What are the current 'size standards' for common construction NAICS codes in November 2026?

The SBA size standards for construction NAICS codes are based on average annual receipts, not number of employees. For federal contracts, your firm's receipts are averaged over its latest five complete fiscal years, and this includes the receipts of any affiliates (sba.gov, size standards page).

For the NAICS code 236220 (Commercial and Institutional Building Construction), the size standard is based on average annual receipts. For NAICS code 237310 (Highway, Street, and Bridge Construction), the size standard is also based on average annual receipts. These are found in the SBA size standards table (13 CFR 121.201).

It is important to remember that state and local government procurements, like those for county and school district projects, follow their own state or local procurement codes. These codes may adopt the federal small business size standards, or they may have their own definitions for small business. You will need to check the specific state procurement portal or the county and school district's vendor guides for their applicable rules.