Key takeaways
- Define every metric before comparing it.
- Keep source and observation dates together.
- Separate operating evidence from interpretation.
Source record
10 cited sources
Last verified
2026-08-12
Table of Contents
A rental portfolio data dictionary is a short operating reference that defines what each field means, where it comes from, and when it was last checked. It prevents a vacancy, work order, or rent figure from changing meaning between an owner report and a daily queue.
Evidence model
Start with an identifier, observation date, source, definition, value, confidence, and next action. The Census Bureau reported a 5.7% national rental vacancy rate for 2024 in its ACS-64 release; that number is useful context, but it is not a substitute for a property-level status record. Pair the ACS vacancy release with the Census vacancy definitions and the Census API profile variables.
For local operations, define “vacant,” “ready,” “occupied,” “notice,” and “unknown” separately. Record the Housing Vacancy Survey, ACS methodology, HUD housing quality standards, and NIST measurement guidance as reference points, not as replacements for inspection evidence.
Daily use
Use the dictionary before a handoff: identify the field, cite the source, mark the last verified date, and state what would change the value. The rental owner report reliability method and research library provide adjacent review patterns. This method is operational research, not accounting, tax, legal, or fair-housing advice.
Sources and verification notes
The Census housing topic page, Census data tables, BLS CPI databases, and FTC privacy guidance support the source register and data-handling boundaries. Verify local rules and source revisions before acting.