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3913 OBSIDIAN LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,389 sqftBuilt 2010

Property at a Glance

This home is estimated between $809,926 and $992,626, with a best estimate of $854,491. That places the property below the R147606C - WALSH RANCH median of $933,667, in a neighborhood that declined 4.6% over the past year.

Estimated Value Range

$809,926 $992,626
Best Estimate
$854,491
WCAD Value
$972,985
Low Confidence

Based on 5 comparable properties(1 in the same subdivision)

There are 5 comparable properties within range, but few are in R147606C - WALSH RANCH. The estimated range of $809,926 and $992,626 should be treated as a rough guide.

Comparable Properties (5)

3323 MARCASITE DR, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,219 sqft Built 2007
Raw Value $904,649
Adjusted Value $932,090

Adjusted +$69,126 for 170 sqft more living space and -$41,685 for being older. Net adjustment: +$27,441.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $831,223

Adjusted +$95,557 for 235 sqft more living space and -$125,056 for being older. Net adjustment: -$29,499.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $809,926

Adjusted +$192,334 for 473 sqft more living space and +$55,581 for being newer. Net adjustment: +$247,915.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $854,491

Adjusted +$192,334 for 473 sqft more living space and +$83,371 for being newer. Net adjustment: +$275,705.

4 bed 3 bath 1,811 sqft Built 2014
Raw Value $702,015
Adjusted Value $992,626

Adjusted +$235,030 for 578 sqft more living space and +$55,581 for being newer. Net adjustment: +$290,611.

The Neighborhood

This home is valued 4.2% above the R147606C - WALSH RANCH median of $933,667. With 239 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 4.6% over the past year.

R147606C - WALSH RANCH

typical
239 Properties
$933,667 Median Value
-4.6% YoY Change
0% Have Pool
100% Have Garage
This Home
$972,985
Median
$933,667

This home is +4.2% above the subdivision median.

Tax Analysis

The estimated annual property tax is $18,222 across all districts. With a homestead exemption claimed, that drops to $16,792 — saving $1,430 per year. That's $1,399 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%$8,690
Williamson CountyCounty0.3694%$3,595
Walsh Ranch MUDMUD0.3455%$3,362
Austin Community Collegespecial0.1034%$1,006
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$973
Williamson County FM/RdCounty0.0443%$431
Upper Brushy Creek WCIDWater0.0170%$165
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$18,222

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $854,491 would pay approximately $5,334 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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