Collin Value

21c Grindstone Dr, Prosper, TX 75078

1,968 sqft, built 1994, in Collin Green. Appraised at $641,550 for 2026.

Collin County account 1652438

Appraised value
$641,550
Tax year 2026
Living area
1,968 sqft
$326 per sqft
Year built
1994
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 75078, Collin Green, Celina, and Prosper 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 increased 16.0% from $553,000 in 2025 to $641,550 in 2026.
  • Appraised value per square footThe current public record shows about $326 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Collin Green neighborhood and ZIP 75078.
  • Neighborhood value signalAmong 122 residential records in the same neighborhood, the average appraised value is about $318 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +8.7% on average.

Comparable assessments

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

  • 107 Meadow Green St, Prosper, TX 75078
    2,000 sqft | $336/sqft | built 1995 | Similar size (2,000 vs 1,968 sqft); Similar age (1995 vs 1994); Similar lot size (47,045 vs 45,542 sqft)
    $672,988
  • 1c Rhea Mills Cir, Prosper, TX 75078
    2,005 sqft | $334/sqft | built 1992 | Similar size (2,005 vs 1,968 sqft); Similar age (1992 vs 1994); Similar lot size (46,352 vs 45,542 sqft)
    $669,010
  • 29b Rhea Mills Cir, Prosper, TX 75078
    1,974 sqft | $308/sqft | built 1996 | Similar size (1,974 vs 1,968 sqft); Similar age (1996 vs 1994); Similar lot size (46,940 vs 45,542 sqft)
    $607,034
  • 3a Rhea Mills Cir, Prosper, TX 75078
    2,049 sqft | $300/sqft | built 1995 | Similar size (2,049 vs 1,968 sqft); Similar age (1995 vs 1994); Similar lot size (45,320 vs 45,542 sqft)
    $614,260
  • 106 Meadow Green St, Prosper, TX 75078
    1,806 sqft | $360/sqft | built 1994 | 8% smaller (1,806 vs 1,968 sqft); Built same year (1994); Similar lot size (43,734 vs 45,542 sqft)
    $649,323

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.

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

Up 16.0% in 2026 from 2025.

Appraised value by tax year, with the change from the previous year listed
Tax yearAppraised valueChangeChange %
2026$641,550+$88,550+16.0%
2025$553,000−$10,323−1.8%
2024$563,323−$33,695−5.6%
2023$597,018+$64,626+12.1%
2022$532,392+$132,070+33.0%
2021$400,322+$34,201+9.3%
2020$366,121——
6-year total+$275,429+75.2%