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3435 SANDY KOUFAX LN, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed2 bath1,858 sqftBuilt 2002

Property at a Glance

This home is estimated between $330,942 and $434,798, with a best estimate of $336,408. 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

$330,942 $434,798
Best Estimate
$336,408
WCAD Value
$328,596
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 $330,942 and $434,798. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3601 SANDY KOUFAX LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,892 sqft Built 2003
Raw Value $341,792
Adjusted Value $336,408

Adjusted -$6,336 for 34 sqft less living space and +$952 for being newer. Net adjustment: -$5,384.

3625 SANDY KOUFAX LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,816 sqft Built 2003
Raw Value $326,655
Adjusted Value $335,433

Adjusted +$7,826 for 42 sqft more living space and +$952 for being newer. Net adjustment: +$8,778.

3607 SANDY KOUFAX LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,892 sqft Built 2003
Raw Value $342,596
Adjusted Value $337,212

Adjusted -$6,336 for 34 sqft less living space and +$952 for being newer. Net adjustment: -$5,384.

3611 SANDY KOUFAX LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,858 sqft Built 2003
Raw Value $329,990
Adjusted Value $330,942

Adjusted +$952 for being newer. Net adjustment: +$952.

3413 SANDY KOUFAX LN, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,349 sqft Built 2002
Raw Value $339,949
Adjusted Value $434,798

Adjusted +$94,849 for 509 sqft more living space. Net adjustment: +$94,849.

The Neighborhood

This home is valued 3.3% below the R454400F - Ryan's Crossing Sec 1 Thru 6 median of $339,919. That positions it competitively for buyers comparing within the neighborhood. 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
$328,596
Median
$339,919

This home is -3.3% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,912 across all districts. With a homestead exemption claimed, that drops to $4,601 — saving $1,311 per year. That's $383 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%$2,935
Round RockCity0.3720%$1,222
Williamson CountyCounty0.3694%$1,214
Austin Community Collegespecial0.1034%$340
Williamson County FM/RdCounty0.0443%$146
Upper Brushy Creek WCIDWater0.0170%$56
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,912

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $336,408 would pay approximately $2,100 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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