Property foundation type
Foundation type supporting the primary building (e.g., slab, crawl space, basement, pier-and-beam). Known or imputed for 27.7 million addresses — 23.1% of the addresses Faraday knows.
At a glance
- Coverage today
- 23.1%
- Typical coverage
- 23.1%
- Addresses with a value
- 27.7M
- Share in largest category
- 31.8%
- Most values come
- from the address
- Latest collection
- Oct 1, 2026
How the categories split
How values are spread across the records that have one. Use it to check that the attribute tells records apart: when one value holds nearly everyone, it will not separate audiences much. Categories are ranked by share, largest first. “All other values” groups the smallest into one bar.
Share by category
Share of addresses in each category. 29 categories, of which the 20 largest are shown, with 31.8% in the largest.
Every category
29 categoriesThe chart above draws the 20 largest. Search here for one it does not.
- Slab31.8%8,822,867 addresses
- Concrete22.7%6,302,489 addresses
- Continuous footing9.6%2,658,738 addresses
- Concrete block8.6%2,378,233 addresses
- Pier6.6%1,832,300 addresses
- Brick3.0%820,702 addresses
- Masonry2.9%811,862 addresses
- Continuous wall2.9%791,917 addresses
- Block2.8%782,312 addresses
- Type unknown with crawlspace1.8%505,944 addresses
- Wood1.4%398,681 addresses
- Stem wall1.3%369,093 addresses
- Raised w and crawlspace1.0%278,505 addresses
- Stone0.9%254,625 addresses
- Standard0.6%165,931 addresses
- Type unknown with basement0.6%162,285 addresses
- Dirt and earth0.2%66,338 addresses
- Spread footing0.2%61,286 addresses
- Type unknown with part basemen0.2%58,597 addresses
- Concrete and beam0.2%53,955 addresses
- Pilings0.1%36,687 addresses
- Raised0.1%36,153 addresses
- Cross bridged and walls0.1%31,503 addresses
- Raised w and basement0.084%23,149 addresses
- Grade-beam0.0064%1,762 addresses
- Mud sill0.0035%957 addresses
- Pipe and iron0.00079%219 addresses
- Steel0.00078%215 addresses
- Pre-fab0.00012%34 addresses
Category shares over time
The 5 largest categories, each followed across 12 collections. Estimated from a 1% sample of addresses.
Coverage
How widely Faraday has this attribute, and how precise its values are. How many of your own records get a value also depends on how many of them Faraday matches. The state map shows where coverage is thin. Coverage over time shows whether it is growing or shrinking.
Coverage by state
Percentage of addresses in each state with a value.
Coverage over time
Share 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 23.1% sits on the catalog’s own coverage range.
Higher coverage than 38% of address-level attributes in the catalog
Freshness
Whether the values reflect today. A long gap since the latest collection means they may lag behind what is true now.
Collections
How recently this was collected, and how often a new collection arrives. Each bar is one collection, sized by how many addresses it carried. Gaps are real — collection is periodic, not continuous.
Change between collections
How much values move between collections. Income or life events should move; heavy change in something steady can mean noisy data.
of addresses changed value between the two most recent collections — 674.1× steadier than the catalog median of 16.0%.
Contribution ledger
20 ingestions1 authority contributed since Jul 2023.
| Observed | Ingested | Count | ID |
|---|---|---|---|
| 159,411,145 | eb9d843a-e90f-4c0f-a6a1-6407824973f5 | ||
| 158,647,969 | 37a05688-5576-4b35-a37f-ed31a1298842 | ||
| 158,084,496 | 62d317f2-489c-456e-b464-9cfab59f2deb | ||
| 157,944,429 | f9d55800-7304-4043-b994-dabd7f12b3a8 | ||
| 157,975,076 | 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 Property foundation type back in real time.
- Add
property_foundation_typeto a project. - Send an email, phone, or address to the project's append endpoint. The response carries Property foundation type 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":{"property_foundation_type":"Slab"}}Technical details
null in any row means the label does not apply, or is not recorded, for this attribute.
- API name
- The field to request through the API, and the key it comes back under in a payload.
- property_
foundation_ type - Category
- The catalog group the attribute is filed under.
- fig/property
- Type · unit
- The kind of value and, where it has one, its unit of measure. Counts on this page are in addresses, whatever the unit.
- Text
- Statistical type
- How the values are meant to be read: a measured amount, one of a ranked set, one of an unordered set, or several from an unordered set. The chart's form comes from the published values; for categories without a rank prefix, this label decides whether they are listed in rank order or by size.
- nominal
- Allowed values
- The full list of values, when the attribute has a fixed set.
- null
- Derivations
- How the value is produced, each with its definition.
- Unspecified
- How values combine
- How the values from the attribute's sources become the one value delivered.
- Read from a single source field.
- Directionality
- For ordered values, what a higher value means.
- null
- Deprecation
- True when the attribute is being retired; choose another for new work.
- false