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603 HILLBROOK, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath1,598 sqftBuilt 1980

Property at a Glance

This home is estimated between $360,697 and $406,931, with a best estimate of $397,163. 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

$360,697 $406,931
Best Estimate
$397,163
WCAD Value
$310,072
Medium Confidence

Based on 5 comparable properties(3 in the same subdivision)

Based on 5 comparable properties (3 in the same subdivision, 2 nearby), the estimated range is $360,697 and $406,931. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3 bed 2 bath 1,626 sqft Built 1977
Raw Value $398,588
Adjusted Value $397,163

Adjusted -$6,245 for 28 sqft less living space and +$4,820 for being newer. Net adjustment: -$1,425.

3 bed 2 bath 1,550 sqft Built 1984
Raw Value $366,931
Adjusted Value $371,209

Adjusted +$10,705 for 48 sqft more living space and -$6,427 for being older. Net adjustment: +$4,278.

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 $360,697

Adjusted +$73,373 for 329 sqft more living space and -$3,213 for being older. Net adjustment: +$70,160.

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 $406,931

Adjusted +$65,791 for 295 sqft more living space and -$6,427 for being older. Net adjustment: +$59,364.

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 $398,812

Adjusted +$103,704 for 465 sqft more living space and +$1,607 for being newer. Net adjustment: +$105,311.

The Neighborhood

This home is valued 4.6% 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

typical
871 Properties
$296,542 Median Value
-14.6% YoY Change
2% Have Pool
94% Have Garage
This Home
$310,072
Median
$296,542

This home is +4.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $5,935 across all districts. With a homestead exemption claimed, that drops to $4,628 — saving $1,307 per year. That's $386 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%$2,769
Brushy Creek MUDMUD0.3868%$1,199
Williamson CountyCounty0.3694%$1,146
Austin Community Collegespecial0.1034%$321
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$310
Williamson County FM/RdCounty0.0443%$137
Upper Brushy Creek WCIDWater0.0170%$53
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9141%$5,935

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $397,163 would pay approximately $2,479 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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