NAICS directory
Construction NAICS codes, with live federal bid counts.
The codes federal construction work is solicited under — official titles, SBA small-business size standards (13 CFR § 121.201, verified June 2026), and how many opportunities are open under each code in the JobsiteBids feed right now.
Specialty Trade Contractors (238)
238210Electrical Contractors and Other Wiring Installation Contractors$19.0M average annual receipts96 open now
Heavy and Civil Engineering Construction (237)
237110Water and Sewer Line and Related Structures Construction$45.0M average annual receipts63 open now
237120Oil and Gas Pipeline and Related Structures Construction$45.0M average annual receipts6 open now
237130Power and Communication Line and Related Structures Construction$45.0M average annual receipts31 open now
Construction of Buildings (236)
Counts reflect open opportunities in the JobsiteBids feed (federal construction & specialty-trade codes from SAM.gov) and update hourly. Prefer browsing by trade? Bids by trade →
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