Harris Value

3810 Cosby St, Houston, TX 77021

2,440 sqft, built 2021, in South Side Appraised at $485,981 for 2026.

Harris County account 0752380190013

Appraised value
$485,981
Tax year 2026 · after any cap, before exemptions
Living area
2,440 sqft
$199 per sqft
Year built
2021
Good 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 stayed about the same, from $486,098 in 2025 to $485,981 in 2026.
  • Appraised value per square footThe current public record shows about $199 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 123 residential records in the same neighborhood, the average appraised value is about $115 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +5.0% on average.

Comparable assessments

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

  • 3834 Alberta St, Houston, TX 77021
    2,480 sqft | $163/sqft | built 2010 | Similar size (2,480 vs 2,440 sqft); Similar lot size (6,600 vs 6,480 sqft); Same quality (Good)
    $403,700
  • 3606 Wyoming St, Houston, TX 77021
    2,552 sqft | $195/sqft | built 2015 | Similar size (2,552 vs 2,440 sqft); Similar lot size (6,600 vs 6,480 sqft); Same quality (Good)
    $498,234
  • 3507 Amos St, Houston, TX 77021
    2,380 sqft | $178/sqft | built 2016 | Similar size (2,380 vs 2,440 sqft); Similar age (2016 vs 2021); Lot 12% larger (7,250 vs 6,480 sqft)
    $424,453
  • 5011 Yellowstone Blvd, Houston, TX 77021
    2,562 sqft | $92/sqft | built 2025 | 5% larger (2,562 vs 2,440 sqft); Similar age (2025 vs 2021); Similar lot size (6,490 vs 6,480 sqft)
    $236,656
  • 4601 Perry St, Houston, TX 77021
    2,620 sqft | $145/sqft | built 2008 | 7% larger (2,620 vs 2,440 sqft); Similar lot size (6,390 vs 6,480 sqft); Same quality (Good)
    $381,182

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.

  • 6712 Winton St, Houston, TX 77021
    June-12-2026 | 2,388 sqft | $130/sqft | built 2021 | Similar size (2,388 sqft); Similar age (2021); Sold after the valuation date
    $310,000
  • 7034 Sherwood Dr, Houston, TX 77021
    May-28-2026 | 2,252 sqft | $149/sqft | built 2013 | 8% size difference (2,252 sqft); Moderate age difference (8 years older); Sold after the valuation date
    $335,000
  • 4213 Idaho St, Houston, TX 77021
    September-17-2026 | 1,984 sqft | $186/sqft | built 2026 | Moderate age difference (5 years newer); Sold after the valuation date
    $369,000
  • 4206 Old Spanish Trl, Houston, TX 77021
    October-6-2026 | 1,931 sqft | $141/sqft | built 2014 | Moderate age difference (7 years older); Sold after the valuation date
    $272,500
  • 7108 Saint Augustine St, Houston, TX 77021
    September-4-2026 | 1,932 sqft | $179/sqft | built 2023 | Similar age (2023); Sold after the valuation date
    $345,000

Public appraisal comparison for 2026. Prepared . Appraisal source: Harris County Appraisal District. Sales data checked in this snapshot: . Matches consider available size, age, location and property characteristics. How comparisons work.