Effective year built
Indicates the effective year a building was built, adjusted for major renovations or structural changes. Known or imputed for 39.0 million addresses — 32.9% of the addresses Faraday knows.
At a glance
- Coverage today
- 32.9%
- Typical coverage
- 31.4%
- Addresses with a value
- 39.0M
- Share in largest category
- 3.3%
- Most values come
- from the address
- Latest collection
- May 1, 2026
How the categories split
n = 38,971,115Share of addresses in each category. 99+ categories, of which the 20 largest are shown, with 3.3% in the largest.
Every category
99+ categoriesThe chart above draws the 20 largest. Search here for one it does not. This list holds the 100 most common; rarer values are not named.
- 20053.26%1,270,389 addresses
- 20003.00%1,167,925 addresses
- 19952.47%964,446 addresses
- 19902.44%952,616 addresses
- 20062.33%906,314 addresses
- 19802.22%863,706 addresses
- 19852.17%846,781 addresses
- 20042.12%827,165 addresses
- 20032.07%806,097 addresses
- 20021.88%733,194 addresses
- 20071.86%724,752 addresses
- 20011.82%709,903 addresses
- 19991.77%691,680 addresses
- 19981.75%680,634 addresses
- 19751.74%679,610 addresses
- 20101.58%614,841 addresses
- 19701.57%609,904 addresses
- 19971.55%604,145 addresses
- 19961.53%594,613 addresses
- 19931.52%590,910 addresses
- 19941.49%582,429 addresses
- 19891.39%543,201 addresses
- 19601.39%540,601 addresses
- 19881.38%538,116 addresses
- 20081.34%522,759 addresses
- 19781.28%500,106 addresses
- 19871.27%495,082 addresses
- 19921.26%491,792 addresses
- 20151.25%488,691 addresses
- 19791.25%487,526 addresses
- 19861.25%486,637 addresses
- 19911.19%463,892 addresses
- 19651.18%459,363 addresses
- 19841.17%457,253 addresses
- 20201.16%452,205 addresses
- 20211.14%444,740 addresses
- 19771.11%433,833 addresses
- 19831.11%433,727 addresses
- 19501.08%419,970 addresses
- 19721.06%413,992 addresses
Category shares over time
20053.2% (largest)The 5 largest categories, each followed across 12 collections. Estimated from a 1% sample of addresses.
Coverage
Latest collection: 98,683,954 addressesCoverage by state
Percentage of addresses in each state with a value.
Coverage over time
32.9% 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 32.9% sits on the catalog’s own coverage range.
Higher coverage than 48% 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 category changed.
of addresses changed value between the two most recent collections — 74.8× steadier than the catalog median of 13.5%.
Contribution ledger
17 ingestions
1 authority contributed since Jul 2023.
| Observed | Ingested | Count | ID |
|---|---|---|---|
| 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 | 72,154,489 | a1e715b0… |
| 2026-02-01 | 2026-07-01 | 121,865,620 | b70b01b3… |
| 2026-01-01 | 2026-07-01 | 120,035,058 | 2786571a… |
Technical details
- API name
- effective_year_built
- Category
- fig/property
- Type · unit
- Text · year
- Statistical type
- interval
- Allowed values
- null
- Derivations
- null
- Directionality
- Higher value means more recent year.
- Deprecation
- false
In a payload
{
"attributes": {
"effective_year_built": "2005"
}
}