2022 NAICS national industry in sector 42 Wholesale Trade
423320 Brick, Stone, and Related Construction Material Merchant Wholesalers
NAICS 423320 is the US industry code for brick, stone, and related construction material merchant wholesalers. It covers establishments primarily engaged in the merchant wholesale distribution of stone, cement, lime, construction sand, and gravel; brick; asphalt and concrete mixtures; and/or concrete, stone, and structural clay products.
- Code
- 423320 (2022 NAICS)
- Title
- Brick, Stone, and Related Construction Material Merchant Wholesalers
- Part of
- Lumber and Other Construction Materials Merchant Wholesalers
- SBA small business limit
- Up to 150 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 establishments primarily engaged in the merchant wholesale distribution of stone, cement, lime, construction sand, and gravel; brick; asphalt and concrete mixtures; and/or concrete, stone, and structural clay products.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Merchant wholesale distribution of refractory brick and other refractory products or industrial sand are classified in Industry 423840, Industrial Supplies Merchant Wholesalers.
- Selling ready-mix concrete are classified in Industry 327320, Ready-Mix Concrete Manufacturing.
- Quarrying, dredging, and/or beneficiating construction sand and gravel are classified in U.S. Industry 212321, Construction Sand and Gravel Mining.
Activities listed under 423320
The Census index assigns these 31 activities to this code. If your business matches one, this is your code.
- Asphalt and concrete mixtures merchant wholesalers
- Bricks (except refractory) merchant wholesalers
- Building blocks (e.g., cinder, concrete) merchant wholesalers
- Building stone merchant wholesalers
- Cement merchant wholesalers
- Ceramic construction materials (except refractory and ceramic roofing tile) merchant wholesalers
- Clay construction materials (except refractory and clay roofing tile) merchant wholesalers
- Coal tar paving materials merchant wholesalers
- Concrete building products merchant wholesalers
- Concrete mixtures merchant wholesalers
- Conduit and pipe, concrete, merchant wholesalers
- Countertops, stone and concrete, merchant wholesalers
- Crushed stone merchant wholesalers
- Culvert pipe, concrete, merchant wholesalers
- Drywall joint compounds merchant wholesalers
- Fireplace linings merchant wholesalers
- Flue pipe and linings merchant wholesalers
- Gravel, construction, merchant wholesalers
- Lime (except agricultural) merchant wholesalers
- Mason's materials merchant wholesalers
- Paving mixtures merchant wholesalers
- Plaster merchant wholesalers
- Sand (except industrial) merchant wholesalers
- Septic tanks, concrete, merchant wholesalers
- Sewer pipe, clay (except refractory), merchant wholesalers
- Slate and slate products merchant wholesalers
- Stone, building or crushed, merchant wholesalers
- Structural clay tile (except refractory and clay roofing tile) merchant wholesalers
- Stucco merchant wholesalers
- Terra cotta merchant wholesalers
- Tile, structural clay (except refractory and clay roofing tile) merchant wholesalers
SBA size standard for 423320
To count as a small business for SBA loans and federal contracts under NAICS 423320, your business (including affiliates) must not exceed 150 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.