Our Methodology: How We Source and Verify Permit Data
Accuracy is the foundation of PermitRules. Homeowners rely on our data to make decisions about construction projects, and incorrect information can lead to costly fines, project delays, or wasted effort. This page explains how we research, verify, and maintain the building permit data on this site.
Primary Data Sources
All permit data on PermitRules is sourced from official government publications. Our primary sources include:
- City building department websites — official permit requirement pages, fee schedules, and application guides
- Municipal codes and ordinances — the legal text that establishes permit requirements, zoning setbacks, and building standards
- County building division publications — for cities that operate under county-level building departments
- Published permit fee schedules — official documents listing current permit costs by project type
- State building code adoption records — to understand which edition of the International Building Code or International Residential Code each jurisdiction follows
We do not use user-submitted data, forum posts, contractor estimates, or other unverified sources as primary references. When official sources conflict or are ambiguous, we note this in the "Additional Notes" section of the relevant permit page.
Review and Update Process
Our research team reviews permit data on a rolling basis. High-traffic cities (Austin, Houston, Los Angeles, Miami, Chicago) are reviewed quarterly. All other cities are reviewed at least annually. Each permit page displays a "Last verified" date showing when the data was most recently confirmed against official sources. When we identify changes, we update our database and regenerate affected pages immediately.
Disclaimer: Always Verify Locally
Despite our best efforts, building permit requirements change frequently — sometimes with little public notice. City councils can amend codes, adjust fee schedules, or modify zoning rules at any time. PermitRules should be used as a starting point for research, not as a definitive legal reference. Always confirm current requirements directly with your city or county building department before beginning construction.
Reporting Errors
If you find information on PermitRules that appears to be incorrect or outdated, please email us at hello@permitrules.com with the specific page URL, the data you believe is incorrect, and a link to the official source showing the correct information. We investigate every report and update our data within 48 hours when errors are confirmed.
Learn more about our editorial standards on our Editorial Policy page, or read about PermitRules and our mission.