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ParcelOps
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A property data API for platform and integration teams

An engineering team gets one endpoint across parcel, assessment, hazard, siting, program, and entity records, reachable from an AI client, an SDK, or the command line. Every source has its own page naming the publisher, the coverage, the update rhythm, and the questions it will not answer. Coverage is uneven county to county and the pages say where, so the gaps can be designed for instead of discovered in production.

85 connected sources reach this work today, each with a page of its own naming the office behind it, how often it changes, and the questions it will not answer. Read from the ParcelOps source registry on September 9, 2026.

Who this is for.

Engineers wiring property data into a product, an agent, or an internal tool, and the teams who have to defend where each field came from.

The integration cost of property data is rarely the call itself. It is the fifteen identifiers, the county that answers differently, and the field that is quietly absent across half the country.

What has to be answered before anything gets wired.

  • Which sources can answer this field, and where do they have coverage?
  • What does each source refuse to answer, and how will that surface in my product?
  • How do I attribute a field back to the office that published it?
  • What happens in the counties and countries with no route?

What answers those questions.

Nobody maintains this roster by hand. Each block claims a kind of source, the directory fills it at build time, and a source connected next month appears here on the build after that.

Parcel and assessment records

County and statewide parcel layers, plus published assessment history.

  • US Public Parcels

    Points to the official parcel source for every US state, DC, and inhabited territory. The same query format works wherever ParcelOps has checked a public source.

  • Texas Statewide Parcels

    Official statewide Texas parcel lookup from the Texas Geographic Information Office. Fields include the address on the tax record, owner, value, land use, and tax year where published.

  • Netherlands Cadastre

    Parcel shapes for the whole Netherlands from the national land registry, Kadaster, on its official PDOK data service.

  • Regrid Premium Parcels

    Nationwide standardized Regrid parcel records for owner, land use, zoning, acreage, and assessed values, using your own Regrid API key.

  • ATTOM Property Data

    ATTOM property detail, county assessment, recorded sale history, and AVM estimates with your own ATTOM API key.

  • RentCast Property & Rents

    RentCast property records, value estimates, long-term rent estimates, and sale comparables with your own RentCast API key.

  • Florida Statewide Parcels

    Statewide 2025 parcel attributes and geometry for all 67 Florida counties.

  • BLM Public Land Survey System

    Official PLSS township, range, section, meridian, and survey geometry.

  • Louisiana State Lands

    A clearly labeled October 25, 2023 snapshot of Louisiana state-owned land tracts.

  • North Dakota Trust Surface Lands

    North Dakota trust-land surface agricultural leases and public-access attributes.

  • Texas County Exemption Rules

    Texas agricultural and wildlife exemption rules, appraisal district contacts, and productivity values for all 254 counties.

  • Texas Appraisal History

    Search all 252 Texas counties by address, owner, legal description, or map point, screen rural land by acreage and owner type, and read full appraisal and exemption history.

  • US Public Assessments

    Search official public assessment records across selected states and major cities, with up to three years where the publisher provides them.

Hazard and environment

Flood, wildfire, seismic, soils, water, habitat, and the enforcement record.

Siting and infrastructure

Grid, water service, transport, airspace, and redevelopment records.

Programs and building context

Housing and commercial program geography, permits, and lending records.

Entities and filings

Business filings, court records, and exclusion lists.

Outside the United States

Worldwide address search, building footprints, and country context.

Catalogued for this role, not live.

ParcelOps has these in the directory for this kind of work and has not connected them, so they answer nothing today and no link goes to them. Naming them is the point of a page like this: USACE National Structure Inventory, FCC Broadband Availability, Census LODES Workforce Context, CDFI Fund Awards, SBA Commercial Loan Context, Spain Cadastre INSPIRE, France Cadastre, UK Land Registry INSPIRE.

What this does not cover.

The paragraph a directory of sources will not write, and the one worth reading before an answer goes into a decision someone else pays for.

  • Coverage is uneven, and the unevenness is the product. A field that answers in one county returns nothing in the next, and the pages say which.
  • This is a read surface over public records plus whatever account you connect. It is not a system of record and it does not keep a property graph for you.
  • There is no listings feed, no consumer data, and no credit data.
  • Sale prices exist only where a state publishes them, so a national price field is not something any source here can supply.
  • A few sources read a connected customer account using the permissions of that account, so what they return depends on who signed in.

Where to look before you wire anything.

Each source publishes its own reference page with the office behind it, the geography it covers, how often it changes, and the questions it will not answer. The county pages do the same at parcel level, one county at a time.

Reading those first costs less than finding a coverage hole through a support ticket.

Questions engineering teams ask.

How do I know a source covers my market?

Read its page before you wire it. Each source page names the publisher, the geography the publisher declares, how often the file changes, and what the source cannot answer. For parcel level work the county pages go further and list the counties with a route that has been queried and checked, along with the fields it returns.

What does an unanswerable question look like?

It comes back as an absence with a reason rather than as an empty object that reads like a zero. A county with no checked route, a state that does not publish sale prices, and a layer that does not reach a coordinate are three different situations, and collapsing them into one null is how a product ends up asserting something false.

Can I try it before wiring anything?

Yes. The free plan includes 50 tool calls for the life of the account, they never expire and never refill, and there is no credit card. Bring an address you already know the answer to and check the answer against what you know.

The work this sits in.

  • Land research

    Parcel records, ground conditions, and what reaches the property line, for raw and rural land.

  • Data center siting

    Power, water, transport, airspace, and hazard screening for a site before anyone signs anything.

  • Commercial real estate

    Parcel and assessment records, building programs, and the entity on the other side of the deal.

  • Residential real estate

    The parcel record, the housing programs that touch an address, and the conditions a buyer asks about.

  • Real estate law

    Federal rule text, rulemaking dockets, party records, and the property facts a filing has to state.

  • Realtors and brokerages

    The facts behind a listing, the programs a buyer may qualify for, and your own files in the same place.

Other roles.

  • Land brokers

    The county record behind a tract, the ground under it, and the questions only a survey or a deed can settle.

  • Site selectors

    Grid, water, hazard, airspace, and parcel screening for candidate sites, before anyone signs a letter of intent.

  • Commercial real estate analysts

    The assessor record, the program geography, the environmental file, and the entity across the table.

  • Residential agents

    The county facts behind an address, the flood answer buyers ask for, and the programs a buyer may fall inside.

  • Appraisers and assessment staff

    Assessment history by year, the parcel record behind it, and the site conditions a report has to mention.

  • Property tax consultants

    Year by year assessment history, the parcel record, and the conditions that argue against a carried value.

  • Environmental consultants

    Facilities, releases, water, wetlands, and land reuse records around a site, with what each record actually asserts.

  • Lenders and underwriters

    The county record behind collateral, the published hazard picture, and the program geography that changes terms.

  • Title and escrow teams

    No recorded documents and no search. What is here is the county record a file gets reconciled against.

  • Real estate attorneys

    Federal rule text with its citation, open rulemaking, party records, and the property facts behind a filing.

Check it against a property you already know.

The free plan includes 50 tool calls for the life of the account. They never expire and never refill, and there is no credit card. The fastest way to judge any of this is to run an address whose answer you can already verify.

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