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309 WHETSTONE, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath1,516 sqftBuilt 1984

Property at a Glance

This home is estimated between $339,414 and $395,070, with a best estimate of $359,348. That places the property above the R210480H - Brushy Creek median of $296,542, in a neighborhood that declined 14.6% over the past year.

Estimated Value Range

$339,414 $395,070
Best Estimate
$359,348
WCAD Value
$380,861
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 $339,414 and $395,070. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3 bed 2 bath 1,550 sqft Built 1984
Raw Value $366,931
Adjusted Value $359,348

Adjusted -$7,583 for 34 sqft less living space. Net adjustment: -$7,583.

3609 CORNERSTONE, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,269 sqft Built 1982
Raw Value $290,537
Adjusted Value $348,836

Adjusted +$55,086 for 247 sqft more living space and +$3,213 for being newer. Net adjustment: +$58,299.

3115 FREEMONT ST, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,303 sqft Built 1984
Raw Value $347,567
Adjusted Value $395,070

Adjusted +$47,503 for 213 sqft more living space. Net adjustment: +$47,503.

4001 HILLSIDE DR, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,133 sqft Built 1979
Raw Value $293,501
Adjusted Value $386,950

Adjusted +$85,416 for 383 sqft more living space and +$8,033 for being newer. Net adjustment: +$93,449.

2901 MONUMENT DR, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,212 sqft Built 1982
Raw Value $268,403
Adjusted Value $339,414

Adjusted +$67,798 for 304 sqft more living space and +$3,213 for being newer. Net adjustment: +$71,011.

The Neighborhood

This home is valued 28.4% above the R210480H - Brushy Creek median of $296,542. With 871 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 14.6% over the past year.

R210480H - Brushy Creek

above average
871 Properties
$296,542 Median Value
-14.6% YoY Change
2% Have Pool
94% Have Garage
This Home
$380,861
Median
$296,542

This home is +28.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $7,290 across all districts. With a homestead exemption claimed, that drops to $5,969 — saving $1,321 per year. That's $497 per month a buyer should budget. The assessed value increased -7.3% vs the subdivision average of -14.6%. This above-average increase gives a protest opportunity score of 37 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$3,401
Brushy Creek MUDMUD0.3868%$1,473
Williamson CountyCounty0.3694%$1,407
Austin Community Collegespecial0.1034%$394
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$381
Williamson County FM/RdCounty0.0443%$169
Upper Brushy Creek WCIDWater0.0170%$65
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9141%$7,290
37 / 100

Some opportunity.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $359,348 would pay approximately $2,243 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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