Collin Value

3617 Therondunn Ct, Plano, TX 75023

2,886 sqft, built 1977, in Whiffletree. Appraised at $529,243 for 2026.

Collin County account 276837

Appraised value
$529,243
Tax year 2026
Living area
2,886 sqft
$183 per sqft
Year built
1977

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 75023 and Whiffletree 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 CCAD records highlight what may be worth checking before you file.

  • Assessment changeThe appraised value decreased 0.1% from $529,631 in 2025 to $529,243 in 2026.
  • Appraised value per square footThe current public record shows about $183 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Whiffletree neighborhood and ZIP 75023.
  • Neighborhood value signalAmong 259 residential records in the same neighborhood, the average appraised value is about $197 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +1.1% on average.

Comparable assessments

Showing 5 of the 8 similar homes in this property's equity comparison, from public appraisal records.

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.

  • 2808 Fountain Head Dr, Plano, TX 75023
    September-25-2026 | 2,938 sqft | $179/sqft | built 1979 | Similar size (2,938 sqft); Similar age (1979); Sold after the valuation date
    $525,000
  • 3921 Gettysburg Cir, Plano, TX 75023
    October-9-2026 | 2,939 sqft | $238/sqft | built 1984 | Similar size (2,939 sqft); Moderate age difference (7 years newer); Sold after the valuation date
    $699,900
  • 3617 Hackamore Ct, Plano, TX 75023
    September-14-2026 | 2,710 sqft | $240/sqft | built 1978 | 6% size difference (2,710 sqft); Similar age (1978); Sold after the valuation date
    $650,000
  • 2305 Torrey Pl, Plano, TX 75023
    August-18-2026 | 2,787 sqft | $212/sqft | built 1978 | Similar size (2,787 sqft); Similar age (1978); Sold after the valuation date
    $590,000
  • 3526 S Echo Trl, Plano, TX 75023
    September-18-2026 | 2,638 sqft | $218/sqft | built 1976 | 9% size difference (2,638 sqft); Similar age (1976); Sold after the valuation date
    $574,999

Public appraisal comparison for 2026. Prepared . Appraisal source: Collin Central Appraisal District. Sales data checked in this snapshot: . Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Down 0.1% in 2026 from 2025.

Appraised value by tax year, with the change from the previous year listed
Tax yearAppraised valueChangeChange %
2026$529,243−$388−0.1%
2025$529,631−$53,852−9.2%
2024$583,483+$56,483+10.7%
2023$527,000+$57,000+12.1%
2022$470,000+$92,000+24.3%
2021$378,000+$9,376+2.5%
2020$368,624——
6-year total+$160,619+43.6%

Recent sale history

Recent transfers help establish whether the county value is tracking real market behavior.

  • $699,900 sale recorded on July-17-2026