18306 Westlock St, 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 $228,680 in 2025 to $251,548 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 $228,680 in 2025 to $251,548 in 2026.
• Appraised value per square footThe current public record shows about $207 per square foot before any comparable-property adjustments.
• Market versus appraised valueThe county market value is $1,704 above the appraised value used on this page.
• Local comparison areaThis page starts the equity review with public records for the Westbourne neighborhood and ZIP 77377.
• Neighborhood value signalAmong 767 residential records in the same neighborhood, the average appraised value is about $175 per square foot.
• Neighborhood year-over-year signalNearby residential records with prior-year values moved about +4.7% 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).