Sold in Secret, Taxed in the Dark: Why Off-Market Home Sales May Be Raising Your Property Taxes

Off-market home sales, particularly in states with nondisclosure laws, may be contributing to inflated property tax bills for other homeowners by obscuring crucial valuation data. While the debate around private listings has largely focused on seller privacy, buyer access, and achieving optimal sale prices, a more significant implication arises in jurisdictions where sale prices are already kept out of public records. In these "nondisclosure states," the combination of private listings and withheld public sale data creates a "second layer of secrecy," potentially allowing sellers to manipulate their tax assessments.

Sergio Gárate, a real estate researcher at Emory University, encountered this issue firsthand in Mississippi, a nondisclosure state. He found that a significant portion of comparable sale prices were unavailable, hindering his ability to understand the local market as a new homebuyer. This experience led him to investigate the consequences of hidden housing data, concluding that information asymmetry benefits those who can access or withhold sale prices, potentially at the expense of others. In areas where private listings and nondisclosure laws intersect, individuals with the ability to conceal or selectively disclose sale information may also gain an advantage in lowering their property tax liabilities.

The core issue is that property tax assessments are typically based on recent sales of comparable properties within a given area. When these sales are conducted off-market and their prices are not publicly disclosed, tax assessors have less accurate and comprehensive data to work with. This can lead to assessments that do not reflect the true market value of properties, potentially resulting in higher tax burdens for homeowners whose properties are assessed based on incomplete or outdated information. The lack of transparency in these transactions creates an uneven playing field, where some homeowners may inadvertently subsidize others due to the opacity of the real estate market and its impact on public revenue.

Several states are already enacting legislation to address the practice of private listings, with Washington, Connecticut, and Wisconsin having passed laws restricting them, and New York awaiting its governor's signature. These legislative efforts highlight a growing awareness of the potential for unfairness and market distortions caused by off-market sales. However, the specific impact on property tax assessments in nondisclosure states remains a critical, yet often overlooked, consequence of this trend, suggesting a need for further examination and potential policy adjustments to ensure equitable taxation.