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4524 POST LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed4 bath1,859 sqftBuilt 2021

Property at a Glance

This home is estimated between $404,300 and $601,923, with a best estimate of $551,421. That places the property above the G799514C - MAYFIELD RANCH median of $523,371, in a neighborhood that declined 9.3% over the past year.

Estimated Value Range

$404,300 $601,923
Best Estimate
$551,421
WCAD Value
$571,848
High Confidence

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

Based on 5 comparable properties in G799514C - MAYFIELD RANCH, this home's estimated market value is between $404,300 and $601,923. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

4582 POST LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,023 sqft Built 2021
Raw Value $602,729
Adjusted Value $566,375

Adjusted -$36,354 for 164 sqft less living space. Net adjustment: -$36,354.

3832 ASHBURY RD, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,144 sqft Built 2016
Raw Value $582,790
Adjusted Value $528,743

Adjusted -$63,177 for 285 sqft less living space and +$9,130 for being newer. Net adjustment: -$54,047.

3864 ASHBURY RD, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,745 sqft Built 2015
Raw Value $565,695
Adjusted Value $601,923

Adjusted +$25,271 for 114 sqft more living space and +$10,957 for being newer. Net adjustment: +$36,228.

4613 POST LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 3 bath 2,162 sqft Built 2020
Raw Value $469,641
Adjusted Value $404,300

Adjusted -$67,167 for 303 sqft less living space and +$1,826 for being newer. Net adjustment: -$65,341.

4504 POST LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,980 sqft Built 2020
Raw Value $576,417
Adjusted Value $551,421

Adjusted -$26,822 for 121 sqft less living space and +$1,826 for being newer. Net adjustment: -$24,996.

The Neighborhood

This home is valued 9.3% above the G799514C - MAYFIELD RANCH median of $523,371. With 1,093 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 9.3% over the past year.

G799514C - MAYFIELD RANCH

typical
1,093 Properties
$523,371 Median Value
-9.3% YoY Change
1% Have Pool
100% Have Garage
This Home
$571,848
Median
$523,371

This home is +9.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $11,816 across all districts. With a homestead exemption claimed, that drops to $10,240 — saving $1,576 per year. That's $853 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
Georgetown ISDSchool1.0506%$6,008
Highlands at Mayfield Ranch MUDMUD0.4850%$2,773
Williamson CountyCounty0.3694%$2,113
Williamson County ESD #9 - Round RockESD0.0999%$571
Williamson County FM/RdCounty0.0443%$253
Upper Brushy Creek WCIDWater0.0170%$97
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$11,816

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $551,421 would pay approximately $3,442 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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