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3918 UPPER PASSAGE LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath1,786 sqftBuilt 2006

Property at a Glance

This home is estimated between $332,538 and $356,085, with a best estimate of $340,992. 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

$332,538 $356,085
Best Estimate
$340,992
WCAD Value
$373,509
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 $332,538 and $356,085. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3926 UPPER PASSAGE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,723 sqft Built 2000
Raw Value $336,252
Adjusted Value $340,672

Adjusted +$12,825 for 63 sqft more living space and -$8,405 for being older. Net adjustment: +$4,420.

3927 UPPER PASSAGE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,682 sqft Built 2000
Raw Value $343,318
Adjusted Value $356,085

Adjusted +$21,172 for 104 sqft more living space and -$8,405 for being older. Net adjustment: +$12,767.

3943 UPPER PASSAGE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,544 sqft Built 2000
Raw Value $291,678
Adjusted Value $332,538

Adjusted +$49,265 for 242 sqft more living space and -$8,405 for being older. Net adjustment: +$40,860.

3922 UPPER PASSAGE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,813 sqft Built 2000
Raw Value $354,893
Adjusted Value $340,992

Adjusted -$5,496 for 27 sqft less living space and -$8,405 for being older. Net adjustment: -$13,901.

3942 UPPER PASSAGE LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,682 sqft Built 2000
Raw Value $331,167
Adjusted Value $343,934

Adjusted +$21,172 for 104 sqft more living space and -$8,405 for being older. Net adjustment: +$12,767.

The Neighborhood

This home is valued 1.4% 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
$373,509
Median
$368,194

This home is +1.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,720 across all districts. With a homestead exemption claimed, that drops to $5,401 — saving $1,319 per year. That's $450 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%$3,336
Round RockCity0.3720%$1,389
Williamson CountyCounty0.3694%$1,380
Austin Community Collegespecial0.1034%$386
Williamson County FM/RdCounty0.0443%$166
Upper Brushy Creek WCIDWater0.0170%$63
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,720

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $340,992 would pay approximately $2,128 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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