Harris Value

3630 Cosby St, Houston, TX 77021

984 sqft, built 1940, in South Side Appraised at $186,889 for 2026.

Harris County account 0770890050008

Appraised value
$186,889
Tax year 2026 · after any cap, before exemptions
Living area
984 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 decreased 1.6% from $190,000 in 2025 to $186,889 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.

  • 3711 Cosby St, Houston, TX 77021
    970 sqft | $165/sqft | built 1940 | Similar size (970 vs 984 sqft); Built same year (1940); Similar lot size (7,254 vs 7,758 sqft)
    $159,654
  • 3726 Wyoming St, Houston, TX 77021
    988 sqft | $229/sqft | built 1940 | Similar size (988 vs 984 sqft); Built same year (1940); Lot 15% smaller (6,600 vs 7,758 sqft)
    $225,988
  • 3622 Cosby St, Houston, TX 77021
    1,008 sqft | $160/sqft | built 1940 | Similar size (1,008 vs 984 sqft); Built same year (1940); Similar lot size (7,564 vs 7,758 sqft)
    $160,825
  • 3606 Alsace St, Houston, TX 77021
    1,018 sqft | $146/sqft | built 1940 | Similar size (1,018 vs 984 sqft); Built same year (1940); Similar lot size (8,167 vs 7,758 sqft)
    $148,166
  • 3718 Cosby St, Houston, TX 77021
    984 sqft | $159/sqft | built 1940 | Similar size (984 vs 984 sqft); Built same year (1940); Similar lot size (7,068 vs 7,758 sqft)
    $156,278

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 size (970 sqft); Similar age (1940); Sold after the valuation date
    $149,000
  • 6226 Sherwood Dr, Houston, TX 77021
    September-15-2026 | 1,073 sqft | $107/sqft | built 1940 | 9% size difference (1,073 sqft); Similar age (1940); Sold after the valuation date
    $114,900
  • 5115 Winnetka St, Houston, TX 77021
    June-24-2026 | 1,086 sqft | $97/sqft | built 1947 | 10% size difference (1,086 sqft); Moderate age difference (7 years newer); Sold after the valuation date
    $105,000
  • 4516 Normandy Way, Houston, TX 77021
    July-23-2026 | 1,168 sqft | $180/sqft | built 1941 | Similar age (1941); Sold after the valuation date
    $210,000
  • 6103 Sherwood Dr, Houston, TX 77021
    May-26-2026 | 1,056 sqft | $109/sqft | built 1940 | 7% size difference (1,056 sqft); Similar age (1940); Sold after the valuation date
    $115,000

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.