Collin Value

621 Sunbury Ln, Prosper, TX 75078

3,401 sqft, built 2018, in Tanner's Mill Phase 1C. Appraised at $810,000 for 2026.

Collin County account 2707028

Appraised value
$810,000
Tax year 2026
Living area
3,401 sqft
$238 per sqft
Year built
2018
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, Tanner's Mill Phase 1C, 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 decreased 6.7% from $867,763 in 2025 to $810,000 in 2026.
  • Appraised value per square footThe current public record shows about $238 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the Tanner's Mill Phase 1C neighborhood and ZIP 75078.
  • Neighborhood value signalAmong 304 residential records in the same neighborhood, the average appraised value is about $224 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -1.5% on average.

Comparable assessments

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

  • 860 St Peter Ln, Prosper, TX 75078
    3,398 sqft | $251/sqft | built 2017 | Similar size (3,398 vs 3,401 sqft); Similar age (2017 vs 2018); Similar lot size (15,246 vs 15,246 sqft)
    $851,985
  • 720 Sunbury Ln, Prosper, TX 75078
    3,408 sqft | $238/sqft | built 2018 | Similar size (3,408 vs 3,401 sqft); Built same year (2018); Similar lot size (15,681 vs 15,246 sqft)
    $812,050
  • 521 Sunbury Ln, Prosper, TX 75078
    3,460 sqft | $252/sqft | built 2018 | Similar size (3,460 vs 3,401 sqft); Built same year (2018); Similar lot size (15,681 vs 15,246 sqft)
    $870,894
  • 521 Elizabeth Ln, Prosper, TX 75078
    3,473 sqft | $248/sqft | built 2018 | Similar size (3,473 vs 3,401 sqft); Built same year (2018); Similar lot size (15,681 vs 15,246 sqft)
    $861,001
  • 600 Featherstone Ln, Prosper, TX 75078
    3,519 sqft | $233/sqft | built 2018 | Similar size (3,519 vs 3,401 sqft); Built same year (2018); Similar lot size (15,126 vs 15,246 sqft)
    $821,515

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

Down 6.7% in 2026 from 2025.

Appraised value by tax year, with the change from the previous year listed
Tax yearAppraised valueChangeChange %
2026$810,000−$57,763−6.7%
2025$867,763−$96,068−10.0%
2024$963,831+$29,060+3.1%
2023$934,771+$184,381+24.6%
2022$750,390+$190,390+34.0%
2021$560,000——
5-year total+$250,000+44.6%