What is NAICS code 237990?

NAICS 237990 is the industry "Other Heavy and Civil Engineering Construction" in the North American Industry Classification System, part of the Construction sector (23).

What is the size standard for NAICS 237990?

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 237990 in the SBA table of size standards on sba.gov; it changes from time to time.

NAICS Code 237990: Other Heavy and Civil Engineering Construction

NAICS code 237990 is the industry for other heavy and civil engineering 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 237990

Federal agencies obligated $32.2B on contracts under NAICS 237990 from FY2024 to FY2026, including $11.6B in FY2026. The biggest buyers were the Department of Defense, the Department of the Interior, the Department of Veterans Affairs. The largest contractors were Dragados/Hawaiian Dredging/Orion JV, Thalle Construction Co Inc, Barnard Construction Company, Incorporated.

See the full breakdown: government other heavy and civil engineering construction contracts, who wins and who buys.

Open government bids for NAICS 237990

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

Y1JZ--926CM3010 Cemetery Expansion and FCA Improvements Project Washington Crossing National Cemetery
Veterans Affairs, Department of · Sources Sought · NAICS 237990 · Service-Disabled Veteran-Owned Small Business (SDVOSB) Set-Aside (FAR 19.14)
Posted Oct 30, 2026 · Responses due Nov 9, 2026
Repair Aids to Navigation (ATON) - Southern Area of USCG District Northeast
Homeland Security, Department of · Presolicitation · NAICS 237990 · CT · Small Business Set Aside - Total
Posted Oct 30, 2026 · Responses due Dec 8, 2026
FWS - Pixley NWR Water Recirculation Design-Build
Interior, Department of the · Combined Synopsis/Solicitation · NAICS 237990 · Small Business Set Aside - Total
Posted Oct 30, 2026 · Responses due Nov 30, 2026
W912EE27BA002 - Lease of One Cutterhead, Hydraulic Pipeline Dredge (Not Less Than 24-Inch Diameter) Fully Operated with Attendant Plant and Personnel, and with a Draft not to Exceed 9 Feet, for Construction and Maintenance Dredging - JBJ Waterway
Dept of Defense · Presolicitation · NAICS 237990 · MS · No Set aside used
Posted Oct 30, 2026 · Responses due Nov 16, 2026
W912EE27BA001 - Lease of One Cutterhead, Hydraulic Pipeline Dredge (Not Less Than 18-Inch Diameter) Fully Operated with Attendant Plant and Personnel, and with a Draft not to Exceed 9 Feet, for Construction and Maintenance Dredging - MS River Harbors
Dept of Defense · Presolicitation · NAICS 237990 · MS
Posted Oct 30, 2026 · Responses due Nov 16, 2026

See all 8 open bids under NAICS 237990

Small business size standard for NAICS 237990

To bid on small business set-aside contracts under NAICS 237990, 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 237990?: NAICS 237990 is the industry "Other Heavy and Civil Engineering Construction" in the North American Industry Classification System, part of the Construction sector (23).
What is the size standard for NAICS 237990?: 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 237990 in the SBA table of size standards on sba.gov; it changes from time to time.
Are there government contracts for NAICS 237990?: Yes. Federal agencies obligated $32.2B on contracts under NAICS 237990 from FY2024 to FY2026, and 8 notices are open right now.