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427 MAPLE RUN, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath1,526 sqftBuilt 1986

Property at a Glance

This home is estimated between $287,514 and $385,195, with a best estimate of $316,408. That places the property below the R510485H - SOUTHCREEK median of $335,905, in a neighborhood that declined 4.2% over the past year.

Estimated Value Range

$287,514 $385,195
Best Estimate
$316,408
WCAD Value
$344,530
High Confidence

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

Based on 5 comparable properties in R510485H - SOUTHCREEK, this home's estimated market value is between $287,514 and $385,195. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

500 MAPLE RUN, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,648 sqft Built 1998
Raw Value $363,126
Adjusted Value $316,408

Adjusted -$29,026 for 122 sqft less living space and -$17,692 for being older. Net adjustment: -$46,718.

523 MAPLE RUN, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,105 sqft Built 1986
Raw Value $285,031
Adjusted Value $385,195

Adjusted +$100,164 for 421 sqft more living space. Net adjustment: +$100,164.

402 MAPLE RUN, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,742 sqft Built 1986
Raw Value $338,904
Adjusted Value $287,514

Adjusted -$51,390 for 216 sqft less living space. Net adjustment: -$51,390.

401 MAPLE RUN, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,704 sqft Built 1988
Raw Value $334,552
Adjusted Value $289,253

Adjusted -$42,350 for 178 sqft less living space and -$2,949 for being older. Net adjustment: -$45,299.

521 MAPLE RUN, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,282 sqft Built 1986
Raw Value $283,612
Adjusted Value $341,664

Adjusted +$58,052 for 244 sqft more living space. Net adjustment: +$58,052.

The Neighborhood

This home is valued 2.6% above the R510485H - SOUTHCREEK median of $335,905. With 1,020 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 4.2% over the past year.

R510485H - SOUTHCREEK

typical
1,020 Properties
$335,905 Median Value
-4.2% YoY Change
1% Have Pool
97% Have Garage
This Home
$344,530
Median
$335,905

This home is +2.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,199 across all districts. With a homestead exemption claimed, that drops to $4,885 — saving $1,314 per year. That's $407 per month a buyer should budget. The assessed value increased +2.1% vs the subdivision average of -4.2%. This above-average increase gives a protest opportunity score of 32 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$3,077
Round RockCity0.3720%$1,282
Williamson CountyCounty0.3694%$1,273
Austin Community Collegespecial0.1034%$356
Williamson County FM/RdCounty0.0443%$153
Upper Brushy Creek WCIDWater0.0170%$59
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,199
32 / 100

Some opportunity.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $316,408 would pay approximately $1,975 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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