DTX Value

300 Cosbie Dr, Irving, TX 75063

3 bed / 2 bath, 1,873 sqft, built 1997, in Valley Ranch Appraised at $434,390 for 2026.

Dallas County account 322553100D0180000

Appraised value
$434,390
Tax year 2026
Living area
1,873 sqft
$232 per sqft
Year built
1997
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 75063 and Valley Ranch 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 mailed, 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 DCAD records highlight what may be worth checking before you file.

  • Appraised value per square footThe current public record shows about $232 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Valley Ranch neighborhood and ZIP 75063.
  • Neighborhood value signalAmong 138 residential records in the same neighborhood, the average appraised value is about $225 per square foot.

Comparable assessments

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

  • 10514 Waters Dr, Irving, TX 75063
    1,850 sqft | $224/sqft | built 1994 | Similar size (1,850 vs 1,873 sqft); Similar age (1994 vs 1997); Similar lot size (10,039 vs 10,483 sqft)
    $415,270
  • 10316 Donley Dr, Irving, TX 75063
    2,141 sqft | $203/sqft | built 1994 | 14% larger (2,141 vs 1,873 sqft); Similar age (1994 vs 1997); Same story count (2)
    $434,570
  • 10300 Waters Dr, Irving, TX 75063
    1,809 sqft | $238/sqft | built 1996 | Similar size (1,809 vs 1,873 sqft); Similar age (1996 vs 1997); Same quality (Average)
    $431,100
  • 10202 Donley Dr, Irving, TX 75063
    1,780 sqft | $202/sqft | built 1994 | Similar size (1,780 vs 1,873 sqft); Similar age (1994 vs 1997); Same quality (Average)
    $358,880
  • 401 Manders Ct, Irving, TX 75063
    2,243 sqft | $220/sqft | built 1998 | Similar age (1998 vs 1997); Lot 16% smaller (8,826 vs 10,483 sqft); Same quality (Average)
    $493,010

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.

  • 10113 Carano Ct, Irving, TX 75063
    July-23-2026 | 1,773 sqft | $268/sqft | built 1995 | 5% size difference (1,773 sqft); Similar age (1995); Sold after the valuation date
    $474,900
  • 9703 Raven Ln, Irving, TX 75063
    September-3-2026 | 2,078 sqft | $250/sqft | built 1995 | 11% size difference (2,078 sqft); Similar age (1995); Sold after the valuation date
    $519,000
  • 8605 Wellington Point Dr, Irving, TX 75063
    September-18-2026 | 1,911 sqft | $249/sqft | built 1993 | Similar size (1,911 sqft); Moderate age difference (4 years older); Sold after the valuation date
    $475,000
  • 336 Touchdown Dr, Irving, TX 75063
    May-8-2026 | 1,842 sqft | $244/sqft | built 1993 | Similar size (1,842 sqft); Moderate age difference (4 years older); Sold after the valuation date
    $449,900
  • 8772 Iron Horse Dr, Irving, TX 75063
    September-11-2026 | 1,864 sqft | $228/sqft | built 2011 | Similar size (1,864 sqft); Sold after the valuation date; Same beds (3)
    $425,000

Public appraisal comparison for 2026. Prepared . Appraisal source: Dallas Central 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.