Total basement area
Measures the total square feet of a property's basement, including both finished and unfinished areas. Known or imputed for 19.2 million addresses — 16.1% of the addresses Faraday knows.
You only pay for people we match.
At a glance
- Coverage today
- 16.1%
- Typical coverage
- 15.3%
- Addresses with a value
- 19.2M
- Median
- 1,015 square feet
- Most values come
- from the address
- Latest collection
- Oct 1, 2026
Distribution
n = 19,226,957Share of addresses with a known value in each band. The middle 50% falls between 724 and 1,354 square feet, 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
1,008 square feet1,007 square feet → 1,008 square feet across 12 collections, shaded between P25 and P75. Estimated from a 1% sample of addresses.
Coverage
Latest collection: 103,037,911 addressesCoverage by state
Percentage of addresses in each state with a value.
Coverage over time
16.1% 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 16.1% sits on the catalog’s own coverage range.
Higher coverage than 34% 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 — 84.1× steadier than the catalog median of 16.0%.
Contribution ledger
20 ingestions1 authority contributed since Jul 2023.
| Observed | Ingested | Count | ID |
|---|---|---|---|
| 136,557,522 | eb9d843a-e90f-4c0f-a6a1-6407824973f5 | ||
| 135,716,066 | 37a05688-5576-4b35-a37f-ed31a1298842 | ||
| 134,593,459 | 62d317f2-489c-456e-b464-9cfab59f2deb | ||
| 125,639,012 | f9d55800-7304-4043-b994-dabd7f12b3a8 | ||
| 121,548,788 | 178f88a6-1494-4da4-a8fc-7b5ac45e50b8 | ||
Related attributes
Attributes whose descriptions are closest to this one.
Use it in the API
Send an email, phone, or address. Get Total basement area back in real time.
- Add
total_basement_areato a project. - Send an email, phone, or address to the project's append endpoint. The response carries Total basement area for the matched person.
curl -X POST 'https://api.pro.faraday.ai/v1/projects/YOUR_PROJECT_ID/append' \
-H 'Authorization: Bearer YOUR_API_KEY' \
-H 'Content-Type: application/json' \
-d '{
"email": "jane.doe@example.com"
}'→ {"attributes":{"total_basement_area":1015}}Technical details
- API name
- total_basement_area
- Category
- fig/property
- Type · unit
- Integer · square feet
- Statistical type
- ratio
- Allowed values
- null
- Derivations
- Unspecified
- How values combine
- Read from a single source field.
- Directionality
- Higher number means larger area.
- Deprecation
- false