# Effective year built

Indicates the effective year a building was built, adjusted for major renovations or structural changes.

- API name: `effective_year_built`
- Category: Property
- Type · unit: Text · year
- Addresses with a value: 39.3M (32.8%)
- Latest collection: Oct 1, 2026, refreshed monthly
- How values combine: Read from a single source field.

## Links

- [Catalog page](/catalog/v2/effective_year_built)
- [Published statistics (JSON)](https://static.faraday.ai/figv2/effective_year_built.json)
- [API reference](/docs/reference/getattribute)