Beta Williamson County, TX only — data and coverage are limited during early access.

4029 MASON CV, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,662 sqftBuilt 2014

Property at a Glance

This home is estimated between $522,492 and $959,893, with a best estimate of $701,265. 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

$522,492 $959,893
Best Estimate
$701,265
WCAD Value
$542,966
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $522,492 and $959,893. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

4017 MASON CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,810 sqft Built 2015
Raw Value $514,225
Adjusted Value $701,265

Adjusted +$188,866 for 852 sqft more living space and -$1,826 for being older. Net adjustment: +$187,040.

4018 MASON CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,522 sqft Built 2015
Raw Value $493,284
Adjusted Value $522,492

Adjusted +$31,034 for 140 sqft more living space and -$1,826 for being older. Net adjustment: +$29,208.

4 bed 3 bath 2,592 sqft Built 2004
Raw Value $926,115
Adjusted Value $959,893

Adjusted +$15,517 for 70 sqft more living space and +$18,261 for being newer. Net adjustment: +$33,778.

4025 MASON CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,241 sqft Built 2015
Raw Value $477,050
Adjusted Value $568,548

Adjusted +$93,324 for 421 sqft more living space and -$1,826 for being older. Net adjustment: +$91,498.

4026 MASON CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,881 sqft Built 2015
Raw Value $557,933
Adjusted Value $729,234

Adjusted +$173,127 for 781 sqft more living space and -$1,826 for being older. Net adjustment: +$171,301.

The Neighborhood

This home is valued 3.7% 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
$542,966
Median
$523,371

This home is +3.7% above the subdivision median.

Tax Analysis

The estimated annual property tax is $11,219 across all districts. With a homestead exemption claimed, that drops to $9,648 — saving $1,571 per year. That's $804 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%$5,704
Highlands at Mayfield Ranch MUDMUD0.4850%$2,633
Williamson CountyCounty0.3694%$2,006
Williamson County ESD #9 - Round RockESD0.0999%$542
Williamson County FM/RdCounty0.0443%$241
Upper Brushy Creek WCIDWater0.0170%$92
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$11,219

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $701,265 would pay approximately $4,377 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.

View full property details