and civil engineering construction projects (excluding highway, street, bridge, and distribution line construction).
Businesses primarily engaged in site preparation activities, such as excavating and grading, demolition of buildings and other structures, and septic system installation.
Government establishments primarily engaged in one or more of the following: (1) the administration, regulation, and enforcement of air and water resource programs; (2) the administration and regulation of solid waste…
Businesses primarily engaged in manufacturing nonmetallic mineral products (except pottery, ceramics, and plumbing fixtures; clay building materials and refractories; glass and glass products; cement; ready-mix…
Matched in the Census NAICS:
Manmade and engineered proppants (e.g., resin-coated sand, ceramic materials) manufacturing
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How to use the NAICS code lookup
1Describe what you doUse the words a customer would: “commercial lawn mowing”, not “green services company”.
2Compare the best matchesEach code shows the Census lines that matched and its SBA size limit. Open a code page to read its full definition.
3Pick a primary codeChoose the code for the work that brings in most of your revenue, then list the others in SAM.gov.
Example: a roofing company. “commercial roofing” → 238160 Roofing Contractors, SBA limit $19 million in average annual revenue.
The North American Industry Classification System gives every type of business a six-digit code. Federal agencies put one NAICS code on each solicitation, and SAM.gov registration asks for yours.
Why your NAICS code matters for bids
The code on a solicitation sets the SBA size standard for that bid, so it decides whether you can compete for small-business set-asides.
Questions
How do I find my NAICS code?
Describe your main activity in a few words (what you do, not what you are called), for example “commercial lawn mowing” or “office cleaning”. Open the code pages of the best matches and pick the one whose definition and examples fit what brings in most of your revenue.
Can a business have more than one NAICS code?
Yes. In your SAM.gov registration you can list every NAICS code you work in and mark one as your primary code.
Which NAICS code is used for a government bid?
The one on the solicitation. Federal agencies assign one NAICS code to each solicitation, and the SBA size standard of that code decides whether you count as a small business for that bid.
Is this the official NAICS search?
No. PublicBeam is independent. It searches the official 2022 NAICS files of the U.S. Census Bureau, which also has its own search at census.gov/naics.
Source: U.S. Census Bureau, 2022 NAICS (public domain). PublicBeam is independent and not affiliated with the Census Bureau or any agency. Always check the NAICS code in the official notice before you bid.
NAICS Codes for “engineering services” – NAICS Code Lookup