Where high-equity homeowner lists actually come from
Most list providers pull equity estimates from two public sources: recorded mortgage data at the county level and assessed values from the tax assessor's office. The math is straightforward — assessed value minus outstanding loan balance equals estimated equity. The problem is that assessed values lag real market conditions, sometimes by one to three years depending on the county's reappraisal cycle, and not all liens are captured in recorded mortgage data. A second mortgage opened at a credit union may not appear until it is recorded, and some states allow a meaningful delay between origination and recording.
That means the equity figure on any list you buy or pull yourself is an approximation. A property showing 65% equity might genuinely have that much, or the assessed value may be stale and the real figure closer to 45%. This is not a reason to skip equity screening — it is a reason to treat the number as a filter, not a fact, and to verify before you make an offer. Providers that show their methodology (which data sources they use and how often they refresh) are generally more reliable than those that do not.
- County recorder mortgage data — tracks liens but can lag origination by weeks or months
- Tax assessor records — assessed value used as a value proxy, updated on varying cycles by county
- AVM overlays — some providers layer in automated valuation models to sharpen the equity estimate
- HELOC and second-lien coverage — varies widely by provider; ask specifically about this gap
