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12 LONGHORN DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath1,378 sqftBuilt 1985

Property at a Glance

This home is estimated between $313,970 and $388,979, with a best estimate of $349,583. That places the property below the L580D75C - LEANDER SAM BASS AREA median of $974,644, in a neighborhood that appreciated 7.9% over the past year.

Estimated Value Range

$313,970 $388,979
Best Estimate
$349,583
WCAD Value
$589,116
Low Confidence

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

There are 5 comparable properties within range, but none are in L580D75C - LEANDER SAM BASS AREA. The estimated range of $313,970 and $388,979 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,340 sqft Built 1983
Raw Value $276,404
Adjusted Value $313,970

Adjusted +$15,102 for 38 sqft more living space and +$22,464 for being newer. Net adjustment: +$37,566.

3 bed 2 bath 1,377 sqft Built 1977
Raw Value $275,328
Adjusted Value $365,580

Adjusted +$397 for 1 sqft more living space and +$89,855 for being newer. Net adjustment: +$90,252.

3 bed 2 bath 1,406 sqft Built 1978
Raw Value $282,088
Adjusted Value $349,583

Adjusted -$11,128 for 28 sqft less living space and +$78,623 for being newer. Net adjustment: +$67,495.

3 bed 2 bath 1,433 sqft Built 1979
Raw Value $284,219
Adjusted Value $329,752

Adjusted -$21,858 for 55 sqft less living space and +$67,391 for being newer. Net adjustment: +$45,533.

3 bed 2 bath 1,312 sqft Built 1979
Raw Value $295,359
Adjusted Value $388,979

Adjusted +$26,229 for 66 sqft more living space and +$67,391 for being newer. Net adjustment: +$93,620.

The Neighborhood

This home is valued 39.6% below the L580D75C - LEANDER SAM BASS AREA median of $974,644. That positions it competitively for buyers comparing within the neighborhood. The neighborhood appreciated 7.9% over the past year.

L580D75C - LEANDER SAM BASS AREA

below average
397 Properties
$974,644 Median Value
+7.9% YoY Change
6% Have Pool
81% Have Garage
This Home
$589,116
Median
$974,644

This home is -39.6% below the subdivision median.

Tax Analysis

The estimated annual property tax is $9,147 across all districts. With a homestead exemption claimed, that drops to $7,527 — saving $1,620 per year. That's $627 per month a buyer should budget. The assessed value increased +21.9% vs the subdivision average of +7.9%. This above-average increase gives a protest opportunity score of 100 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Leander ISDSchool1.0869%$5,776
Williamson CountyCounty0.3694%$1,963
Austin Community Collegespecial0.1034%$550
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$531
Williamson County FM/RdCounty0.0443%$236
Upper Brushy Creek WCIDWater0.0170%$90
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7211%$9,147
100 / 100

There may be a strong case to protest this appraisal.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $349,583 would pay approximately $2,182 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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