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3436 SANDY KOUFAX LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed1,002 sqftBuilt 2003

Property at a Glance

This home is estimated between $321,226 and $345,290, with a best estimate of $336,589. That places the property below the R454400F - Ryan's Crossing Sec 1 Thru 6 median of $339,919, in a neighborhood that declined 9.3% over the past year.

Estimated Value Range

$321,226 $345,290
Best Estimate
$336,589
WCAD Value
$354,866
High Confidence

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

Based on 5 comparable properties in R454400F - Ryan's Crossing Sec 1 Thru 6, this home's estimated market value is between $321,226 and $345,290. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3428 SANDY KOUFAX LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,020 sqft Built 2003
Raw Value $348,644
Adjusted Value $345,290

Adjusted -$3,354 for 18 sqft less living space. Net adjustment: -$3,354.

3410 SANDY KOUFAX LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,059 sqft Built 2002
Raw Value $353,039
Adjusted Value $341,465

Adjusted -$10,622 for 57 sqft less living space and -$952 for being older. Net adjustment: -$11,574.

3430 SANDY KOUFAX LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,088 sqft Built 2002
Raw Value $338,204
Adjusted Value $321,226

Adjusted -$16,026 for 86 sqft less living space and -$952 for being older. Net adjustment: -$16,978.

3417 SANDY KOUFAX LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,097 sqft Built 2003
Raw Value $343,477
Adjusted Value $325,774

Adjusted -$17,703 for 95 sqft less living space. Net adjustment: -$17,703.

3415 SANDY KOUFAX LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,069 sqft Built 2003
Raw Value $349,074
Adjusted Value $336,589

Adjusted -$12,485 for 67 sqft less living space. Net adjustment: -$12,485.

The Neighborhood

This home is valued 4.4% above the R454400F - Ryan's Crossing Sec 1 Thru 6 median of $339,919. With 567 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 9.3% over the past year.

R454400F - Ryan's Crossing Sec 1 Thru 6

typical
567 Properties
$339,919 Median Value
-9.3% YoY Change
1% Have Pool
100% Have Garage
This Home
$354,866
Median
$339,919

This home is +4.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,385 across all districts. With a homestead exemption claimed, that drops to $5,069 — saving $1,316 per year. That's $422 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%$3,169
Round RockCity0.3720%$1,320
Williamson CountyCounty0.3694%$1,311
Austin Community Collegespecial0.1034%$367
Williamson County FM/RdCounty0.0443%$157
Upper Brushy Creek WCIDWater0.0170%$60
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,385

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $336,589 would pay approximately $2,101 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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