NAICS 42331: Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers
NAICS industry
Code facts
- Part of
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42
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423
- 4233
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423
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42
- Codes under it
- 1
- Contract awards
- 735 In the last 12 months
- Contract obligations
- $61,953,836 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $23,818,411 |
| FY2025 | $61,953,836 |
| FY2024 | $25,357,798 |
| FY2023 | $55,292,622 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | TW Metals, Inc. | $15,647,821 | |
| 2 | I-Solutions Direct, Inc. | $7,178,334 | |
| 3 | Al Muamroon Trading | $464,906 | |
| 4 | SPI LLC | $146,693 | |
| 5 | Hong Ye Rental & Construction, LTD. | $133,727 | |
| 6 | Specialty Distribution Group, LLC | $115,517 | |
| 7 | Aiken-Ford Lumber CO. | $93,853 | |
| 8 | We Build LLC | $38,903 | |
| 9 | G.e. Frisco Company, Inc. | $34,944 | |
| 10 | J. Wright Building Center, Inc. | $19,285 |
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Defense Logistics Agency | $22,829,523 | |
| 2 | Air Force | $464,906 | |
| 3 | Department of Homeland Security | $285,768 | |
| 4 | Department of Justice | $262,210 | |
| 5 | Smithsonian Institution | $34,944 | |
| 6 | Department of State | $25,649 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 5450 Miscellaneous Prefabricated Structures | $22,839,346 | |
| 2 | 5680 Miscellaneous Construction Materials | $394,841 | |
| 3 | 5510 Lumber and Related Basic Wood Materials | $346,293 | |
| 4 | 5530 Plywood and Veneer | $152,041 | |
| 5 | 5610 Mineral Construction Materials, Bulk | $70,065 | |
| 6 | 5675 Nonwood Construction Lumber and Related Materials | $13,367 | |
| 7 | 5520 Millwork | $2,459 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Illinois | $15,493,896 | |
| 2 | Pennsylvania | $6,821,445 | |
| 3 | Louisiana | $223,704 | |
| 4 | Missouri | $152,041 | |
| 5 | Northern Mariana Islands | $133,727 | |
| 6 | Florida | $38,506 | |
| 7 | Maryland | $37,403 |
Shares are of everything obligated under NAICS 42331 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
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Latest 50 of 380 listed here. See the rest on GovTribe.
Codes under 42331
| NAICS code | Size standard |
|---|---|
| 423310 Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers | 150 employees |
Definition
This industry comprises establishments primarily engaged in the merchant wholesale distribution of lumber; plywood; reconstituted wood fiber products; wood fencing; doors and windows and their frames (all materials); wood roofing and siding; and/or other wood or metal millwork.
Illustrative examples
- Building board (e.g., fiber, flake, particle) merchant wholesalers
- Buildings, prefabricated wood, merchant wholesalers
- Cabinets, kitchen, built in, merchant wholesalers
- Doors and door frames merchant wholesalers
- Fencing, wood, merchant wholesalers
- Fiberboard merchant wholesalers
- Flooring, wood, merchant wholesalers
- Kitchen cabinets, built in, merchant wholesalers
- Lumber (e.g., dressed, finished, rough) merchant wholesalers
- Millwork merchant wholesalers
- Molding (e.g., sheet metal, wood) merchant wholesalers
- Paneling merchant wholesalers
- Particleboard merchant wholesalers
- Plywood merchant wholesalers
- Prefabricated buildings, wood, merchant wholesalers
- Roofing materials, wood, merchant wholesalers
- Screens, window and door, merchant wholesalers
- Shingles, wood, merchant wholesalers
- Siding, wood, merchant wholesalers
- Structural assemblies, prefabricated wood, merchant wholesalers
- Wallboard merchant wholesalers
- Windows and window frames merchant wholesalers
- Wood fencing merchant wholesalers
- Wood flooring merchant wholesalers
- Wood shingles merchant wholesalers
- Wood siding merchant wholesalers
Show all 26
Quick answers
What is NAICS 42331?
NAICS 42331 is Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers, a NAICS industry in NAICS 42, Wholesale Trade.
What is the NAICS code for plywood merchant wholesalers?
The NAICS code for plywood merchant wholesalers is 423310, Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers. Its SBA small business size standard is 150 employees.
What is the NAICS code for millwork merchant wholesalers?
The NAICS code for millwork merchant wholesalers is 423310, Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers. Its SBA small business size standard is 150 employees.
What is the NAICS code for paneling merchant wholesalers?
The NAICS code for paneling merchant wholesalers is 423310, Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers. Its SBA small business size standard is 150 employees.
What codes are under NAICS 42331?
NAICS 42331 has one code under it with its own GovTribe page, 423310 Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers.
How much do federal agencies spend under NAICS 42331?
Federal contracts under NAICS 42331 obligated $61,953,836 in fiscal year 2025 and $166,422,667 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 42331?
The contractors with the most obligated under NAICS 42331 in fiscal years 2026 and 2027 are TW Metals, Inc. ($15,647,821); I-Solutions Direct, Inc. ($7,178,334); and Al Muamroon Trading ($464,906).
Which agencies buy the most under NAICS 42331?
The agencies that obligated the most under NAICS 42331 in fiscal years 2026 and 2027 are Defense Logistics Agency ($22,829,523), Air Force ($464,906) and Department of Homeland Security ($285,768).
Which PSC codes are used with NAICS 42331?
The PSC codes with the most obligated under NAICS 42331 in fiscal years 2026 and 2027 are 5450 Miscellaneous Prefabricated Structures, 5680 Miscellaneous Construction Materials and 5510 Lumber and Related Basic Wood Materials.
Where is the work under NAICS 42331 performed?
By place of performance, the states with the most contract obligations under NAICS 42331 over the last 12 months are Illinois ($15,493,896), Pennsylvania ($6,821,445) and Louisiana ($223,704).
What is the latest contract opportunity under NAICS 42331?
The latest contract opportunity under NAICS 42331 is Lumber for Temporary Roofing Mission - DR4931-MP, solicitation from FEMA Region 9, posted September 23, 2026.
On GovTribe
See everything under NAICS 42331
- Federal contract opportunities, awards and IDVs under this code
- Funding analysis by contractor, agency and set-aside
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