Historic District Density

Source

National Register of Historic Places (NPS) · vintage 2025 · refresh cadence: annual

NRHP-listed sites within 1mi of town centroid. Indicator of preservation overlay restrictions / character.

Direction of better

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

Unit

Values are reported in count.

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: historic_properties, national_historic_places

Columns: register_status

Input field: historic_density

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.historic_district_density",
  "name": "Historic District Density",
  "value": 8,
  "unitText": "count",
  "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": "2025"
    },
    {
      "@type": "PropertyValue",
      "name": "fha_safe",
      "value": true
    }
  ],
  "valueReference": {
    "@type": "QuantitativeValue",
    "additionalType": "https://valifit.com/catalog/metric",
    "identifier": "livability.historic_district_density",
    "sameAs": "National Register of Historic Places (NPS)"
  }
}