METHODOLOGY AND TRANSPARENCY

How CASADATA builds Puerto Rico real estate data

This methodology explains the public-record provenance, transaction classification, quality controls, and publication rules behind CASADATA market statistics.

Each publication displays its latest included data date, while sitemap lastmod changes only when that page's data or substantive content changes.

Sources and provenance

CASADATA organizes transactions recorded in public deeds and, where a useful match exists, connects them with CRIM cadastre and property-tax context. Document references appear only when the source record makes them available.

The linked government services remain authoritative for ownership, liens, taxes, documents, and other legal or official matters.

Normalization and classification

  • Sale dates are normalized in UTC; dates before 1900 or later than the day after generation are discarded.
  • Prices used in public statistics must fall between $1,000 and $20,000,000.
  • Public counts and medians use transactions classified as sales. Refinancings and repossessions are excluded from those calculations and may appear separately as research signals.
  • Missing values are not invented: size, parties, documents, CRIM context, and other fields are described as available only when supplied by the source.

Thresholds and unstable-result suppression

The public median-price series uses homes with 500 to 1,400 square feet of structure and requires at least 30 eligible sales per period.

A municipality median is suppressed when one repeated exact price exceeds 30% of the sample, protecting against multi-unit deeds recorded as several rows at the total deed price.

Registry lag and preliminary months

Deeds reach the registry with a lag. CASADATA builds a baseline from the median monthly count across the 24 months ending six months before the data anchor.

Walking backward from the latest month, a month remains preliminary while its count is below 70% of that baseline. The contiguous window is capped at six months so a real market decline is not hidden.

Comparisons, averages, and summaries exclude preliminary months until they mature.

Coverage, updates, and corrections

Published statistics cover Puerto Rico from January 2000, with median series from 2018, subject to the stated thresholds. Municipality publications cover all 78 municipalities.

Snapshots are regenerated during the publication workflow. If a build cannot access a refreshed source, it keeps the last validated snapshot rather than inventing new figures.

To request a correction, provide the page URL, period, and a verifiable description of the issue.

Important limitations

CASADATA does not replace a formal appraisal, title study, survey, zoning certification, flood determination, tax advice, or legal advice.

Official and legal matters must be confirmed with the responsible agency or a qualified professional.

Frequently asked questions

Is CASADATA the Puerto Rico Property Registry or CRIM?

No. CASADATA organizes data for research. The Registry, CRIM, and qualified professionals remain the sources for official confirmation.

Why can a published figure change?

Recent months are preliminary because new deeds continue to arrive. CASADATA updates those periods when it regenerates the validated snapshot.

What happens when a sample is small or distorted?

The median is suppressed when there are fewer than 30 eligible sales or when a multi-unit deed dominates the sample.