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3912 HILLSIDE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath1,410 sqftBuilt 1979

Property at a Glance

This home is estimated between $307,741 and $363,397, with a best estimate of $355,277. That places the property above the R210480H - Brushy Creek median of $296,542, in a neighborhood that declined 14.6% over the past year.

Estimated Value Range

$307,741 $363,397
Best Estimate
$355,277
WCAD Value
$411,400
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $307,741 and $363,397. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3609 CORNERSTONE, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,269 sqft Built 1982
Raw Value $290,537
Adjusted Value $317,163

Adjusted +$31,446 for 141 sqft more living space and -$4,820 for being older. Net adjustment: +$26,626.

3115 FREEMONT ST, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,303 sqft Built 1984
Raw Value $347,567
Adjusted Value $363,397

Adjusted +$23,863 for 107 sqft more living space and -$8,033 for being older. Net adjustment: +$15,830.

4001 HILLSIDE DR, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,133 sqft Built 1979
Raw Value $293,501
Adjusted Value $355,277

Adjusted +$61,776 for 277 sqft more living space. Net adjustment: +$61,776.

3 bed 2 bath 1,542 sqft Built 1975
Raw Value $383,067
Adjusted Value $360,055

Adjusted -$29,439 for 132 sqft less living space and +$6,427 for being newer. Net adjustment: -$23,012.

2901 MONUMENT DR, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,212 sqft Built 1982
Raw Value $268,403
Adjusted Value $307,741

Adjusted +$44,158 for 198 sqft more living space and -$4,820 for being older. Net adjustment: +$39,338.

The Neighborhood

This home is valued 38.7% above the R210480H - Brushy Creek median of $296,542. With 871 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 14.6% over the past year.

R210480H - Brushy Creek

above average
871 Properties
$296,542 Median Value
-14.6% YoY Change
2% Have Pool
94% Have Garage
This Home
$411,400
Median
$296,542

This home is +38.7% above the subdivision median.

Tax Analysis

The estimated annual property tax is $7,875 across all districts. With a homestead exemption claimed, that drops to $6,548 — saving $1,327 per year. That's $546 per month a buyer should budget. The assessed value increased +0.4% vs the subdivision average of -14.6%. This above-average increase gives a protest opportunity score of 50 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$3,674
Brushy Creek MUDMUD0.3868%$1,591
Williamson CountyCounty0.3694%$1,520
Austin Community Collegespecial0.1034%$425
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$411
Williamson County FM/RdCounty0.0443%$182
Upper Brushy Creek WCIDWater0.0170%$70
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9141%$7,875
50 / 100

Moderate opportunity to protest.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $355,277 would pay approximately $2,218 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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