Collin Value

20b Grindstone Dr, Prosper, TX 75078

2,295 sqft, built 1998, in Collin Green. Appraised at $653,957 for 2026.

Collin County account 1652125

In line with similar homes

8 similar homes nearby support a value at or above your county value.

Appraised value$653,957
Similar homes$686,365
No gap: similar homes are at or above the county value · bars start at $0

How sure: High · 8 similar homes (5 shown below) · public records only

Appraised value
$653,957
Tax year 2026
Living area
2,295 sqft
$285 per sqft
Year built
1998
Homestead
Yes
Owner-occupied exemption on file

What we found

Unequal assessment

Weak

1 of 8 similar homes is assessed lower per square foot. Their similarity-weighted median is $295.94/sqft, but land is valued apart from the home, and some of them have less land value per square foot of home than yours, which counts as $321,630. Counting your land in place of theirs where theirs is less, they support a value of $686,365.

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 13.2% from $577,750 in 2025 to $653,957 in 2026.
  • Appraised value per square footThe current public record shows about $285 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

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.

  • 1218 Chandler Cir, Prosper, TX 75078
    September-8-2026 | 2,657 sqft | $289/sqft | built 1998 | Similar age (1998); Sold after the valuation date
    $769,000
  • 105 Meadow Green St, Prosper, TX 75078
    July-2-2026 | 2,627 sqft | $253/sqft | built 1997 | 14% size difference (2,627 sqft); Similar age (1997); Sold after the valuation date
    $665,000
  • 411 Devonshire Dr, Prosper, TX 75078
    August-20-2026 | 2,274 sqft | $253/sqft | built 2011 | Similar size (2,274 sqft); Sold after the valuation date
    $575,000
  • 1605 Bird Cherry Ln, Prosper, TX 75078
    September-25-2026 | 2,271 sqft | $216/sqft | built 2018 | Similar size (2,271 sqft); Sold after the valuation date
    $490,000
  • 421 Hampshire Dr, Prosper, TX 75078
    July-24-2026 | 2,274 sqft | $249/sqft | built 2011 | Similar size (2,274 sqft); Sold after the valuation date
    $567,000

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 13.2% in 2026 from 2025.

Appraised value by tax year, with the change from the previous year listed
Tax yearAppraised valueChangeChange %
2026$653,957+$76,207+13.2%
2025$577,750+$5,615+1.0%
2024$572,135−$33,987−5.6%
2023$606,122+$52,222+9.4%
2022$553,900+$134,467+32.1%
2021$419,433+$46,844+12.6%
2020$372,589——
6-year total+$281,368+75.5%