Home Improvement Listings

The listings published through the National Home Improvement Authority index contractors, specialty trades, and service providers operating across the residential improvement sector in the United States. Coverage spans structural, mechanical, electrical, and finish trades, organized by service category and geographic market. The listings function as a structured reference point for property owners, general contractors, and procurement professionals navigating a fragmented service sector where licensing requirements, trade classifications, and inspection obligations vary by jurisdiction.

How listings are organized

Listings are grouped by primary trade discipline, then subdivided by scope of service and licensing tier. The principal classification boundaries follow standard construction trade divisions:

1. General contracting — firms holding a general contractor license capable of managing multi-trade projects, pulling permits, and assuming primary liability for code compliance.
2. Specialty trade contractors — licensed in a single discipline: electrical (governed under the National Electrical Code, NFPA 70), plumbing (International Plumbing Code), HVAC (International Mechanical Code), or structural framing.
3. Finish and remodeling trades — tile, flooring, cabinetry, painting, and related work that typically requires no permit but may require a specialty or home improvement contractor registration depending on the state.
4. Design and assessment services — architects, structural engineers, energy auditors, and home inspectors operating under professional licensure boards separate from contractor licensing bodies.

Geographic filtering is available at the state and metropolitan statistical area (MSA) level, reflecting the reality that licensing reciprocity between states is limited — a contractor holding a California C-10 electrical license, for example, cannot legally perform licensed electrical work in Texas without meeting that state's separate examination and bonding requirements. The Home Improvement Directory Purpose and Scope page details the jurisdictional logic applied to geographic classification.

What each listing covers

Each listing entry identifies the provider by legal business name, primary trade category, and the states in which active licensure has been reported. Where available, listings note:

• License class and issuing authority (e.g., state contractor licensing board)
• Bonding and insurance status category (general liability and workers' compensation are standard thresholds in most state contractor licensing statutes)
• Project scope range — residential only, light commercial, or both
• Permit-pulling authority, which distinguishes licensed contractors from unlicensed handyman operators in jurisdictions that cap unlicensed work at defined dollar thresholds (California, for instance, sets this threshold at $500 under Business and Professions Code §7048)
• Any noted specialty certifications such as EPA RRP (Renovation, Repair, and Painting rule, 40 CFR Part 745) certification for work in pre-1978 housing, or OSHA 10/30 construction safety credentials

Safety classification is relevant in listings for trades that operate under elevated risk categories. Roofing and structural work fall under OSHA's construction standards at 29 CFR Part 1926, with fall protection requirements applying at heights of 6 feet or more (OSHA 29 CFR 1926.502). Electrical work in occupied residences is subject to arc-fault circuit interrupter requirements under NFPA 70, Article 210.12. Listings for trades in these categories reflect those regulatory designations.

How currency is maintained

Listings are subject to periodic review against publicly accessible state licensing board databases. Contractor license status, disciplinary actions, and bond lapses are matters of public record in all 50 states. The primary authoritative databases include individual state contractor licensing boards (such as the California Contractors State License Board, the Florida Department of Business and Professional Regulation, and the Texas Department of Licensing and Regulation), supplemented by OSHA's contractor enforcement records and EPA's RRP certified firm database.

Listings that cannot be verified against a current active license in the relevant state are flagged or removed on a rolling basis. The How to Use This Home Improvement Resource page describes the verification methodology in greater detail.

How to use listings alongside other resources

The listings in this directory function as an initial reference layer, not a credentialing or vetting service. A listing confirms that a provider operates in a named trade category and jurisdiction — it does not substitute for independent license verification through the relevant state board, review of certificate of insurance documentation, or assessment of permit history.

For projects requiring permits — additions, structural alterations, electrical panel upgrades, plumbing rough-in, HVAC system replacement — the applicable authority having jurisdiction (AHJ) is the local building department. The International Building Code (IBC) and International Residential Code (IRC), published by the International Code Council (ICC), are adopted in modified form by 49 states and form the baseline for permit and inspection requirements. Permit scope and inspection stage requirements are set at the local level, not the state level, which means two contractors operating in the same state may face materially different inspection sequences depending on the municipality.

Listings should be read in conjunction with trade-specific reference material covering permitting thresholds, license class distinctions, and safety code applicability. The full scope of how this directory is structured alongside those reference layers is documented at Home Improvement Listings, where category-level breakdowns provide the decision boundaries needed to identify the correct trade classification before initiating contractor engagement.

Cross-referencing listings against building department permit records — available as public documents in most jurisdictions — allows verification of a contractor's active permitting history, which is a more reliable indicator of ongoing licensure compliance than self-reported credentials alone.

References

• 28 CFR Part 35 — Nondiscrimination on the Basis of Disability in State and Local Government Services
• 24 CFR Part 3280 — Manufactured Home Construction and Safety Standards
• 29 CFR Part 1926 — Safety and Health Regulations for Construction
• ADA Standards for Accessible Design — U.S. Department of Justice
• 2010 ADA Standards for Accessible Design — U.S. Department of Justice
• 21 CFR Part 110 — Current Good Manufacturing Practice in Manufacturing, Packing, or Holding Human Fo
• Advisory Council on Historic Preservation — Section 106 of the National Historic Preservation Act
• California Contractors State License Board — License Classifications