Assessor Data
Nationwide Tax Assessor Data
The county tax assessor's record for each property: 250+ fields on the parcel, the building, the land, the owner, and the assessed value and tax.
Assessor record
- Assessed value
- $412,000
- Land use
- Single family
- Year built
- 1998
- Living area
- 1,640 sq ft
- Tax amount
- $2,940
TRUSTED BY LEADING BRANDS
- 169M+Parcels
- 3,100+Counties
- 1,000+Data points per property
- 131M+Properties
What's included
What is Assessor Data?
Assessor data is the property record that a county tax assessor keeps for each parcel. It holds the parcel number and address, the owner and the owner's mailing address, the land and the building, the assessed and market values, and the tax bill. BatchData returns these records in one standard format through its API or in bulk files. It is the base dataset of a Property Data plan.
Address
- Street address and ZIP+4
- Latitude and longitude
- County, county code and census tract
Parcel
- Parcel number and tax ID
- Subdivision, lot and legal description
- Property type and land use
Size and age
- Year built and effective year built
- Living area, bedrooms and bathrooms
- Stories and unit counts
Building features
- Roof cover and roof type
- Heating and cooling
- Construction type, pool, garage and basement
Lot
- Lot size and shape
- Zoning and terrain
Assessment
- Assessed value of land and improvements
- County market value
Tax
- Tax amount and tax year
- Tax exemptions and delinquent year
Owner
- Owner names
- Owner mailing address
- Individual or company, and type of ownership
Occupancy and sale
- Owner lives there, or the home is vacant
- Time at the property
- Last sale and previous sale
What assessor data lets you do
Use the county record to know a property before you quote, visit or build.
Know the building before you quote or visit
Read the age, size, roof, systems and construction of a building from its county record.
- Year built and effective year built
- Living area, rooms, stories and unit counts
- Roof cover, heating, cooling and exterior walls
Know who owns it and for how long
See the owner's name and mailing address, whether the owner lives there, and the recorded sales.
- Owner names and mailing address
- Owner lives there, individual or company, and type of ownership
- Time at the property, with the last and previous sale
Read the lot and the tax record
Check the size and zoning of the lot and what the county recorded for value and tax.
- Lot size, frontage, depth, zoning and terrain
- Assessed and market values for land and improvements
- Tax amount, tax year, exemptions and delinquent year
Built for Your Industry
See how each industry uses this data.
Insurance
Fill quote forms from the county record: year built, roof cover, construction type, stories and lot size for each address.
Explore InsuranceHome Services
Find homes by age, heating, cooling and roof cover, and see which ones the owner lives in.
Explore Home ServicesRoofing
Filter homes by year built, roof cover and roof type, then read the owner's name and mailing address.
Explore RoofingSolar
Check roof cover, roof type, stories and living area before a visit, and see if the owner lives in the home.
Explore SolarConstruction & Builders
Find vacant lots by size, zoning and terrain, and read the owner's name and mailing address.
Explore Construction & BuildersPropTech & Software
Show each address with its building, lot, tax and assessment details from one API call.
Explore PropTech & SoftwareProperty Services
Find buildings by type, unit count, size and year built, then read the owner's name and mailing address.
Explore Property ServicesReal Estate Investing
Find tax-delinquent and vacant properties and owners who do not live there, then check lot size, zoning and the last sale.
Explore Real Estate InvestingFlexible Delivery Options
Choose the integration method that fits your workflow
Real-Time API
Look up the assessor record for one property, or search a market by its fields.
- RESTful JSON API
- Property Search and Lookup return all subscribed datasets in one call
- Async delivery to your webhook for large batches
- Developer docs and no-cost sandbox tokens
Bulk Data
Nationwide assessor files for your data warehouse or data lake.
- Choose the datasets and markets you need
- Amazon S3, SFTP or Google Drive delivery; Snowflake and Databricks through Cloud Delivery
- CSV, JSON and Parquet formats
- Weekly, monthly, quarterly or annual deliveries
- Full refresh or delta files
MCP Server
Your AI assistant can look up a property's assessor record through the MCP server.
- Your AI assistant calls BatchData tools to look up and search properties
- Connects to Claude, ChatGPT, Cursor and Claude Code with OAuth sign-in
- Runs on the same API, with datasets set by your account admin
Professional Services
Our Professional Services team helps you choose the assessor fields, set up the delivery and match the data to your records.
- Help choosing datasets, delivery cadence and destination
- Account manager help with token and dataset setup
- Support by email and in-app chat
- Upload a CSV or Excel file and get property data back in the same file
Why BatchData
What You Get With BatchData
One source for property, owner and contact data, by API or by file.
169M+ U.S. Parcels
Coverage of 169M+ U.S. parcels and 131M+ properties.
1,000+ Data Points
Owner, value, mortgage, tax, permit and listing data, with 1,000+ data points for each property.
API or File Delivery
Call the API, or get files in Snowflake, Databricks, Amazon S3, SFTP or Google Drive.
Frequently asked questions
What is assessor data?
In BatchData, assessor data is the property record that a county tax assessor keeps for each parcel. BatchData returns these records in one standard format through its API or in bulk files. Each record holds the parcel number, the address, the owner, the mailing address, the land and the building. It also holds the assessed and market values and the tax bill.
What is in BatchData's tax assessor data?
BatchData's assessor data has 250+ fields from the county tax assessor record. They cover the address, the parcel, the building, its features and the lot. They also cover the assessed and market values, the tax, the owner, the occupancy and the sale history.
How many counties does BatchData's tax assessor data cover?
BatchData's assessor data covers properties in 3,100+ counties, with 169M+ parcels in total. Each county record comes back in one standard format, whatever the county. The county record holds the parcel, the owner, the building and the tax for each property.
Is there an API for property tax and assessment data?
Yes, BatchData's assessor data comes through its API, where Property Lookup returns one property's record and Property Search finds properties by their fields. Bulk files for your data warehouse also deliver it. It is the base dataset of a Property Data plan.
Is the market value in assessor data the same as an estimated value?
No, the market value in assessor data is the value the county assessor recorded. For an estimated value from BatchData, add the Valuation (AVM) add-on. It returns a price range, a confidence score, the date of the estimate, and the equity and loan-to-value fields.
What data can I add to assessor data?
BatchData offers add-ons for assessor data, such as Listing, Property Owner Profile, History (Deed), Valuation (AVM), Comps, Demographics, Permit Summary, Contact Enrichment and BatchRank. Each one is an add-on to a Property Data plan. Valuation (AVM) adds an estimated value with a price range and a confidence score.
Can I look up a property by its APN?
Yes, BatchData Property Lookup finds one property by its APN (assessor's parcel number) with its state and county, or by its address. Each record returns the APN, so you can match it to your own files. The record also holds the legal description of the lot.
Start with assessor data
Talk to a data expert about the assessor fields, delivery options and pricing for your team.