237990

Other Heavy and Civil Engineering Construction

Construction › Heavy and Civil Engineering Construction › Other Heavy and Civil Engineering Construction

SBA Size Standard

$45M average annual receipts

Revenue-Based Verify at SBA.gov →

NAICS Code Hierarchy

23

Sector

Construction

237

Subsector

Heavy and Civil Engineering Construction

2379

Industry Group

Other Heavy and Civil Engineering Construction

237990

National Industry (This Code)

Other Heavy and Civil Engineering Construction

Official NAICS Description

Source: U.S. Census Bureau 2022 NAICS

📘 Source: U.S. Census Bureau — 2022 NAICS Manual
This industry comprises establishments primarily engaged in heavy and civil engineering construction projects (excluding highway, street, bridge, and distribution line construction). The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to heavy and civil engineering construction projects (excluding highway, street, bridge, distribution line, oil and gas structure, and utilities building and structure construction). Construction projects involving water resources (e.g., dredging and land drainage), development of marine facilities, and projects involving open space improvement (e.g., parks and trails) are included in this industry. Illustrative Examples: Channel construction Land drainage contractors Dam construction Marine construction Dock construction Microtunneling contractors Dredging (e.g., canal, channel, ditch, waterway) Nuclear waste disposal site construction Earth retention system construction Flood control project construction Park ground and recreational open space improvement construction Railroad construction Golf course construction Subway construction Horizontal drilling (e.g., cable, pipeline, sewer installation) Trenching, underwater Hydroelectric generating station construction Tunnel construction

✓ Small Business Eligibility at a Glance

Based on SBA Table of Small Business Size Standards (2024)

Size Standard

$45M average annual receipts

Measurement Period

3-year average

Standard Type

Revenue-Based

Applies To

All contracts under NAICS 237990

Set-Aside Programs

8(a), WOSB, HUBZone, SDVOSB

Certification Required

No (self-certify in SAM.gov)

Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.

Cross-References

The following activities are classified elsewhere in the NAICS system:

Constructing water mains, sewers, and related structures--are classified in Industry 237110, Water and Sewer Line and Related Structures Construction;
Constructing oil and gas pipelines and related structures--are classified in Industry 237120, Oil and Gas Pipeline and Related Structures Construction;
Constructing power and communication transmission lines and related structures--are classified in Industry 237130, Power and Communication Line and Related Structures Construction;
Installing and maintaining electric power lines and towers performed by electric utility companies--are classified in Industry Group 2211, Electric Power Generation, Transmission and Distribution;
Installing and maintaining communication transmission lines and towers performed by telecommunications companies--are classified in Subsector 517, Telecommunications;
Constructing highways, streets, and bridges--are classified in Industry 237310, Highway, Street, and Bridge Construction;
Trenching (except underwater) or removing dams, dikes, and other heavy and civil engineering constructions--are classified in Industry 238910, Site Preparation Contractors; and
Inspecting pipelines (i.e., visual)--are classified in Industry 541990, All Other Professional, Scientific, and Technical Services.

How to Use NAICS 237990 in SAM.gov

NAICS code 237990Other Heavy and Civil Engineering Construction — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Other Heavy and Civil Engineering Construction space will be able to find your business.

If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of $45M average annual receipts, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 237990.

Log in Entity Registration Goods & Services Add NAICS Code Enter 237990 Save

Frequently Asked Questions

What is NAICS code 237990?

NAICS code 237990 is 'Other Heavy and Civil Engineering Construction', classified under the Construction sector (NAICS 23). This industry comprises establishments primarily engaged in heavy and civil engineering construction projects (excluding highway, street, bridge, and distribution line construction). The work perform

What is the SBA small business size standard for NAICS code 237990?

The SBA defines a small business under NAICS code 237990 (Other Heavy and Civil Engineering Construction) as one with $45M average annual receipts. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.

How do I register NAICS code 237990 in SAM.gov?

To register NAICS code 237990 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 237990 (Other Heavy and Civil Engineering Construction) to your NAICS code list. You may designate one code as your Primary NAICS code.

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Related PSC Codes

PSC codes commonly used with this NAICS sector

Source: GSA PSC Manual April 2025

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