Beta Williamson County, TX only — data and coverage are limited during early access.

3938 UPPER PASSAGE LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath1,025 sqftBuilt 2003

Property at a Glance

This home is estimated between $308,756 and $387,160, with a best estimate of $346,326. That places the property below the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194, in a neighborhood that declined 10.9% over the past year.

Estimated Value Range

$308,756 $387,160
Best Estimate
$346,326
WCAD Value
$379,231
High Confidence

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

Based on 5 comparable properties in R107503F - PRESERVE AT STONE OAK - PH 3 & 4, this home's estimated market value is between $308,756 and $387,160. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3939 UPPER PASSAGE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 922 sqft Built 2000
Raw Value $296,531
Adjusted Value $313,297

Adjusted +$20,968 for 103 sqft more living space and -$4,202 for being older. Net adjustment: +$16,766.

3941 UPPER PASSAGE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,097 sqft Built 2000
Raw Value $365,185
Adjusted Value $346,326

Adjusted -$14,657 for 72 sqft less living space and -$4,202 for being older. Net adjustment: -$18,859.

3940 UPPER PASSAGE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 928 sqft Built 2000
Raw Value $371,615
Adjusted Value $387,160

Adjusted +$19,747 for 97 sqft more living space and -$4,202 for being older. Net adjustment: +$15,545.

3933 UPPER PASSAGE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 922 sqft Built 2000
Raw Value $291,990
Adjusted Value $308,756

Adjusted +$20,968 for 103 sqft more living space and -$4,202 for being older. Net adjustment: +$16,766.

3945 UPPER PASSAGE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 2 bath 1,105 sqft Built 2000
Raw Value $367,596
Adjusted Value $347,108

Adjusted -$16,286 for 80 sqft less living space and -$4,202 for being older. Net adjustment: -$20,488.

The Neighborhood

This home is valued 3.0% above the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194. With 1,045 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 10.9% over the past year.

R107503F - PRESERVE AT STONE OAK - PH 3 & 4

typical
1,045 Properties
$368,194 Median Value
-10.9% YoY Change
1% Have Pool
99% Have Garage
This Home
$379,231
Median
$368,194

This home is +3.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,823 across all districts. With a homestead exemption claimed, that drops to $5,503 — saving $1,320 per year. That's $459 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%$3,387
Round RockCity0.3720%$1,411
Williamson CountyCounty0.3694%$1,401
Austin Community Collegespecial0.1034%$392
Williamson County FM/RdCounty0.0443%$168
Upper Brushy Creek WCIDWater0.0170%$64
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,823

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $346,326 would pay approximately $2,162 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.

View full property details