Editorial Standards

Our Editorial Mission

PropertyTaxByZip is a data-journalism site. Our job is to take the property-tax statistics that the federal government already publishes, including median taxes paid, median home values, and effective rates, and present them in a form that someone planning a move, comparing neighborhoods, or researching housing costs can actually use. We are not a tax-advisory service. We do not prepare returns, recommend strategies, or give personalized tax advice.

Every page on this site is grounded in a primary-source dataset from a U.S. government agency. Where we compute derived metrics such as effective tax rates, we publish the underlying formula on our methodology page. Where we draw on AI assistance for prose, we say so on this page and on the page itself.

Who Writes and Edits This Site

PropertyTaxByZip is published and edited by Evan Brooks, Data Editor. Evan designs the data pipeline, sets the methodology, reviews published prose for accuracy against the underlying data, and signs off on every methodology change. The data editor is not a CPA, tax attorney, or licensed tax professional, and PropertyTaxByZip does not present itself as a tax-advisory service. The data editor's role is the data-editor role: ensure statistics on this site match the source datasets, ensure prose stays inside what the data supports, and decline to publish anything that strays into personalized tax advice.

Long-form features and reported pieces carry an explicit byline at the top of the article. Until we have a contract domain reviewer in place, the data editor reviews and signs off on every long-form piece. We are actively recruiting a CPA, tax attorney, or property-tax appraiser to co-byline future tax-decision features. If you have those credentials and want to write here, email editorial@propertytaxbyzip.com.

Where Our Data Comes From

All ZIP-code-level statistics on this site come from primary government sources. We do not republish data from third-party aggregators. Our active source is:

• U.S. Census Bureau, American Community Survey (ACS) 2019-2023 5-Year Estimates at the ZIP Code Tabulation Area (ZCTA) level. This source provides median real estate taxes paid, median home value, and household income for nearly 30,000 ZCTAs across the United States.

Each source's URL, release date, and pull date are documented on the methodology page. Census data is in the public domain (federal works).

The site currently displays 2019-2023 ACS data. A newer 2020-2024 ACS 5-Year release is available from the Census Bureau, but PropertyTaxByZip will not label pages as updated until the ZIP-level dataset has been refreshed, checked, and redeployed.

How We Check Data Before Publication

We treat the Census table IDs and transformed static dataset as the source of record for ZIP-level pages. Before publishing a data refresh, we check that displayed values match the generated dataset, that Census sentinel values are not shown as real numbers, and that derived effective rates follow the published formula.

State, city, and national ZIP-level benchmarks are reviewed as comparison aids, not as official government statewide medians. Current state and city averages are simple averages across available ZCTAs. They are not weighted by population, owner-occupied housing units, or parcel count.

When a result looks unusual, we do not smooth or replace it with a third-party estimate. We either publish the Census value with the relevant limitation language or hold the page until the source record and transformation can be checked.

How We Use AI

Per-ZIP pages on this site include a short, AI-generated narrative summary that contextualizes the statistics for that ZIP code. The narrative is produced by Claude (Anthropic) from the same source data shown in the statistics tables on the page. The data editor reviews the underlying prompt and spot-checks output before publication; the prompt is constrained to forbid causation claims, tax-strategy recommendations, and any prose that goes beyond what the source statistics support.

If an AI-generated sentence and a statistics table ever conflict, the table and methodology control. We correct the prose rather than changing the number unless the source dataset or transformation is also wrong.

We do not use AI to:

• Generate tax advice, strategy recommendations, or filing guidance.
• Invent statistics, sources, or quotes.
• Write methodology, editorial standards, or correction notices.
• Generate cause-and-effect claims about tax outcomes that aren't grounded in the source data.

When the underlying data is updated, narratives are regenerated to stay consistent. AI-generated prose is always paired with the source statistics so readers can verify the numbers themselves.

Corrections Policy

If you spot a factual error, such as a wrong statistic, a misattributed source, a broken citation, or an outdated value, email editorial@propertytaxbyzip.com with the page URL and the specific issue. We aim to acknowledge every report within five business days and to publish a correction or update the page within ten business days for substantive issues.

Substantive corrections (changes to a statistic, methodology, or claim) are noted in a “Corrections” entry on the page itself with the date of the correction and a short description of what changed. Typographical and formatting fixes are made silently.

Property-level disputes should start with the local assessor, treasurer, or tax collector. If a county record conflicts with our ZCTA median, that does not automatically mean either source is wrong: the Census value is an area estimate, while the county record is a parcel record.

How PropertyTaxByZip Is Funded

PropertyTaxByZip is independently owned and operated. It is part of the ByCounty Network of data sites. Funding comes from two transparent sources:

• Display advertising served by Google AdSense and similar networks. Ads are placed separately from editorial text and data tables. Ad providers do not receive approval rights over our methodology, rankings, page selection, or correction decisions.
• Affiliate links, currently limited to mortgage-lender and property-tax appeal service referrals. Affiliate links are labeled “Sponsored” or otherwise disclosed. We may earn a commission if a reader clicks or purchases through one of those links, but affiliate relationships never determine which ZIP codes or counties we feature on data pages.

We do not accept paid content, sponsored statistics, or advertorials. No data source, advertiser, or affiliate has any influence over the methodology, rankings, or editorial choices on this site.

What Readers Should Verify

The site is designed for research and comparison. It is not a substitute for a tax bill, closing estimate, assessment notice, or advice from a qualified professional. Before making a tax appeal, home purchase, refinance, or relocation decision, verify:

• The property's parcel record with the county assessor or treasurer.
• Current assessed value, taxable value, exemptions, and special assessments.
• School district, municipality, and special district boundaries.
• Whether a sale, renovation, exemption change, or reassessment will change the bill.
• Whether the USPS ZIP code for the address aligns with the Census ZCTA shown here.

Update Cadence

Underlying data is refreshed annually, on the release schedule of the U.S. Census Bureau. Narratives are regenerated when the underlying data for a ZIP code changes. The methodology page displays its own “Last reviewed” date. This editorial-standards page was last reviewed on May 27, 2026.