NAICS 238170: Siding Contractors
This industry comprises establishments primarily engaged in installing siding of wood, aluminum, vinyl, or other exterior finish material (except brick, stone, stucco, or curtain wall). This industry also includes establishments installing gutters and downspouts. The work performed may include new work, additions, alterations, maintenance, and repairs. Illustrative Examples: Downspout, gutter, and gutter guard installation Fascia and soffit installation Siding (e.g., vinyl, wood, aluminum) installation Cross-References. Establishments primarily engaged in--Show more
NAICS 238170 – Siding Contractors encompasses specialized construction services focused on the installation, repair, and replacement of exterior wall cladding systems, including vinyl, aluminum, fiber cement, wood, and composite siding. This work is critical to building envelope integrity, energy efficiency, and long-term structural protection against weather and environmental degradation.
Industry Spending Overview
Federal obligations, top contractors and agencies, and related industry codes for NAICS 238170.
AI Industry Description
NAICS 238170 – Siding Contractors encompasses specialized construction services focused on the installation, repair, and replacement of exterior wall cladding systems, including vinyl, aluminum, fiber cement, wood, and composite siding. This work is critical to building envelope integrity, energy ef...
NAICS 238170 – Siding Contractors encompasses specialized construction services focused on the installation, repair, and replacement of exterior wall cladding systems, including vinyl, aluminum, fiber cement, wood, and composite siding. This work is critical to building envelope integrity, energy efficiency, and long-term structural protection against weather and environmental degradation. In government contracting, these services support facility modernization, energy resilience initiatives, and maintenance of federal infrastructure such as administrative buildings, laboratories, and housing units. Siding contractors often operate as subcontractors under larger construction or renovation contracts, requiring compliance with federal building codes, sustainability standards like ENERGY STAR, and environmental regulations governing material disposal and lead abatement. The leading contractor in this sector is MAYOINTHEMIX LLC, a small business specializing in precision exterior envelope installations for federal and institutional clients. The competitive landscape is dominated by niche firms with expertise in weather-resistant barriers, flashing integration, and code-compliant fastening systems, with many contractors holding small business or HUBZone certifications to compete for set-aside opportunities. The Department of Energy is the primary federal buyer in this category, primarily driving demand through its facility upgrade programs aimed at improving thermal performance and reducing energy consumption across its national laboratory and site infrastructure. These initiatives often align with broader sustainability mandates and require contractors to demonstrate experience with high-performance building materials and integrated envelope systems. The market for siding contractors in government contracting is characterized by steady, project-based demand tied to facility lifecycle management and retrofit programs. Opportunities are concentrated in regions with aging federal infrastructure and high climate volatility. Contractors with proven experience in energy-efficient cladding systems, seamless integration with insulation and waterproofing layers, and familiarity with federal procurement regulations are best positioned to secure contracts in this specialized segment.
Small Business Size Standard
The SBA threshold that decides who can bid NAICS 238170 work as a small business.
The SBA cap for this NAICS (13 CFR 121.201). A business at or under it can self-certify as small for work in this code, which is what makes it eligible for a small-business set-aside. The cap is set per NAICS, so the same company can be small in one code and not in another.
13 CFR 121.201, effective January 1, 2026. The SBA revises the table roughly once a year.
Top Contractors
Companies with the highest total award value under NAICS 238170, ranked by dollars won.
| Company | Total Awards | Contracts |
|---|---|---|
| BABCOCK SDV, LLC | $4.4M | 1 |
| TRINITY OF UTAH INCORPORATED | $1.5M | 1 |
| CORPORATE VISION, INC. | $165K | 2 |
| KAT CONSTRUCTION LLC | $144K | 2 |
| AARON M SALAZAR | $126K | 2 |
| ATHENS GENERAL CONSTRUCTION LLC | $120K | 1 |
| PROW'ESS CONSTRUCTION CORP. | $101K | 1 |
| FOX SNAP ENTERPRISE LLC | $83K | 1 |
| RIOMAR GROUP VENTURES, INC. | $69K | 1 |
| DEKAN CORPORATION | $64K | 1 |
Top Agencies
Federal agencies directing the most contract spending toward NAICS 238170.
Competition
How many companies historically bid on federal awards in NAICS 238170, from bidder counts reported on USAspending.
Median 3-5 bidders per reported award. · 1,095 reported awards
Median Bidders
3
Per reported award, all-time
Single-Bid Awards
33%
Share of reported awards with one bidder
10+ Bidder Awards
5%
Share of reported awards with 10+ bidders
Reported Awards
1,095
96% of 1,138 total awards
Share of reported awards in each bidder-count bracket per federal fiscal year.
How this code compares up the NAICS hierarchy. Parent cohorts pool every code under their prefix, so they are the steadier baseline when a 6-digit sample is thin.
| Industry Family | Competition | Median Bidders | Single-Bid | Bidder Mix | Reported Awards |
|---|---|---|---|---|---|
238170This Code Siding Contractors | Moderate Competition | 3 | 33% | 1,09596% of 1,138 | |
23817NAICS Industry | Moderate Competition | 3 | 33% | 1,09596% of 1,138 | |
2381Industry Group Foundation, Structure, and Building Exterior Contractors | Moderate Competition | 3 | 36% | 63,76391% of 69,832 | |
238Subsector | Fewer Bidders | 2 | 45% | 453,12790% of 505,706 | |
23Sector Construction | Fewer Bidders | 2 | 40% | 1,132,66189% of 1,275,170 |
Bidder counts reported on past federal awards in this NAICS (USAspending). An open opportunity has no bidders yet, so this is the historical norm for similar work, not a fact about this solicitation. Not all awards report bidder counts, and fewer bidders often means incumbent-held work rather than an easier win. Federal reporting of bidder counts fell from ~96% of awards (FY2016) to ~30% (FY2018 onward); the chart shows shares of reported awards, and washed-out stretches mark years with fewer than 30 of them.
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