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521 KAROLYN DR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath1,543 sqftBuilt 1975

Property at a Glance

This home is estimated between $205,670 and $424,720, with a best estimate of $299,177. That places the property below the R462475H - Egger Acres median of $353,946, in a neighborhood that declined 4.4% over the past year.

Estimated Value Range

$205,670 $424,720
Best Estimate
$299,177
WCAD Value
$336,258
Low Confidence

Based on 5 comparable properties(1 in the same subdivision)

There are 5 comparable properties within range, but few are in R462475H - Egger Acres. The estimated range of $205,670 and $424,720 should be treated as a rough guide.

Comparable Properties (5)

521 WEDDINGTON DR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
2 bed 1 bath 1,518 sqft Built 1975
Raw Value $419,287
Adjusted Value $424,720

Adjusted +$5,433 for 25 sqft more living space. Net adjustment: +$5,433.

3 bed 2 bath 1,598 sqft Built 1985
Raw Value $306,958
Adjusted Value $299,177

Adjusted -$11,953 for 55 sqft less living space and +$4,172 for being newer. Net adjustment: -$7,781.

3 bed 2 bath 1,804 sqft Built 1969
Raw Value $264,894
Adjusted Value $205,670

Adjusted -$56,721 for 261 sqft less living space and -$2,503 for being older. Net adjustment: -$59,224.

3 bed 4 bath 2,124 sqft Built 1985
Raw Value $375,595
Adjusted Value $253,503

Adjusted -$126,264 for 581 sqft less living space and +$4,172 for being newer. Net adjustment: -$122,092.

3 bed 2 bath 1,338 sqft Built 1979
Raw Value $361,359
Adjusted Value $407,579

Adjusted +$44,551 for 205 sqft more living space and +$1,669 for being newer. Net adjustment: +$46,220.

The Neighborhood

This home is valued 5.0% below the R462475H - Egger Acres median of $353,946. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 4.4% over the past year.

R462475H - Egger Acres

typical
340 Properties
$353,946 Median Value
-4.4% YoY Change
6% Have Pool
87% Have Garage
This Home
$336,258
Median
$353,946

This home is -5.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $6,050 across all districts. With a homestead exemption claimed, that drops to $4,738 — saving $1,312 per year. That's $395 per month a buyer should budget. The assessed value increased roughly in line with the neighborhood, so a tax protest is unlikely to yield significant savings.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$3,003
Round RockCity0.3720%$1,251
Williamson CountyCounty0.3694%$1,242
Austin Community Collegespecial0.1034%$348
Williamson County FM/RdCounty0.0443%$149
Upper Brushy Creek WCIDWater0.0170%$57
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,050

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $299,177 would pay approximately $1,867 per month (principal and interest only, excluding taxes and insurance).

Data sourced from Williamson County Appraisal District (WCAD), Texas Education Agency (TEA), and Federal Reserve Economic Data (FRED). Assessment values reflect the appraisal district's estimate, not market sale prices. Report generated 4/18/2026.

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