Collin Value

520 Callisto Dr, Prosper, TX 75078

3,457 sqft, built 2025, in Starview Phase 1. Appraised at $1,088,671 for 2026.

Collin County account 2939617

Appraised value
$1,088,671
Tax year 2026
Living area
3,457 sqft
$315 per sqft
Year built
2025
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, Starview Phase 1, 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 changed from $170,000 in 2025 to $1,088,671 in 2026. A change this large often reflects new construction, a reclassification or a record correction, so check it against the county record.
  • Appraised value per square footThe current public record shows about $315 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Starview Phase 1 neighborhood and ZIP 75078.
  • Neighborhood value signalAmong 18 residential records in the same neighborhood, the average appraised value is about $246 per square foot.

Comparable assessments

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

  • 660 Capella Ct, Prosper, TX 75078
    3,634 sqft | $301/sqft | built 2025 | 5% larger (3,634 vs 3,457 sqft); Built same year (2025); Similar lot size (11,543 vs 11,543 sqft)
    $1,095,308
  • 701 Capella Ct, Prosper, TX 75078
    3,718 sqft | $313/sqft | built 2025 | 8% larger (3,718 vs 3,457 sqft); Built same year (2025); Similar lot size (11,194 vs 11,543 sqft)
    $1,163,000
  • 700 Capella Ct, Prosper, TX 75078
    3,349 sqft | $343/sqft | built 2025 | Similar size (3,349 vs 3,457 sqft); Built same year (2025); Lot 12% larger (12,937 vs 11,543 sqft)
    $1,150,289
  • 741 Capella Ct, Prosper, TX 75078
    3,634 sqft | $292/sqft | built 2025 | 5% larger (3,634 vs 3,457 sqft); Built same year (2025); Lot 14% smaller (9,975 vs 11,543 sqft)
    $1,062,308
  • 701 Twilight Dr, Prosper, TX 75078
    3,710 sqft | $297/sqft | built 2025 | 7% larger (3,710 vs 3,457 sqft); Built same year (2025); Lot 14% smaller (9,975 vs 11,543 sqft)
    $1,101,401

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.

  • 1941 Star Trace Pkwy, Prosper, TX 75078
    September-3-2026 | 3,363 sqft | $320/sqft | built 2021 | Similar size (3,363 sqft); Moderate age difference (4 years older); Sold after the valuation date
    $1,075,000
  • 500 Lake Trail Ln, Prosper, TX 75078
    September-18-2026 | 3,412 sqft | $227/sqft | built 2017 | Similar size (3,412 sqft); Moderate age difference (8 years older); Sold after the valuation date
    $775,000
  • 1600 Cottonwood Trl, Prosper, TX 75078
    August-24-2026 | 3,600 sqft | $290/sqft | built 2019 | Similar size (3,600 sqft); Moderate age difference (6 years older); Sold after the valuation date
    $1,045,000
  • 361 Frasier Ln, Prosper, TX 75078
    August-3-2026 | 3,486 sqft | $287/sqft | built 2016 | Similar size (3,486 sqft); Moderate age difference (9 years older); Sold after the valuation date
    $1,000,000
  • 1708 Bridgewater Blvd, Celina, TX 75078
    August-17-2026 | 3,669 sqft | $259/sqft | built 2026 | 6% size difference (3,669 sqft); Similar age (2026); Sold after the valuation date
    $949,000

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 540.4% in 2026 from 2025.

Appraised value by tax year, with the change from the previous year listed
Tax yearAppraised valueChangeChange %
2026$1,088,671+$918,671+540.4%
2025$170,000——
1-year total+$918,671+540.4%