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