Home year built
Four-digit year of original construction for the primary building on the parcel. Known or imputed for 80.1 million addresses — 67.6% of the addresses Faraday knows.
At a glance
- Coverage today
- 67.6%
- Typical coverage
- 66.4%
- Addresses with a value
- 80.1M
- Median
- 1,981 years
- Most values come
- from the address
- Latest collection
- May 1, 2026
Distribution
n = 80,125,910Share of addresses with a known value in each band. The middle 50% falls between 1,958 and 2,001 years, shaded darkest.
P10 means 10% of addresses have a value at or below this one, and P90 means 90% do. P25 and P75 bound the middle half. The median is the middle: half are below it, half above.
Median over time
1,980 years1,980 years → 1,980 years across 12 collections, shaded between P25 and P75. Estimated from a 1% sample of addresses.
Coverage
Latest collection: 137,136,830 addressesCoverage by state
Percentage of addresses in each state with a value.
Coverage over time
67.6% todayShare of addresses holding a value at each monthly snapshot. A value carries forward for one year.
How we arrive at a value
Whether a value was observed on the person themselves, carried from their address, or estimated from the people around them.
- On the person — 0%
- Not used for this attribute — no value is inherited this way.
- From address — 100%
- Carried from what we know about the household at their address.
- From geography — 0%
- Not used for this attribute — no value is inherited this way.
Coverage, in context
Where 67.6% sits on the catalog’s own coverage range.
Higher coverage than 72% of address-level attributes in the catalog
Freshness
How recently this was collected, and how often a new collection arrives. Each bar is the number of addresses in that collection. Gaps are real — collection is periodic, not continuous.
Change between collections
The share of addresses whose value is different from the previous collection.
of addresses changed value between the two most recent collections — 150.2× steadier than the catalog median of 13.5%.
Contribution ledger
30 ingestions
2 authorities contributed since Jul 2023.
| Observed | Ingested | Count | ID |
|---|---|---|---|
| 2026-05-01 | 2026-09-10 | 266,506,942 | c5492806… |
| 2026-05-01 | 2026-07-01 | 125,639,012 | f9d55800… |
| 2026-04-01 | 2026-07-01 | 121,548,788 | 178f88a6… |
| 2026-03-01 | 2026-07-01 | 264,096,977 | 1181277b… |
| 2026-03-01 | 2026-07-01 | 72,154,489 | a1e715b0… |
Technical details
- API name
- home_year_built
- Category
- fig/property
- Type · unit
- Integer · year
- Statistical type
- interval
- Allowed values
- null
- Derivations
- Observed
- — the attribute is directly observed.
- Directionality
- Higher value means more recent year.
- Deprecation
- false
In a payload
{
"attributes": {
"home_year_built": 1981
}
}