Harris Value

18407 Willow Moss Dr, Katy, TX 77449

2,085 sqft, built 1998, in Autumn Run Appraised at $249,666 for 2026.

Harris County account 1153750080006

Appraised value
$249,666
Tax year 2026 · after any cap, before exemptions
Market value
$277,506
Living area
2,085 sqft
$120 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 $208,055 in 2025 to $249,666 in 2026.
  • Appraised value per square footThe current public record shows about $120 per square foot before any comparable-property adjustments.
  • Market/appraised spreadThe county market value is $27,840 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.

  • 6639 Amberfield Ln, Katy, TX 77449
    2,072 sqft | $146/sqft | built 2001 | Similar size (2,072 vs 2,085 sqft); Similar age (2001 vs 1998); Similar lot size (6,320 vs 6,369 sqft)
    $301,800
  • 6631 Amberfield Ln, Katy, TX 77449
    2,096 sqft | $151/sqft | built 2001 | Similar size (2,096 vs 2,085 sqft); Similar age (2001 vs 1998); Similar lot size (6,525 vs 6,369 sqft)
    $316,951
  • 18430 Forest Dew Dr, Katy, TX 77449
    2,024 sqft | $131/sqft | built 1998 | Similar size (2,024 vs 2,085 sqft); Built same year (1998); Similar lot size (6,518 vs 6,369 sqft)
    $265,389
  • 6630 Betonica Ln, Katy, TX 77449
    2,043 sqft | $145/sqft | built 2001 | Similar size (2,043 vs 2,085 sqft); Similar age (2001 vs 1998); Similar lot size (6,300 vs 6,369 sqft)
    $295,432
  • 18307 Willow Moss Dr, Katy, TX 77449
    2,177 sqft | $122/sqft | built 1999 | Similar size (2,177 vs 2,085 sqft); Similar age (1999 vs 1998); Similar lot size (6,300 vs 6,369 sqft)
    $265,084

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.

  • 20335 Sabal Palms Dr, Katy, TX 77449
    August-25-2026 | 1,994 sqft | $135/sqft | built 2001 | Similar size (1,994 sqft); Similar age (2001); Sold after the valuation date
    $270,000
  • 20030 Mason Creek Dr, Katy, TX 77449
    August-7-2026 | 2,025 sqft | $131/sqft | built 2001 | Similar size (2,025 sqft); Similar age (2001); Sold after the valuation date
    $265,000
  • 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
  • 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

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.