Real Estate API Questions

What property data do insurers use, and where does it come from?

Quick Answer

Insurers use the recorded facts of the structure and the lot: construction and exterior wall, roof material and style, year built, building and living area, stories, heating and cooling, pool and garage, and parcel geometry and location. It comes from county assessor, recorder, and GIS offices, and it is used to pre-fill and verify applications, feed replacement-cost tools, scope claims, and analyze a book of business by geography. Carriers either pull it county by county or license it from a provider that normalizes roughly 3,000 county formats into one schema and delivers it by API or bulk transfer.

Summary

Property insurance starts with a description of the property, and most of that description already exists in public records. The assessor has the construction, roof, year built, square footage, and stories. GIS has the parcel boundary and location. Together they answer the questions an application, a claim, and a portfolio review ask about the structure, before anyone asks the applicant. The difficulty is that roughly 3,000 counties publish those facts in their own layouts on their own schedules. A normalized property data provider keys everything to the address and parcel, standardizes the field names, and delivers the record by API into application and claims systems or by bulk file for book-wide analysis. What it does not do is describe the person: the record is about the property, and it is not a consumer report.

The fields that describe the structure

Four groups cover most of what an insurer asks about a property. Structure and construction set the rebuild picture: construction type, exterior wall, roof material and style, foundation, stories, and basement. Size and age set the scale: building and living area, bedrooms and bathrooms, year built, and effective year built. Systems and features fill in the rest of the application: heating and cooling equipment and energy source, water, sewer, gas, and electric service, fireplace, pool, garage, and unit and building counts. Location and parcel place it on the map: coordinates, parcel geometry, census tract, acreage, and zoning.

The same record serves every desk. The application desk reads it to pre-fill and verify. The claims desk reads it to scope a loss against what was recorded. The portfolio desk reads it in aggregate to see how construction, roof, and age are distributed across a book by county, city, or map bounds.

Where the data comes from

Nearly all of it is public record. County assessors publish building characteristics, year built, and square footage as part of the tax roll. County recorders file deeds and transfers, which is how a record shows that a property changed hands. GIS departments publish parcel boundaries, coordinates, and zoning. What is not on file, such as a hazard score or a roof age, is not something the record claims to know.

The difficulty is scale. Each county chooses its own field names, formats, identifiers, and publication cadence, so a carrier writing in more than a few states ends up maintaining a parser per county or buying a one-off extract per market. A provider like Realie collects at the source, normalizes the counties into one schema keyed by parcel, refreshes it on a rolling, per-county cycle as counties publish, so vintage varies by county, and delivers it through an API for per-address lookups or bulk transfers for book-wide work.

What property data is not

Property data describes a parcel, not a person. It is not a consumer report, and Realie is not a consumer reporting agency. Realie's Terms of Use prohibit using the data as a factor in establishing an individual's eligibility for insurance, credit, employment, or housing, or for any other FCRA-regulated purpose, and Realie does not market owner lookups by name.

Property-side insurance workflows sit inside that boundary because they start from an address the carrier already holds: the application in front of a producer, the claim that was just filed, or the policies already on the book. The data describes the structure and the lot, not the policyholder, and it carries no risk scores or ratings. Starting from the address is both the compliant pattern and the one that produces the cleanest data.

Frequently asked questions

Which fields matter most on a homeowners application?
Year built, building and living area, stories, construction type and exterior wall, roof material and style, foundation, heating and cooling equipment, and whether there is a pool, garage, fireplace, or basement. Parcel geometry and coordinates place the property on the map.
Can property data pre-fill and verify an application?
Yes. A single address lookup returns the recorded facts of the structure and the lot, so the form is mostly complete before the applicant types, and the answers can be compared with the county's description of the property.
Does the record include roof age, condition, or hazard scores?
No. The record carries roof material and style, construction, year built, and effective year built, plus condition and quality where the county publishes them. It does not carry a modeled roof age, and Realie does not produce flood, wildfire, hail, or other hazard scores.
Can this data be used for underwriting or rating decisions about a person?
No. It is public-record property data, not a consumer report. Realie's Terms of Use prohibit using it as a factor in an individual's eligibility for insurance or for any other FCRA-regulated purpose. Use it to describe the property.
How is parcel geometry useful to an insurer?
Parcel polygons and coordinates let you place every property in a book on a map, aggregate construction, roof, and age by county, city, or custom bounds, and see where the housing stock is concentrated.
How do insurers access the data?
Through a REST API for per-address lookups inside application, claims, and policy administration systems, or through bulk transfers of state or nationwide datasets delivered to the carrier's cloud storage. Self-service API plans start free, and bulk is licensed separately.