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421 MAPLE RUN, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath1,399 sqftBuilt 1986

Property at a Glance

This home is estimated between $257,298 and $354,979, with a best estimate of $286,192. 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

$257,298 $354,979
Best Estimate
$286,192
WCAD Value
$297,281
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 $257,298 and $354,979. 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 $286,192

Adjusted -$59,242 for 249 sqft less living space and -$17,692 for being older. Net adjustment: -$76,934.

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 $354,979

Adjusted +$69,948 for 294 sqft more living space. Net adjustment: +$69,948.

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 $257,298

Adjusted -$81,606 for 343 sqft less living space. Net adjustment: -$81,606.

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 $259,038

Adjusted -$72,565 for 305 sqft less living space and -$2,949 for being older. Net adjustment: -$75,514.

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 $311,449

Adjusted +$27,837 for 117 sqft more living space. Net adjustment: +$27,837.

The Neighborhood

This home is valued 11.5% below the R510485H - SOUTHCREEK median of $335,905. That positions it competitively for buyers comparing within the neighborhood. 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
$297,281
Median
$335,905

This home is -11.5% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,349 across all districts. With a homestead exemption claimed, that drops to $4,044 — saving $1,305 per year. That's $337 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%$2,655
Round RockCity0.3720%$1,106
Williamson CountyCounty0.3694%$1,098
Austin Community Collegespecial0.1034%$307
Williamson County FM/RdCounty0.0443%$132
Upper Brushy Creek WCIDWater0.0170%$51
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,349

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $286,192 would pay approximately $1,786 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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