Information services
Official publications, organized for research.
Find permit documents, inspect reviewed information and download records with their sources. Our collection program covers the United States; the coverage directory shows what is actually available.
Document library
For researchers, contractors and designers. Search captured official PDFs and web publications by region and format, compare source coverage and inspect saved versions.
Browse documents →Reviewed information
Filter reviewed statements by state, project and information type, with original evidence and explicit uncertainty.
Search reviewed information →Permit activity data
Explore available permit activity and county housing authorizations with source dates and downloadable data. Statistical coverage is separate from rule coverage.
Explore datasets →Source updates
Inspect collection status and published updates. Changed source files retain their versions and require fresh review before new conclusions are published.
View updates →Choose the right evidence for your question
| Question | Start here | What to check |
|---|---|---|
| What has the authority published? | Document library and original source links | Issuing authority, document scope, version and collection date |
| Which requirements have been reviewed? | Reviewed information, filtered by scope | Conditions, exceptions, evidence location and review date; missing records are not exemptions |
| How does permit activity vary? | Available statistical datasets | Geography, reporting period and metric definition; counts do not establish rules for a property |
| Can our organization integrate the data? | API introduction and contact | Public API access is not currently open; discuss coverage and intended use with us |
Inspect coverage before you rely on a result.
Planned regions, captured documents and reviewed fields are counted separately. Every source has its own scope and may require confirmation with the issuing authority.
Inspect coverage →Data access and coverage requests
Tell us which geography, document type or data format you need. We use requests to prioritize the information product.
API introduction →