NAICS Code 321911 — Wood Window and Door Manufacturing

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 3 national industries under 32191 (Millwork).

Code	321911
Title	Wood Window and Door Manufacturing
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	1,000 employees

Official definition (2022 NAICS)

This U.S. industry comprises establishments primarily engaged in manufacturing window and door units, sash, window and door frames, and doors from wood or wood clad with metal or plastics.

Cross-References.

Is a business under 321911 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 321911 qualifies as a small business if it does not exceed 1,000 employees. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — employee count is averaged over the latest 24 months.

Where 321911 sits in the hierarchy

Level	Code	Title
Sector	31-33	Manufacturing
Subsector	321	Wood Product Manufacturing
Industry Group	3219	Other Wood Product Manufacturing
NAICS Industry	32191	Millwork
National Industry	321911	Wood Window and Door Manufacturing

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
2431	Millwork

Related National Industry codes

• 321912 — Cut Stock, Resawing Lumber, and Planing
• 321918 — Other Millwork (including Flooring)

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.