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

3850 MAYFIELD RANCH BLVD, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

2 bed2 bath1,425 sqftBuilt 2005

Property at a Glance

This home is estimated between $295,752 and $467,473, with a best estimate of $411,786. That places the property above the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194, in a neighborhood that declined 10.9% over the past year.

Estimated Value Range

$295,752 $467,473
Best Estimate
$411,786
WCAD Value
$324,563
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 $295,752 and $467,473. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3870 MAYFIELD RANCH BLVD, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,726 sqft Built 2005
Raw Value $357,028
Adjusted Value $295,752

Adjusted -$61,276 for 301 sqft less living space. Net adjustment: -$61,276.

3810 MAYFIELD RANCH BLVD, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,261 sqft Built 2005
Raw Value $378,400
Adjusted Value $411,786

Adjusted +$33,386 for 164 sqft more living space. Net adjustment: +$33,386.

3890 MAYFIELD RANCH BLVD, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,120 sqft Built 2005
Raw Value $379,035
Adjusted Value $441,125

Adjusted +$62,090 for 305 sqft more living space. Net adjustment: +$62,090.

3880 MAYFIELD RANCH BLVD, ROUND ROCK, TX 78681
0.00 mi 99% similar Same subdivision
3 bed 2 bath 959 sqft Built 2005
Raw Value $372,608
Adjusted Value $467,473

Adjusted +$94,865 for 466 sqft more living space. Net adjustment: +$94,865.

3 bed 2 bath 1,756 sqft Built 2021
Raw Value $410,055
Adjusted Value $365,084

Adjusted -$67,383 for 331 sqft less living space and +$22,412 for being newer. Net adjustment: -$44,971.

The Neighborhood

This home is valued 11.9% below the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 10.9% over the past year.

R107503F - PRESERVE AT STONE OAK - PH 3 & 4

typical
1,045 Properties
$368,194 Median Value
-10.9% YoY Change
1% Have Pool
99% Have Garage
This Home
$324,563
Median
$368,194

This home is -11.9% below the subdivision median.

Tax Analysis

The estimated annual property tax is $5,840 across all districts. With a homestead exemption claimed, that drops to $4,529 — saving $1,311 per year. That's $377 per month a buyer should budget. The assessed value increased -3.0% vs the subdivision average of -10.9%. This above-average increase gives a protest opportunity score of 40 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$2,899
Round RockCity0.3720%$1,207
Williamson CountyCounty0.3694%$1,199
Austin Community Collegespecial0.1034%$336
Williamson County FM/RdCounty0.0443%$144
Upper Brushy Creek WCIDWater0.0170%$55
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,840
40 / 100

Moderate opportunity to protest.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $411,786 would pay approximately $2,570 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