2022 NAICS national industry in sector 42 Wholesale Trade
423390 Other Construction Material Merchant Wholesalers
NAICS 423390 is the US industry code for other construction material merchant wholesalers. It covers (1) establishments primarily engaged in the merchant wholesale distribution of manufactured homes (i.e., mobile homes) and/or prefabricated buildings and (2) establishments primarily engaged in the merchant wholesale distribution of construction materials (except lumber, plywood, millwork, wood panels, brick, stone, roofing, siding, electrical and wiring supplies, and insulation materials).
- Code
- 423390 (2022 NAICS)
- Title
- Other Construction Material Merchant Wholesalers
- Part of
- Lumber and Other Construction Materials Merchant Wholesalers
- SBA small business limit
- Up to 100 employees
- Closest UK SIC
- 46630 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
This industry comprises (1) establishments primarily engaged in the merchant wholesale distribution of manufactured homes (i.e., mobile homes) and/or prefabricated buildings and (2) establishments primarily engaged in the merchant wholesale distribution of construction materials (except lumber, plywood, millwork, wood panels, brick, stone, roofing, siding, electrical and wiring supplies, and insulation materials).
Examples Census gives
- Flat glass merchant wholesalers
- Prefabricated buildings (except wood) merchant wholesalers
- Ornamental ironwork merchant wholesalers
- Fencing and fencing accessories (except wood) merchant wholesalers
- Plate glass merchant wholesalers
- Storage bins merchant wholesalers
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Merchant wholesale distribution of products of the primary metals industries are classified in Industry 423510, Metal Service Centers and Other Metal Merchant Wholesalers.
- Merchant wholesale distribution of lumber; plywood; reconstituted wood fiber products; wood fencing; doors, windows, and their frames; wood roofing and wood siding; and other wood or metal millwork are classified in Industry 423310, Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers.
- Merchant wholesale distribution of stone, cement, lime, construction sand and gravel; brick; asphalt and concrete mixtures (except ready-mix concrete); and/or concrete, stone, and structural clay products are classified in Industry 423320, Brick, Stone, and Related Construction Material Merchant Wholesalers.
- Merchant wholesale distribution of nonwood roofing and nonwood siding and insulation materials are classified in Industry 423330, Roofing, Siding, and Insulation Material Merchant Wholesalers.
- Merchant wholesale distribution of electrical supplies and wiring supplies are classified in Industry 423610, Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers.
- Selling ready-mix concrete are classified in Industry 327320, Ready-Mix Concrete Manufacturing.
Activities listed under 423390
The Census index assigns these 29 activities to this code. If your business matches one, this is your code.
- Architectural metalwork merchant wholesalers
- Awnings (except canvas) merchant wholesalers
- Bailey bridges merchant wholesalers
- Bins, storage, merchant wholesalers
- Building materials, fiberglass (except insulation, roofing, siding), merchant wholesalers
- Building paper merchant wholesalers
- Buildings, prefabricated nonwood, merchant wholesalers
- Ceiling tile merchant wholesalers
- Countertops (except wood, wood fiber, stone, concrete) merchant wholesalers
- Culvert pipe, metal and plastics, merchant wholesalers
- Fencing and fencing accessories (except wood) merchant wholesalers
- Fiberglass building materials (except insulation, roofing, siding) merchant wholesalers
- Flat glass merchant wholesalers
- Gate and fence hardware merchant wholesalers
- Glass, block and brick, merchant wholesalers
- Glass, plate, merchant wholesalers
- Gypsum building products merchant wholesalers
- Iron and steel architectural shapes merchant wholesalers
- Manufactured (i.e., mobile) homes merchant wholesalers
- Mastics, construction, merchant wholesalers
- Metal buildings merchant wholesalers
- Ornamental ironwork merchant wholesalers
- Paper, building, merchant wholesalers
- Plate glass merchant wholesalers
- Prefabricated buildings (except wood) merchant wholesalers
- Septic tanks (except concrete) merchant wholesalers
- Silt fence and other fabrics (e.g., for erosion control) merchant wholesalers
- Storage bins merchant wholesalers
- Structural assemblies, prefabricated (except wood), merchant wholesalers
SBA size standard for 423390
To count as a small business for SBA loans and federal contracts under NAICS 423390, your business (including affiliates) must not exceed 100 employees. Check your business.
Source: SBA table of size standards, effective March 17, 2023.
Closest UK SIC 2007 codes
There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 4663), so treat them as a starting point and check the definition.
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.