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4582 POST LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,023 sqftBuilt 2021

Property at a Glance

This home is estimated between $438,273 and $638,277, with a best estimate of $440,243. That places the property below the G799514C - MAYFIELD RANCH median of $523,371, in a neighborhood that declined 9.3% over the past year.

Estimated Value Range

$438,273 $638,277
Best Estimate
$440,243
WCAD Value
$602,729
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 $438,273 and $638,277. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

4609 POST LN, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,112 sqft Built 2020
Raw Value $458,146
Adjusted Value $440,243

Adjusted -$19,729 for 89 sqft less living space and +$1,826 for being newer. Net adjustment: -$17,903.

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 $565,098

Adjusted -$26,822 for 121 sqft less living space and +$9,130 for being newer. Net adjustment: -$17,692.

3625 ASHBURY RD, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,273 sqft Built 2016
Raw Value $485,139
Adjusted Value $438,851

Adjusted -$55,418 for 250 sqft less living space and +$9,130 for being newer. Net adjustment: -$46,288.

3712 ASHBURY RD, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,271 sqft Built 2015
Raw Value $482,291
Adjusted Value $438,273

Adjusted -$54,975 for 248 sqft less living space and +$10,957 for being newer. Net adjustment: -$44,018.

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 $638,277

Adjusted +$61,625 for 278 sqft more living space and +$10,957 for being newer. Net adjustment: +$72,582.

The Neighborhood

This home is valued 15.2% 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

above average
1,093 Properties
$523,371 Median Value
-9.3% YoY Change
1% Have Pool
100% Have Garage
This Home
$602,729
Median
$523,371

This home is +15.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,454 across all districts. With a homestead exemption claimed, that drops to $10,872 — saving $1,582 per year. That's $906 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%$6,332
Highlands at Mayfield Ranch MUDMUD0.4850%$2,923
Williamson CountyCounty0.3694%$2,227
Williamson County ESD #9 - Round RockESD0.0999%$602
Williamson County FM/RdCounty0.0443%$267
Upper Brushy Creek WCIDWater0.0170%$102
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$12,454

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $440,243 would pay approximately $2,748 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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