Harris Value

3723 Cosby St, Houston, TX 77021

796 sqft, built 1940, in South Side Appraised at $151,180 for 2026.

Harris County account 0770890030021

Appraised value
$151,180
Tax year 2026 · after any cap, before exemptions
Living area
796 sqft
$190 per sqft
Year built
1940
Average quality

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 . The 2027 protest deadline is . 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 against the official source.

Assessment snapshot

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

  • Assessment changeThe appraised value increased 9.8% from $137,695 in 2025 to $151,180 in 2026.
  • Appraised value per square footThe current public record shows about $190 per square foot before any comparable-property adjustments.
  • 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.

Comparable assessments

Similar public appraisal records selected for this property's equity comparison.

  • 3611 Cosby St, Houston, TX 77021
    796 sqft | $195/sqft | built 1940 | Similar size (796 vs 796 sqft); Built same year (1940); Lot 11% larger (7,808 vs 7,006 sqft)
    $155,239
  • 3707 Daphne St, Houston, TX 77021
    790 sqft | $185/sqft | built 1945 | Similar size (790 vs 796 sqft); Similar age (1945 vs 1940); Similar lot size (6,569 vs 7,006 sqft)
    $146,322
  • 3703 Cosby St, Houston, TX 77021
    806 sqft | $192/sqft | built 1940 | Similar size (806 vs 796 sqft); Built same year (1940); Lot 13% larger (7,920 vs 7,006 sqft)
    $154,551
  • 3723 Florinda St, Houston, TX 77021
    824 sqft | $179/sqft | built 1945 | Similar size (824 vs 796 sqft); Similar age (1945 vs 1940); Similar lot size (6,569 vs 7,006 sqft)
    $147,745
  • 3630 Alberta St, Houston, TX 77021
    812 sqft | $175/sqft | built 1950 | Similar size (812 vs 796 sqft); Similar lot size (6,706 vs 7,006 sqft); Same quality (Average)
    $141,765

Recent comparable sales

Sales selected by similarity to the subject property. Texas is a non-disclosure state, so these MLS-listed sales are supplemental evidence.

  • 3711 Cosby St, Houston, TX 77021
    September-30-2026 | 970 sqft | $154/sqft | built 1940 | Similar age (1940); Sold after the valuation date
    $149,000
  • 6602 Sidney St, Houston, TX 77021
    July-13-2026 | 857 sqft | $88/sqft | built 1938 | 8% size difference (857 sqft); Similar age (1938); Sold after the valuation date
    $75,000
  • 3747 Dreyfus St, Houston, TX 77021
    August-6-2026 | 879 sqft | $119/sqft | built 1950 | 10% size difference (879 sqft); Moderate age difference (10 years newer); Sold after the valuation date
    $105,000
  • 4505 Perry St, Houston, TX 77021
    June-17-2026 | 888 sqft | $134/sqft | built 1942 | 12% size difference (888 sqft); Similar age (1942); Sold after the valuation date
    $119,000
  • 3301 Tampa St, Houston, TX 77021
    August-18-2026 | 911 sqft | $306/sqft | built 1938 | 14% size difference (911 sqft); Similar age (1938); Sold after the valuation date
    $279,000

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