Collin Value

12a Rhea Mills Cir, Prosper, TX 75078

2,248 sqft, built 1999, in Collin Green. Appraised at $665,412 for 2026.

Collin County account 1651581

Appraised value
$665,412
Tax year 2026
Living area
2,248 sqft
$296 per sqft
Year built
1999

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 9.4% from $608,327 in 2025 to $665,412 in 2026.
  • Appraised value per square footThe current public record shows about $296 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.

  • 18a Rhea Mills Cir, Prosper, TX 75078
    2,261 sqft | $274/sqft | built 1994 | Similar size (2,261 vs 2,248 sqft); Similar age (1994 vs 1999); Similar lot size (45,302 vs 44,070 sqft)
    $619,822
  • 105 Meadow Green St, Prosper, TX 75078
    2,267 sqft | $285/sqft | built 1997 | Similar size (2,267 vs 2,248 sqft); Similar age (1997 vs 1999); Similar lot size (47,045 vs 44,070 sqft)
    $646,206
  • 14a Rhea Mills Cir, Prosper, TX 75078
    2,252 sqft | $330/sqft | built 2012 | Similar size (2,252 vs 2,248 sqft); Similar lot size (43,560 vs 44,070 sqft); Same neighborhood
    $742,925
  • 104 Collin Ct, Prosper, TX 75078
    2,181 sqft | $289/sqft | built 1987 | Similar size (2,181 vs 2,248 sqft); Similar lot size (43,952 vs 44,070 sqft); Same neighborhood
    $629,763
  • 20b Grindstone Dr, Prosper, TX 75078
    2,295 sqft | $285/sqft | built 1998 | Similar size (2,295 vs 2,248 sqft); Similar age (1998 vs 1999); Similar lot size (46,701 vs 44,070 sqft)
    $653,957

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 | 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 9.4% in 2026 from 2025.

Appraised value by tax year, with the change from the previous year listed
Tax yearAppraised valueChangeChange %
2026$665,412+$57,085+9.4%
2025$608,327+$50,273+9.0%
2024$558,054−$35,748−6.0%
2023$593,802+$32,124+5.7%
2022$561,678+$138,195+32.6%
2021$423,483+$57,616+15.7%
2020$365,867——
6-year total+$299,545+81.9%