Harris Value

18419 Willow Moss Dr, Katy, TX 77449

2,135 sqft, built 1998, in Autumn Run Appraised at $265,736 for 2026.

Harris County account 1153750080003

Appraised value
$265,736
Tax year 2026 · after any cap, before exemptions
Market value
$283,584
Living area
2,135 sqft
$124 per sqft
Year built
1998
Average quality
Homestead
Yes
Owner-occupied exemption on file

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 77449, Autumn Run, and Katy 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 20.0% from $221,447 in 2025 to $265,736 in 2026.
  • Appraised value per square footThe current public record shows about $124 per square foot before any comparable-property adjustments.
  • Market/appraised spreadThe county market value is $17,848 above the appraised value used on this page.
  • Nearby comparison areaThis page starts the equity review with public records for the Autumn Run neighborhood and ZIP 77449.
  • Neighborhood value signalAmong 707 residential records in the same neighborhood, the average appraised value is about $143 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +4.4% on average.

Comparable assessments

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

  • 18331 Forest Dew Dr, Katy, TX 77449
    2,083 sqft | $137/sqft | built 2000 | Similar size (2,083 vs 2,135 sqft); Similar age (2000 vs 1998); Similar lot size (6,900 vs 7,108 sqft)
    $284,510
  • 6619 Amberfield Ln, Katy, TX 77449
    2,191 sqft | $139/sqft | built 2001 | Similar size (2,191 vs 2,135 sqft); Similar age (2001 vs 1998); Similar lot size (6,900 vs 7,108 sqft)
    $303,966
  • 6607 Amberfield Ln, Katy, TX 77449
    2,060 sqft | $132/sqft | built 2000 | Similar size (2,060 vs 2,135 sqft); Similar age (2000 vs 1998); Similar lot size (6,910 vs 7,108 sqft)
    $271,567
  • 18415 Forest Dew Dr, Katy, TX 77449
    2,212 sqft | $136/sqft | built 1999 | Similar size (2,212 vs 2,135 sqft); Similar age (1999 vs 1998); Similar lot size (7,369 vs 7,108 sqft)
    $300,986
  • 18402 Dinner Creek Dr, Katy, TX 77449
    2,260 sqft | $145/sqft | built 2000 | 6% larger (2,260 vs 2,135 sqft); Similar age (2000 vs 1998); Similar lot size (7,035 vs 7,108 sqft)
    $328,724

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.

  • 20518 Serringdon Dr, Katy, TX 77449
    August-21-2026 | 2,124 sqft | $155/sqft | built 1993 | Similar size (2,124 sqft); Moderate age difference (5 years older); Sold after the valuation date
    $329,000
  • 3627 Sage Pointe Ct, Katy, TX 77449
    July-24-2026 | 2,124 sqft | $141/sqft | built 2001 | Similar size (2,124 sqft); Similar age (2001); Sold after the valuation date
    $299,900
  • 5447 Mersea Dr, Katy, TX 77449
    August-7-2026 | 2,075 sqft | $130/sqft | built 2000 | Similar size (2,075 sqft); Similar age (2000); Sold after the valuation date
    $269,000
  • 3038 Silver Spur Dr, Katy, TX 77449
    July-31-2026 | 2,176 sqft | $119/sqft | built 1996 | Similar size (2,176 sqft); Similar age (1996); Sold after the valuation date
    $259,999
  • 6463 Smoke House Dr, Katy, TX 77449
    August-17-2026 | 2,224 sqft | $124/sqft | built 1993 | Similar size (2,224 sqft); Moderate age difference (5 years older); Sold after the valuation date
    $275,000

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.