18519 Spellman Ridge Dr, Tomball, TX 77377

Why this page matters for a protest

A strong tax protest page needs the county value, property facts, and enough context to compare this home with similar properties nearby. This page gives homeowners a starting point before reviewing comparable homes and prior-year changes.

The county value changed +10.0% from $650,162 in 2025 to $715,178 in 2026.

Public valuation context

Harris Value uses public HCAD records to frame the first pass at whether this property deserves a closer protest review.

• Value movementThe appraised value increased +10.0% from $650,162 in 2025 to $715,178 in 2026.
• Appraised value per square footThe current public record shows about $229 per square foot before any comparable-property adjustments.
• Market versus appraised valueThe county market value is $31,845 above the appraised value used on this page.
• Local comparison areaThis page starts the equity review with public records for ZIP 77377.
• Neighborhood value signalAmong 194 residential records in the same neighborhood, the average appraised value is about $202 per square foot.
• Neighborhood year-over-year signalNearby residential records with prior-year values moved about +8.3% on average.
• Protest timingIn this market, deadline is usually May 15 (or 30 days after your notice of appraised value is mailed, whichever is later) and evidence is reviewed by the Appraisal Review Board (ARB).