The Residential Condition Registry
Division of Anomalous Property and Nonstandard Conditions · Office of Applied Studies and Field Research
Maintained by the Division of Anomalous Property and Nonstandard Conditions since 2014, the Registry is a de-identified database of conditions assessed through the APS 280 Field Practicum and through cooperating contractors who submit closure reports voluntarily.
The Registry exists to support instruction in differential diagnosis. Entries record structure age and type, reported condition, instrumentation findings, resolution category, and time to resolution.
| Resolution category | Share |
|---|---|
| Mechanical (HVAC, plumbing, appliance) | 46.3% |
| Structural or envelope | 21.1% |
| Electrical | 11.7% |
| Biological (pest, microbial) | 9.5% |
| Environmental external | 5.8% |
| Occupant-factors referral made | 2.9% |
| Closed, undetermined | 2.7% |
| Total | 100.0% |
Entries in the final category met documentation standards and completed the full exclusion protocol. The Registry does not record findings beyond the categories listed.
Registry data are available to researchers and cooperating contractors under a data use agreement. Requests are reviewed by the Human and Animal Subjects Review Committee.
Page last revised 28 October 2026 · academics/applied-studies/condition-registry · Office of Applied Studies and Field Research