Authority Industries Multi-Vertical Scope: What Trade Categories Are Included

The Authority Industries directory spans a broad set of licensed and credentialed trade categories across the United States, organizing contractors and service providers by discipline rather than by geography alone. Understanding which verticals fall within this scope matters for both consumers seeking qualified professionals and trade businesses evaluating whether the directory covers their specialty. This page defines the multi-vertical structure, explains how categories are organized, and clarifies where boundaries between trade types are drawn.

Definition and scope

A multi-vertical directory structure groups distinct trade disciplines into separate, internally coherent categories while maintaining a single searchable index. In the Authority Industries framework, a "vertical" corresponds to a licensed or regulated trade domain — meaning a field in which practitioners are typically required to hold state-issued licenses, carry general liability insurance, or meet bonding thresholds set by statute.

The directory's multi-vertical scope currently spans 12 primary trade categories at the national level. These categories reflect the classification conventions used by the U.S. Bureau of Labor Statistics (BLS) Occupational Employment and Wage Statistics (OEWS) program, which segments construction and installation occupations into distinct codes for electrical, plumbing, HVAC, carpentry, roofing, masonry, and related fields (BLS OEWS).

The 12 primary verticals represented in the directory are:

Electrical (residential, commercial, and low-voltage specialties)
Plumbing and pipefitting
HVAC and refrigeration
Roofing and waterproofing
General contracting and construction management
Carpentry and framing
Masonry, concrete, and tile
Painting and surface finishing
Landscaping, irrigation, and hardscaping
Pest control and environmental services
Flooring installation and finishing
Specialty trades (elevators, fire suppression, solar, and others)

The 12th category — specialty trades — functions as a managed overflow vertical for disciplines that carry licensing requirements in at least 20 U.S. states but do not reach the volume threshold to warrant a standalone primary vertical.

How it works

Each vertical within the directory operates under its own set of credentialing criteria, though all verticals share a baseline eligibility floor. The listing eligibility criteria require that any contractor, regardless of vertical, hold a valid license in the state where services are rendered, carry general liability coverage meeting minimum thresholds, and have no unresolved formal complaints on file with a state licensing board.

Within each vertical, listings are further segmented by service scope — residential, commercial, or industrial — and by geographic service area. This segmentation allows the directory to surface a plumbing contractor serving a tri-county residential market separately from an industrial pipefitting firm licensed for pressure-vessel work across 5 states.

The directory's verification standards apply differently across verticals based on regulatory complexity. Electrical and plumbing contractors, for example, face license verification against state board databases, while landscaping contractors in states without mandatory licensing are evaluated against insurance documentation and Better Business Bureau standing.

Trade categories are not static. The directory update frequency policy requires that vertical definitions be reviewed annually against BLS Standard Occupational Classification updates and NAICS revisions published by the U.S. Census Bureau (U.S. Census Bureau NAICS).

Common scenarios

Residential homeowner lookup: A homeowner in Ohio seeking a licensed HVAC technician navigates to the HVAC vertical, applies a state-license filter, and retrieves results that have been cross-checked against the Ohio Construction Industry Licensing Board records. The vertical boundary prevents general contractors who offer HVAC work as a secondary service from appearing in that filtered view unless they hold a standalone HVAC license.

Cross-vertical contractor: A company holds licenses in both plumbing and HVAC — a common combination in states like Texas, where mechanical and plumbing scopes sometimes overlap. That business receives separate listings in both verticals, each displaying only the license credential relevant to that category. This prevents credential misrepresentation by ensuring that a plumbing license is not displayed as evidence of HVAC qualification.

Specialty trade placement: A solar installation company operates in 14 states and holds electrical contractor licenses in 9 of them. Because solar does not yet have a standalone vertical, the company is listed in both the Electrical vertical (in states where an electrical license governs the work) and the Specialty Trades vertical (in states where a dedicated solar contractor license applies). The trades licensing requirements by trade category resource provides the state-by-state breakdown that governs this dual placement.

Decision boundaries

Vertical placement decisions follow a structured hierarchy, resolving ambiguity at 3 levels:

Level 1 — Primary license type: The governing state license determines vertical assignment. A contractor licensed as an electrician is placed in the Electrical vertical even if roofing represents the majority of their revenue.

Level 2 — Scope of work description: Where a license covers multiple scopes (e.g., a general contractor license in California can encompass framing, drywall, and painting), the contractor's stated primary scope — as filed in their business registration — determines vertical.

Level 3 — Volume and regulatory threshold: Disciplines appearing in fewer than 20 U.S. state licensing frameworks are held in the Specialty Trades vertical rather than elevated to standalone status. This threshold is revisited annually.

Multi-vertical vs. single-vertical directories: A single-vertical directory indexes only one trade category (e.g., a roofing-only lead generation platform). A multi-vertical directory like Authority Industries maintains categorical separation while enabling cross-category search. The practical difference is precision: single-vertical platforms optimize for depth within one trade; multi-vertical directories prioritize coverage breadth with enforced category discipline to prevent credential blurring. The national trades directory vs. local contractor search comparison examines how this breadth-depth tradeoff functions in practice.

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