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

3738 HERMANN ST, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed4 bath2,215 sqftBuilt 2014

Property at a Glance

This home is estimated between $465,282 and $1,103,889, with a best estimate of $641,414. 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

$465,282 $1,103,889
Best Estimate
$641,414
WCAD Value
$648,011
Medium Confidence

Based on 5 comparable properties(3 in the same subdivision)

Based on 5 comparable properties (3 in the same subdivision, 2 nearby), the estimated range is $465,282 and $1,103,889. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3736 BAINBRIDGE ST, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $628,291

Adjusted +$66,280 for 299 sqft more living space. Net adjustment: +$66,280.

3601 BAINBRIDGE ST, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $641,414

Adjusted +$66,280 for 299 sqft more living space and -$3,652 for being older. Net adjustment: +$62,628.

4149 PRESIDIO LN, ROUND ROCK, TX 78681
0.00 mi 99% similar Same subdivision
3 bed 2 bath 2,248 sqft Built 2018
Raw Value $479,901
Adjusted Value $465,282

Adjusted -$7,315 for 33 sqft less living space and -$7,304 for being older. Net adjustment: -$14,619.

4 bed 3 bath 2,219 sqft Built 2007
Raw Value $904,649
Adjusted Value $916,545

Adjusted -$887 for 4 sqft less living space and +$12,783 for being newer. Net adjustment: +$11,896.

5 bed 5 bath 2,711 sqft Built 2016
Raw Value $1,217,491
Adjusted Value $1,103,889

Adjusted -$109,950 for 496 sqft less living space and -$3,652 for being older. Net adjustment: -$113,602.

The Neighborhood

This home is valued 23.8% 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
$648,011
Median
$523,371

This home is +23.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $13,390 across all districts. With a homestead exemption claimed, that drops to $11,799 — saving $1,591 per year. That's $983 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%$6,808
Highlands at Mayfield Ranch MUDMUD0.4850%$3,143
Williamson CountyCounty0.3694%$2,394
Williamson County ESD #9 - Round RockESD0.0999%$647
Williamson County FM/RdCounty0.0443%$287
Upper Brushy Creek WCIDWater0.0170%$110
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0663%$13,390

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $641,414 would pay approximately $4,004 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