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3917 OBSIDIAN LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed4 bath2,516 sqftBuilt 2008

Property at a Glance

This home is estimated between $889,357 and $1,249,360, with a best estimate of $933,922. That places the property above the R147606C - WALSH RANCH median of $933,667, in a neighborhood that declined 4.6% over the past year.

Estimated Value Range

$889,357 $1,249,360
Best Estimate
$933,922
WCAD Value
$1,027,200
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 $889,357 and $1,249,360 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 $1,011,522

Adjusted +$120,768 for 297 sqft more living space and -$13,895 for being older. Net adjustment: +$106,873.

5 bed 5 bath 2,711 sqft Built 2016
Raw Value $1,217,491
Adjusted Value $1,249,360

Adjusted -$79,292 for 195 sqft less living space and +$111,161 for being newer. Net adjustment: +$31,869.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $910,654

Adjusted +$147,198 for 362 sqft more living space and -$97,266 for being older. Net adjustment: +$49,932.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $889,357

Adjusted +$243,975 for 600 sqft more living space and +$83,371 for being newer. Net adjustment: +$327,346.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $933,922

Adjusted +$243,975 for 600 sqft more living space and +$111,161 for being newer. Net adjustment: +$355,136.

The Neighborhood

This home is valued 10.0% 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
$1,027,200
Median
$933,667

This home is +10.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $19,237 across all districts. With a homestead exemption claimed, that drops to $17,797 — saving $1,440 per year. That's $1,483 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%$9,174
Williamson CountyCounty0.3694%$3,795
Walsh Ranch MUDMUD0.3455%$3,549
Austin Community Collegespecial0.1034%$1,062
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$1,027
Williamson County FM/RdCounty0.0443%$455
Upper Brushy Creek WCIDWater0.0170%$175
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$19,237

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $933,922 would pay approximately $5,830 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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