Harris Value

3721 Rio Vista St, Houston, TX 77021

2,574 sqft, built 1945, in South Side Appraised at $440,478 for 2026.

Harris County account 0611380700014

Appraised value
$440,478
Tax year 2026 · after any cap, before exemptions
Living area
2,574 sqft
$171 per sqft
Year built
1945
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 increased 2.6% from $429,399 in 2025 to $440,478 in 2026.
  • Appraised value per square footThe current public record shows about $171 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 73 residential records in the same neighborhood, the average appraised value is about $184 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +2.3% on average.

Comparable assessments

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

  • 3739 Parkwood Dr, Houston, TX 77021
    2,442 sqft | $245/sqft | built 1945 | 5% smaller (2,442 vs 2,574 sqft); Built same year (1945); Similar lot size (11,305 vs 11,970 sqft)
    $599,436
  • 3729 Parkwood Dr, Houston, TX 77021
    2,461 sqft | $228/sqft | built 1949 | Similar size (2,461 vs 2,574 sqft); Similar age (1949 vs 1945); Similar lot size (10,880 vs 11,970 sqft)
    $561,583
  • 3747 Parkwood Dr, Houston, TX 77021
    2,902 sqft | $202/sqft | built 1949 | 13% larger (2,902 vs 2,574 sqft); Similar age (1949 vs 1945); Similar lot size (11,305 vs 11,970 sqft)
    $584,754
  • 3727 Rio Vista St, Houston, TX 77021
    2,445 sqft | $156/sqft | built 1949 | 5% smaller (2,445 vs 2,574 sqft); Similar age (1949 vs 1945); Similar lot size (11,305 vs 11,970 sqft)
    $380,508
  • 3751 Charleston St, Houston, TX 77021
    2,612 sqft | $231/sqft | built 1952 | Similar size (2,612 vs 2,574 sqft); Lot 14% larger (13,600 vs 11,970 sqft); Same quality (Good)
    $603,900

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.

  • 4102 Charleston St, Houston, TX 77021
    August-27-2026 | 2,432 sqft | $164/sqft | built 1952 | 6% size difference (2,432 sqft); Moderate age difference (7 years newer); Sold after the valuation date
    $399,000
  • 3702 Charleston St, Houston, TX 77021
    July-23-2026 | 2,295 sqft | $244/sqft | built 1950 | 11% size difference (2,295 sqft); Moderate age difference (5 years newer); Sold after the valuation date
    $560,000
  • 3631 Luca St, Houston, TX 77021
    June-24-2026 | 2,850 sqft | $140/sqft | built 1945 | 11% size difference (2,850 sqft); Similar age (1945); Sold after the valuation date
    $399,000
  • 3217 Parkwood Dr, Houston, TX 77021
    May-13-2026 | 2,461 sqft | $284/sqft | built 1940 | Similar size (2,461 sqft); Moderate age difference (5 years older); Sold after the valuation date
    $699,000
  • 3327 Charleston St, Houston, TX 77021
    July-17-2026 | 2,142 sqft | $163/sqft | built 1940 | Moderate age difference (5 years older); Sold after the valuation date
    $350,000

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.