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