Median Effective Year Built

Source

County assessor records · vintage 2024 · refresh cadence: monthly

Median effective_year_built across town's parcels. Effective accounts for major renovations.

Direction of better

Higher values are better. Used to rank candidate towns/properties; higher score = stronger fit.

Default weight in Livability composite

5% of the Livability composite by default. Users can override this weight in their intake; the displayed score reflects the user's chosen weighting, never a fixed default.

Where the data lives

Tables: parcels, active_listings

Columns: effective_year_built, year_built

Input field: median_effective_year_built

JSON-LD example

Every value emitted by ValiFit (in /api/v1, MCP responses, on-page JSON-LD) carries a propertyID set to this metric_id, so AI clients can resolve it back here in one round-trip.

{
  "@type": "PropertyValue",
  "propertyID": "livability.median_effective_year_built",
  "name": "Median Effective Year Built",
  "value": "example",
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "name": "composite",
      "value": "Livability"
    },
    {
      "@type": "PropertyValue",
      "name": "level",
      "value": "city"
    },
    {
      "@type": "PropertyValue",
      "name": "direction",
      "value": "higher_better"
    },
    {
      "@type": "PropertyValue",
      "name": "source_year",
      "value": "2024"
    },
    {
      "@type": "PropertyValue",
      "name": "fha_safe",
      "value": true
    }
  ],
  "valueReference": {
    "@type": "QuantitativeValue",
    "additionalType": "https://valifit.com/catalog/metric",
    "identifier": "livability.median_effective_year_built",
    "sameAs": "County assessor records"
  },
  "mentions": [
    {
      "@type": "Dataset",
      "@id": "https://valifit.com/sources/county-assessor",
      "identifier": "COUNTY_ASSESSOR",
      "name": "County Assessor + Recorder Data",
      "url": "https://en.wikipedia.org/wiki/Property_tax_in_the_United_States",
      "sameAs": "https://en.wikipedia.org/wiki/Property_tax_in_the_United_States",
      "creator": {
        "@type": "Organization",
        "name": "County tax assessors (3,144 US counties)"
      },
      "temporalCoverage": "continuous",
      "dateModified": "2026-05-11"
    }
  ]
}