What is NAICS code 237310?

NAICS 237310 is the industry "Highway, Street, and Bridge Construction" in the North American Industry Classification System, part of the Construction sector (23).

What is the size standard for NAICS 237310?

The SBA sets a small business size standard for each NAICS code, either average annual receipts or number of employees. Check the current value for 237310 in the SBA table of size standards on sba.gov; it changes from time to time.

NAICS Code 237310: Highway, Street, and Bridge Construction

NAICS code 237310 is the industry for highway, street, and bridge construction in the Construction sector. Agencies tag every federal contract with a NAICS code, so this is the code to list in your SAM.gov registration and to search for bids.

Government contracts under NAICS 237310

Federal agencies obligated $6.1B on contracts under NAICS 237310 from FY2024 to FY2026, including $2.3B in FY2026. The biggest buyers were the Department of Defense, the Department of Transportation, the Department of Agriculture. The largest contractors were Kiewit Infrastructure South Co, The Lane Construction Corporation, Kiewit Infrastructure West Co..

See the full breakdown: government road construction contracts, who wins and who buys.

Open government bids for NAICS 237310

The newest open notices from SAM.gov. Bidding needs a free SAM.gov registration.

Repair Taxiway Alpha & Bravo - North Auxiliary Airfield
Dept of Defense · Solicitation · NAICS 237310 · SC · Small Business Set Aside - Total
Posted Oct 30, 2026 · Responses due Dec 2, 2026
AK FLAP ANCHORAGE 2021(1), Far North Bicentennial Park Enhancements
Transportation, Department of · Solicitation · NAICS 237310 · AK · No Set aside used
Posted Oct 30, 2026 · Responses due Dec 1, 2026
ND OMAD 2025(1) Minuteman Missile Access Road
Transportation, Department of · Solicitation · NAICS 237310 · ND · Small Business Set Aside - Total
Posted Oct 30, 2026 · Responses due Dec 2, 2026
WA ERFO NPS OLYM 2022-1(3), OLYMPIC NPS ERFO REPAIRS 2022 Road 107 MP 0.3 TO 0.5 & MP 0.8
Transportation, Department of · Solicitation · NAICS 237310 · WA · No Set aside used
Posted Oct 30, 2026 · Responses due Dec 3, 2026
WA NP OLYM 12(8), Hurricane Ridge Rockfall Mitigation MP 9.4
Transportation, Department of · Solicitation · NAICS 237310 · WA · Small Business Set Aside - Total
Posted Oct 30, 2026 · Responses due Nov 13, 2026

See all 13 open bids under NAICS 237310

Small business size standard for NAICS 237310

To bid on small business set-aside contracts under NAICS 237310, your business must be small under the SBA size standard for this code, measured either by average annual receipts or by number of employees. The values are updated periodically, so check the current SBA table of size standards before you bid.

How to choose the right NAICS code

Pick the 6-digit code that best describes what you sell. List it as your primary code in SAM.gov, and add other codes for related work. Agencies choose one NAICS code for each contract, so check the codes on past awards for the kind of work you do. Search all codes in the NAICS code lookup.

Related guides

Frequently asked questions

What is NAICS code 237310?: NAICS 237310 is the industry "Highway, Street, and Bridge Construction" in the North American Industry Classification System, part of the Construction sector (23).
What is the size standard for NAICS 237310?: The SBA sets a small business size standard for each NAICS code, either average annual receipts or number of employees. Check the current value for 237310 in the SBA table of size standards on sba.gov; it changes from time to time.
Are there government contracts for NAICS 237310?: Yes. Federal agencies obligated $6.1B on contracts under NAICS 237310 from FY2024 to FY2026, and 13 notices are open right now.