Direct Answer
The best septic system installation & replacement contractors in Rochester are verified through New York Department of State (dos.ny.gov). Look for companies with 4.5+ Google stars, 50+ reviews, active NY license, and at least 5 years serving the Rochester area.
Full Explanation
Verify any Rochester contractor at New York Department of State (dos.ny.gov). Request proof of general liability insurance and workers' compensation. Ask for references from recent Rochester projects — local experience matters for understanding permit requirements and area-specific challenges.
Local Factors in Rochester
📍Verify license: New York Department of State (dos.ny.gov)
📍Rochester city permit office issues local permits
📍Check BBB Greater Rochester chapter
📍Require NY state license + local city license if applicable