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

1909 TONKAWA TRL, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath2,644 sqftBuilt 1988

Property at a Glance

This home is estimated between $363,963 and $915,664, with a best estimate of $445,275. That places the property below the R202681C - Tonkawa & Oak Springs median of $851,894, in a neighborhood that appreciated 3.7% over the past year.

Estimated Value Range

$363,963 $915,664
Best Estimate
$445,275
WCAD Value
$989,407
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in R202681C - Tonkawa & Oak Springs. The estimated range of $363,963 and $915,664 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 2,473 sqft Built 2002
Raw Value $409,932
Adjusted Value $363,963

Adjusted +$59,374 for 171 sqft more living space and -$105,343 for being older. Net adjustment: -$45,969.

3 bed 2 bath 2,168 sqft Built 1984
Raw Value $419,766
Adjusted Value $615,139

Adjusted +$165,275 for 476 sqft more living space and +$30,098 for being newer. Net adjustment: +$195,373.

4 bed 3 bath 2,789 sqft Built 2003
Raw Value $538,150
Adjusted Value $374,937

Adjusted -$50,346 for 145 sqft less living space and -$112,867 for being older. Net adjustment: -$163,213.

3 bed 2 bath 2,418 sqft Built 2004
Raw Value $487,195
Adjusted Value $445,275

Adjusted +$78,471 for 226 sqft more living space and -$120,391 for being older. Net adjustment: -$41,920.

4 bed 3 bath 2,684 sqft Built 2008
Raw Value $1,080,042
Adjusted Value $915,664

Adjusted -$13,889 for 40 sqft less living space and -$150,489 for being older. Net adjustment: -$164,378.

The Neighborhood

This home is valued 16.1% above the R202681C - Tonkawa & Oak Springs median of $851,894. With 154 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 3.7% over the past year.

R202681C - Tonkawa & Oak Springs

above average
154 Properties
$851,894 Median Value
+3.7% YoY Change
7% Have Pool
92% Have Garage
This Home
$989,407
Median
$851,894

This home is +16.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,040 across all districts. With a homestead exemption claimed, that drops to $12,620 — saving $1,420 per year. That's $1,052 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
Round Rock ISDSchool0.8931%$8,210
Williamson CountyCounty0.3694%$3,396
Austin Community Collegespecial0.1034%$951
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$919
Williamson County FM/RdCounty0.0443%$408
Upper Brushy Creek WCIDWater0.0170%$156
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5273%$14,040

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $445,275 would pay approximately $2,779 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