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3901 OBSIDIAN LN, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,146 sqftBuilt 2007

Property at a Glance

This home is estimated between $752,801 and $935,501, with a best estimate of $797,366. 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

$752,801 $935,501
Best Estimate
$797,366
WCAD Value
$938,486
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 $752,801 and $935,501 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 $874,965

Adjusted -$29,684 for 73 sqft less living space. Net adjustment: -$29,684.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $774,098

Adjusted -$3,253 for 8 sqft less living space and -$83,371 for being older. Net adjustment: -$86,624.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $752,801

Adjusted +$93,524 for 230 sqft more living space and +$97,266 for being newer. Net adjustment: +$190,790.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $797,366

Adjusted +$93,524 for 230 sqft more living space and +$125,056 for being newer. Net adjustment: +$218,580.

4 bed 3 bath 1,811 sqft Built 2014
Raw Value $702,015
Adjusted Value $935,501

Adjusted +$136,220 for 335 sqft more living space and +$97,266 for being newer. Net adjustment: +$233,486.

The Neighborhood

This home is in line with the R147606C - WALSH RANCH median of $933,667. 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
$938,486
Median
$933,667

This home is +0.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $16,748 across all districts. With a homestead exemption claimed, that drops to $15,333 — saving $1,415 per year. That's $1,278 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%$7,987
Williamson CountyCounty0.3694%$3,304
Walsh Ranch MUDMUD0.3455%$3,090
Austin Community Collegespecial0.1034%$925
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$894
Williamson County FM/RdCounty0.0443%$396
Upper Brushy Creek WCIDWater0.0170%$152
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$16,748

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $797,366 would pay approximately $4,977 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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