3706 Cosby St, Houston, TX 77021

Compare this assessment

Start with the county value and property facts, then review appraisal comps, recent sales, and prior-year changes to decide whether the assessment is worth challenging. The comps on this page are free to review; email sign-in is only used to save a printable report.

For nearby context, browse ZIP 77021 and South Side assessment pages.

Protest deadline

The 2026 protest deadline was May 15, 2026. The 2027 protest deadline is May 17, 2027. 2027 notices usually arrive in April.

Deadline rule: May 15, or 30 days after your notice of appraised value is delivered, whichever is later. A deadline on a weekend or holiday moves to the next business day. Evidence is reviewed by the Appraisal Review Board (ARB). Dates checked September 27, 2026 against the official source.

Assessment snapshot

These public HCAD records highlight what may be worth checking before you file.

• Assessment changeThe appraised value increased 10.0% from $169,833 in 2025 to $186,816 in 2026.
• Appraised value per square footThe current public record shows about $220 per square foot before any comparable-property adjustments.
• Market/appraised spreadThe county market value is $12,142 above the appraised value used on this page.
• Nearby comparison areaThis page starts the equity review with public records for the South Side neighborhood and ZIP 77021.
• Neighborhood value signalAmong 457 residential records in the same neighborhood, the average appraised value is about $137 per square foot.
• Area year-over-year signalNearby residential records with prior-year values moved about +3.9% on average.

Public appraisal comparison for 2026. Prepared September 30, 2026. Appraisal source: Harris County Appraisal District. Sales data checked in this snapshot: September 24, 2026. Showing the last prepared sales evidence while recent sales are refreshed. Matches consider available size, age, location and property characteristics. How comparisons work.