NAICS 321911 Quarterly Industry Report
Wood Window and Door Manufacturing
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 321911Sector: 32Updated: Q1 2026
About This Report
This Fair Market Value industry report for NAICS 321911 provides business owners, acquirers, and financial advisors with data-driven valuation insights for the wood window and door manufacturing sector, drawing on data from the U.S. Census Bureau[5] and SBA[9] lending records. Additional data is drawn from Bureau of Labor Statistics[10].. The report aggregates transaction multiples, financial benchmarks, and market trends specific to NAICS 321911 establishments, supporting buy-sell agreements, succession planning, SBA-financed acquisitions, and litigation support engagements.
Industry Snapshot
Key metrics for the wood window and door manufacturing industry.
Industry Definition & Overview
Wood Window and Door Manufacturing (NAICS 321911) encompasses 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. The industry produces products ranging from standard residential replacement windows to custom architectural wood doors and specialty fenestration systems for commercial applications. According to the U.S. Census Bureau[5], approximately 180 active domestic establishments employ over 53,000 workers, generating billions in annual revenue driven by both new construction and the substantial replacement and remodeling market for residential windows and doors.
Energy efficiency standards have become a primary product differentiator, with manufacturers investing in high-performance glazing systems, thermal break technologies, and wood-composite frame constructions that meet increasingly stringent building codes and Department of Energy[6] ENERGY STAR certification requirements. Premium wood windows and doors command price premiums through aesthetic appeal, customization options, and architectural design flexibility that vinyl and aluminum products cannot match. Per Bureau of Labor Statistics[7] data, production employment spans woodworking machine operators, glass cutting and glazing specialists, assembly technicians, and finishing workers applying protective coatings and hardware.
The SBA Office of Advocacy[8] notes that small manufacturers compete through custom product capabilities, regional brand recognition, and specialization in architectural and historic preservation window products that require craftsmanship beyond the scope of large national producers. Distribution occurs through building material dealers, home improvement centers, and direct relationships with builders and remodeling contractors who specify window and door products for construction projects.
What's Included in This Industry
- Valuation multiples benchmarked to wood window and door manufacturers
- Revenue and EBITDA trends for residential and commercial fenestration producers
- SBA lending data and financing terms for NAICS 321911
- Comparable transaction data from recent window and door manufacturer acquisitions
- Industry risk factors including housing cyclicality and material cost volatility
- Workforce composition and labor cost benchmarks for window and door production
- Regional market analysis covering domestic manufacturing centers
- Brand value and distribution channel considerations in fenestration valuations
- Growth projections tied to energy efficiency mandates and replacement demand
- Owner compensation and discretionary earnings benchmarks
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Wood Product Manufacturing | 321 |
| Industry Group | Other Wood Product Manufacturing | 3219 |
| NAICS Industry | Millwork | 32191 |
| National Industry | Wood Window and Door Manufacturing | 321911 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 332321 | Metal Window and Door Manufacturing | Metal window and door manufacturers producing aluminum and steel fenestration products that compete with wood windows and doors in commercial applications |
| 321918 | Other Millwork (including Flooring) | Other millwork manufacturers producing wood trim, molding, and flooring products that complement window and door installations in building construction |
| 321912 | Cut Stock, Resawing Lumber, and Planing | Cut stock and resawing operations providing dimensioned lumber components used in window frame and door stile manufacturing processes |
| 423310 | Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers | Lumber and millwork wholesalers distributing wood windows and doors to building material retailers and construction supply accounts |
| 444110 | Home Centers | Home improvement centers retailing replacement wood windows and doors to homeowners and professional remodeling contractors |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | California | 14.5% | 157 |
| 2 | Texas | 7.9% | 86 |
| 3 | Florida | 5.4% | 59 |
| 4 | Pennsylvania | 4.8% | 52 |
| 5 | Washington | 4.0% | 43 |
| 6 | Wisconsin | 3.9% | 42 |
| 7 | Ohio | 3.4% | 37 |
| 8 | Utah | 3.2% | 35 |
| 9 | Oregon | 3.0% | 33 |
| 10 | Minnesota | 2.9% | 31 |
% Of Establishments
0%
14%
Source: County Business Patterns, U.S. Census Bureau[3]
SBA Lending Summary
264
Total SBA Loans
$183.5M
Total Loan Volume
$695K
Average Loan Size
12 yrs
Average Loan Term
10.61%
Average Interest Rate
2,808
Jobs Supported
Source: SBA 7(a) Program Data, U.S. Small Business Administration — FY 2025[4]
Key Insight: Wood window and door manufacturers seeking SBA financing typically qualify under the SBA size standards[11] for NAICS 321911, which set the threshold at 500 employees for small business classification. The SBA 7(a) loan program[12] provides up to $5 million for business acquisitions, woodworking equipment, and working capital for lumber and glass inventory. Industry CDC/504 loan program[13] offers long-term fixed-rate financing for facility improvements, automated production line installations, and finishing system upgrades. Lenders evaluate customer diversification between new construction and replacement markets, product mix, and brand recognition when underwriting transactions.
Top SBA Lenders
| # | Lender | Loans | Volume | Avg Loan |
|---|---|---|---|---|
| 1 | Pathward National Association | 16 | $40.0M | $2.5M |
| 2 | Enterprise Bank & Trust | 16 | $30.0M | $1.9M |
| 3 | 21st Century Bank | 8 | $24.0M | $3.0M |
| 4 | Legacy Bank | 8 | $11.2M | $1.4M |
| 5 | Customers Bank | 8 | $10.9M | $1.4M |
Frequently Asked Questions
Common questions about this industry.
What is the typical valuation multiple for a wood window or door manufacturer?
Wood window and door manufacturers typically trade at 5x to 8x EBITDA, with established brand recognition, diversified distribution channels, and balanced exposure between new construction and replacement markets driving premium valuations. Manufacturers with ENERGY STAR certified product lines and strong dealer networks can command higher multiples. Per U.S. Census Bureau[5] data, the replacement window market provides revenue stability that supports premium transaction pricing.
What SBA loan options are available for acquiring a window manufacturer?
The SBA 7(a) loan program[12] provides up to $5 million for business acquisitions and equipment purchases, while the CDC/504 program[13] finances facility improvements and production equipment. Lenders review brand strength, customer diversification, product mix between new construction and replacement sales, and warranty obligation exposure during underwriting.
How do energy efficiency standards affect window manufacturing?
The Department of Energy[6] ENERGY STAR program and building code requirements establish thermal performance standards that drive product design and manufacturing processes. Compliance requires investment in high-performance glass, thermal break frame designs, and weatherstripping systems that meet U-factor and solar heat gain coefficient targets specified by regional climate zone requirements.
What equipment is needed for wood window and door manufacturing?
Core equipment includes CNC routers and molders for frame and sash components, glass cutting tables and insulating glass assembly lines, door and window assembly stations, finishing spray systems, and hardware installation equipment. Per SBA[9] lending data, CNC woodworking machinery and insulating glass unit production lines represent the largest capital investments for window manufacturing operations.
What are the main cost drivers for window and door manufacturers?
Wood and composite materials represent 25-35% of production costs, with glass and insulating glass units comprising an additional 15-25% depending on product specifications. Per Bureau of Labor Statistics[7] data, production labor for assembly, finishing, and quality testing represents a major cost category, while hardware components and finishing materials add to per-unit manufacturing expenses.
How does the replacement market differ from new construction?
The replacement and remodeling market provides counter-cyclical revenue stability compared to new construction, as aging housing stock generates ongoing demand for energy-efficient upgrade windows regardless of new housing start volumes. Per U.S. Census Bureau[5] housing data, the substantial inventory of homes over 20 years old creates sustained replacement window demand that typically represents 50-60% of total residential window market volume.
What growth opportunities exist for wood window manufacturers?
Growth opportunities include energy retrofit programs driving replacement window demand, premium architectural wood windows for high-end residential construction, historic preservation window products meeting Secretary of the Interior standards, and commercial wood curtain wall systems for mass timber buildings. Increasing building code energy requirements create ongoing product development opportunities.
What workforce challenges do window manufacturers face?
Key challenges include recruiting CNC machine operators and programmers for precision woodworking equipment, training glass cutting and insulating glass assembly technicians, retaining skilled finishing workers, and competing with other manufacturing sectors for maintenance and quality control staff. Custom and architectural product lines require higher skill levels than standard production runs.
Sources & References
Government datasets and editorial sources used in this report.
- [1]U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages bls.gov
- [2]U.S. Census Bureau, Economic Census census.gov
- [3]U.S. Census Bureau, County Business Patterns census.gov
- [4]U.S. Small Business Administration, SBA 7(a) Loan Program Data data.sba.gov
- [5]U.S. Census Bureau census.gov
- [6]Department of Energy energy.gov
- [7]Bureau of Labor Statistics bls.gov
- [8]SBA Office of Advocacy advocacy.sba.gov
- [9]SBA sba.gov
- [10]Bureau of Labor Statistics bls.gov
- [11]SBA size standards sba.gov
- [12]SBA 7(a) loan program sba.gov
- [13]CDC/504 loan program sba.gov
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