Harris Value

3927 Cosby St, Houston, TX 77021

1,423 sqft, built 2015, in South Side Appraised at $273,145 for 2026.

Harris County account 0752380090017

Appraised value
$273,145
Tax year 2026 · after any cap, before exemptions
Living area
1,423 sqft
$192 per sqft
Year built
2015
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 5.8% from $258,244 in 2025 to $273,145 in 2026.
  • Appraised value per square footThe current public record shows about $192 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 581 residential records in the same neighborhood, the average appraised value is about $133 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +9.1% on average.

Comparable assessments

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

  • 3910 Tolnay St, Houston, TX 77021
    1,401 sqft | $218/sqft | built 2021 | Similar size (1,401 vs 1,423 sqft); Similar lot size (6,150 vs 6,150 sqft); Same quality (Average)
    $305,471
  • 6335 Sherwood Dr, Houston, TX 77021
    1,402 sqft | $237/sqft | built 2022 | Similar size (1,402 vs 1,423 sqft); Similar lot size (6,036 vs 6,150 sqft); Same quality (Average)
    $332,142
  • 3938 Tolnay St, Houston, TX 77021
    1,377 sqft | $89/sqft | built 2022 | Similar size (1,377 vs 1,423 sqft); Similar lot size (6,150 vs 6,150 sqft); Same quality (Average)
    $122,788
  • 6423 Sherwood Dr, Houston, TX 77021
    1,472 sqft | $195/sqft | built 2024 | Similar size (1,472 vs 1,423 sqft); Similar lot size (6,099 vs 6,150 sqft); Same quality (Average)
    $286,919
  • 6611 Eastwood St, Houston, TX 77021
    1,404 sqft | $184/sqft | built 2017 | Similar size (1,404 vs 1,423 sqft); Similar age (2017 vs 2015); Lot 16% smaller (5,150 vs 6,150 sqft)
    $258,860

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.

  • 3521 Lydia St, Houston, TX 77021
    July-15-2026 | 1,609 sqft | $140/sqft | built 2006 | 13% size difference (1,609 sqft); Moderate age difference (9 years older); Sold after the valuation date
    $224,900
  • 5004 Elizabeth City St, Houston, TX 77021
    September-18-2026 | 1,643 sqft | $154/sqft | built 2025 | Moderate age difference (10 years newer); Sold after the valuation date
    $253,510
  • 7010 Sidney St, Houston, TX 77021
    August-10-2026 | 1,585 sqft | $182/sqft | built 2026 | 11% size difference (1,585 sqft); Sold after the valuation date
    $289,000
  • 6423 Madrid St, Houston, TX 77021
    September-28-2026 | 1,693 sqft | $189/sqft | built 2025 | Moderate age difference (10 years newer); Sold after the valuation date
    $319,990
  • 6320 Paris St, Houston, TX 77021
    June-12-2026 | 1,089 sqft | $211/sqft | built 2021 | Moderate age difference (6 years newer); Sold after the valuation date
    $230,000

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.