NAICS 423390

Overview

The North American Industry Classification System (NAICS) is the governmentwide standard for classifying business establishments to compile and publish statistics about the U.S. economy. Developed under the Office of Management and Budget, NAICS replaced SIC in 1997, is jointly maintained with Canada and Mexico, and is currently published on the 2022 basis. ¹

NAICS 423390 (Other Construction Material Merchant Wholesalers) is a six-digit U.S. national industry within Industry Group 4233 (Lumber and Other Construction Materials Merchant Wholesalers). It covers merchant wholesalers of construction materials not elsewhere classified in related industries such as 423310, 423320, or 423330, and is used by the Economic Census and other federal statistical programs to tabulate wholesale trade activity. ²

What this NAICS covers

• Merchant wholesale distribution of construction materials not classified under 423310, 423320, or 423330. ²
• Establishments classified in Industry Group 4233 within NAICS Sector 42 (Wholesale Trade). ²
• Excludes wholesale distribution of electrical apparatus, wiring supplies, and related equipment (classified in 423610). ³
• Excludes wholesale distribution of plumbing and heating equipment and supplies (classified in 423720) and hardware wholesaling (classified in 423710). ³
• Excludes retail sales of construction materials, which are classified in NAICS Sector 44–45 (Retail Trade), not Sector 42. ⁷
• Excludes manufacturing of construction materials, which is classified in NAICS Sectors 31–33 (Manufacturing). ⁸

Related NAICS and PSC codes

Type	Code	Descriptor
NAICS	423310	Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers
NAICS	423320	Brick, Stone, and Related Construction Material Merchant Wholesalers
NAICS	423330	Roofing, Siding, and Insulation Material Merchant Wholesalers
PSC	5630	Pipe and Conduit, Nonmetallic
PSC	5670	Building Components, Prefabricated

Federal statistical reporting notes

• The Economic Census publishes summary statistics for NAICS Sector 42 (Wholesale Trade) on the 2022 basis; industry-level data can be filtered on data.census.gov for the wholesale sector. ⁴
• The Annual Wholesale Trade Survey publishes estimates at the 2- through 4-digit NAICS levels; trends for 423390 are reflected within the broader 4-digit category 4233 (Lumber and Other Construction Materials Merchant Wholesalers). ⁵

Frequently asked questions

• What is NAICS 423390?

  • It is a U.S. national industry under Industry Group 4233 for wholesale distributors of construction materials not elsewhere classified among lumber/wood panels, brick/stone, or roofing/siding/insulation wholesalers. It is used by Census programs to compile wholesale trade statistics. ²

• How does 423390 differ from 423310 and 423320?

  • 423310 covers lumber, plywood, millwork, and wood panels; 423320 covers brick, stone, and related materials. 423390 is the residual category for other construction material wholesalers not in those industries. ²

• Which PSC codes often describe products associated with 423390?

  • Common supply codes include 5630 (Pipe and Conduit, Nonmetallic), 5640 (Wallboard, Building Paper, and Thermal Insulation Materials), and 5670 (Building Components, Prefabricated). ⁶

• Where are official federal statistics published for this industry?

  • The Economic Census provides Sector 42 tables; AWTS releases national estimates by 2–4 digit NAICS, so construction-material wholesalers are visible at 4233. ⁵

• What NAICS vintage is current for wholesale trade classifications?

  • Federal economic statistics are published on the 2022 NAICS basis, the latest update to the system developed under OMB to ensure comparability across North America. ¹

Useful resources

• Census 2022 NAICS Sector 42 — Wholesale Trade tables. ⁴
• Census guidance: NAICS codes and structure overview (2022 basis). ¹
• Census Annual Wholesale Trade Survey (AWTS) — 2022 release notes. ⁵
• Product and Service Code (PSC) Manual (April 2025). ⁶

References

1. U.S. Census Bureau. Understanding NAICS (2022 guidance). https://www.census.gov/programs-surveys/economic-census/year/2022/technical-documentation/code-lists/understanding-naics-redirect.html
2. U.S. Census Bureau. Enterprise Statistics Program — Employer Categories and Corresponding Establishment NAICS Industries. https://www.census.gov/programs-surveys/esp/guidance/employer.html
3. U.S. Census Bureau/LEHD. Selected Codebook Value Labels (industry titles for 423610, 423720, 423710). https://lehd.ces.census.gov/data/lehd-snapshot-doc/latest/appendices/value_labels.html
4. U.S. Census Bureau. 2022 NAICS Sector 42 — Wholesale Trade (Economic Census tables). https://www.census.gov/data/tables/2022/econ/economic-census/naics-sector-42.html
5. U.S. Census Bureau. 2022 Annual Wholesale Trade Survey — Press Release CB24-TPS.10. https://www.census.gov/newsroom/press-releases/2024/annual-wholesale-trade-survey.html
6. General Services Administration. Product and Service Code Manual (April 2025), Section D — Product Codes (FSC Group 56). https://www.acquisition.gov/sites/default/files/manual/PSC%20Manual%20April%202025.pdf
7. U.S. Census Bureau. 2022 NAICS Sector 44–45 — Retail Trade (Economic Census tables). https://www.census.gov/data/tables/2022/econ/economic-census/naics-sector-44-45.html
8. U.S. Census Bureau. 2022 NAICS Sector 31–33 — Manufacturing (Economic Census tables). https://www.census.gov/data/tables/2022/econ/economic-census/naics-sector-31-33.html