NAICS 237990 size standard: Other Heavy and Civil Engineering Construction
Sector 23—Construction › Subsector 237—Heavy and Civil Engineering Construction
$45.0 million
average annual receipts
A business whose primary industry is NAICS 237990 (Other Heavy and Civil Engineering Construction) is small for SBA and federal contracting purposes if its average annual receipts, including affiliates, are no more than $45.0 million.
Check my business →
Exceptions
These activities under 237990 use a different size standard when the contract is for that work:
| Exception | Size standard |
|---|
| Exception: Dredging and Surface Cleanup Activities | $37.0 million in average annual receipts |
NAICS 237990 on AwardWatchdog
Footnotes that apply
Footnote 2. NAICS code 237990—Dredging: To be considered small for purposes of Government procurement, a firm or its similarly situated subcontractors must perform at least 40 percent of the volume dredged with their own equipment or equipment owned by another small dredging concern.
Before you rely on this
- Affiliates count. SBA adds the receipts or employees of your affiliates (companies that control you, that you control, or that share common ownership or management) to yours. See 13 CFR 121.103.
- Receipts are a 5-year average. Average annual receipts are generally your total receipts over your last 5 completed fiscal years divided by 5 (13 CFR 121.104).
- Employees are a 24-month average. Employee-based standards use your average number of employees per pay period over the preceding 24 completed calendar months, counting part-time and temporary staff (13 CFR 121.106).
- The contract decides the code. For a federal contract, the contracting officer assigns one NAICS code in the solicitation, and that code’s size standard is the one that counts.
- Check officially. Use the official SBA Size Standards Tool and keep your SAM.gov registration current.
Not legal or professional advice. This is a free estimate from AwardWatchdog based on SBA’s published table. AwardWatchdog is not affiliated with SBA or the U.S. government. Only SBA can make a formal size determination.
Common questions
What is the SBA size standard for NAICS 237990?
A business whose primary industry is NAICS 237990 (Other Heavy and Civil Engineering Construction) is small for SBA and federal contracting purposes if its average annual receipts, including affiliates, are no more than $45.0 million. The standard comes from SBA’s table at 13 CFR 121.201 (last amended effective March 17, 2023). 1 exception applies to certain work: Dredging and Surface Cleanup Activities: $37.0 million in average annual receipts.
How are average annual receipts calculated?
Generally, total receipts over the most recently completed 5 fiscal years divided by 5, including affiliates (13 CFR 121.104). Firms in business for less than 5 years use a different calculation.
Is this an official size determination?
No. This page is an estimate from AwardWatchdog based on SBA’s published table. Use the official SBA Size Standards Tool at sba.gov and only SBA can make a formal size determination.
Related codes in Heavy and Civil Engineering Construction
237110 Water and Sewer Line and Related Structures Construction ($45.0M) · 237120 Oil and Gas Pipeline and Related Structures Construction ($45.0M) · 237130 Power and Communication Line and Related Structures Construction ($45.0M) · 237210 Land Subdivision ($34.0M) · 237310 Highway, Street, and Bridge Construction ($45.0M)
Source: 13 CFR 121.201 (SBA table of small business size standards, eCFR current as of October 15, 2026; last amended effective March 17, 2023). See also SBA’s table of size standards.
Get set-asides for NAICS 237990 by email
New small-business set-asides for your NAICS codes and states in one short morning email.