Harris Value

643 Aldersgate Ct, Katy, TX 77450

3,511 sqft, built 1974, in Nottingham Country Appraised at $425,068 for 2026.

Harris County account 1056620000025

Appraised value
$425,068
Tax year 2026 · after any cap, before exemptions
Market value
$431,653
Living area
3,511 sqft
$121 per sqft
Year built
1974
Good quality
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 77450, Nottingham Country, and Katy 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 delivered, 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 HCAD records highlight what may be worth checking before you file.

  • Assessment changeThe appraised value increased 10.0% from $386,426 in 2025 to $425,068 in 2026.
  • Appraised value per square footThe current public record shows about $121 per square foot before any comparable-property adjustments.
  • Market/appraised spreadThe county market value is $6,585 above the appraised value used on this page.
  • Nearby comparison areaThis page starts the equity review with public records for the Nottingham Country neighborhood and ZIP 77450.
  • Neighborhood value signalAmong 508 residential records in the same neighborhood, the average appraised value is about $152 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about +2.8% on average.

Comparable assessments

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

  • 20107 Hardwidge Ct, Katy, TX 77450
    3,516 sqft | $137/sqft | built 1974 | Similar size (3,516 vs 3,511 sqft); Built same year (1974); Similar lot size (11,160 vs 10,920 sqft)
    $482,974
  • 703 Calthorte Ct, Katy, TX 77450
    3,321 sqft | $125/sqft | built 1973 | 5% smaller (3,321 vs 3,511 sqft); Similar age (1973 vs 1974); Similar lot size (10,311 vs 10,920 sqft)
    $415,844
  • 602 Houghton Rd, Katy, TX 77450
    3,360 sqft | $130/sqft | built 1976 | Similar size (3,360 vs 3,511 sqft); Similar age (1976 vs 1974); Similar lot size (10,080 vs 10,920 sqft)
    $436,313
  • 414 Bauxhall Ct, Katy, TX 77450
    3,328 sqft | $128/sqft | built 1973 | 5% smaller (3,328 vs 3,511 sqft); Similar age (1973 vs 1974); Lot 13% larger (12,293 vs 10,920 sqft)
    $425,590
  • 518 Walworten Ct, Katy, TX 77450
    3,450 sqft | $125/sqft | built 1973 | Similar size (3,450 vs 3,511 sqft); Similar age (1973 vs 1974); Lot 18% smaller (8,925 vs 10,920 sqft)
    $430,187

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.

  • 614 Houghton Rd, Katy, TX 77450
    August-4-2026 | 3,125 sqft | $142/sqft | built 1974 | 11% size difference (3,125 sqft); Similar age (1974); Sold after the valuation date
    $445,000
  • 20502 Chadbury Park Dr, Katy, TX 77450
    September-30-2026 | 3,672 sqft | $132/sqft | built 1990 | Similar size (3,672 sqft); Sold after the valuation date
    $484,900
  • 1431 Hoveden Dr, Katy, TX 77450
    August-19-2026 | 3,495 sqft | $209/sqft | built 1980 | Similar size (3,495 sqft); Moderate age difference (6 years newer); Sold after the valuation date
    $729,000
  • 702 Calthorte Ct, Katy, TX 77450
    June-5-2026 | 3,407 sqft | $167/sqft | built 1974 | Similar size (3,407 sqft); Similar age (1974); Sold after the valuation date
    $570,000
  • 1118 Sherfield Ridge Dr, Katy, TX 77450
    August-21-2026 | 3,538 sqft | $201/sqft | built 1989 | Similar size (3,538 sqft); Sold after the valuation date
    $709,700

Public appraisal comparison for 2026. Prepared . Appraisal source: Harris County Appraisal District. Sales data checked in this snapshot: . Showing the last prepared sales evidence while recent sales are refreshed. Matches consider available size, age, location and property characteristics. How comparisons work.