Beta Williamson County, TX only — data and coverage are limited during early access.

3347 MARCASITE DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,107 sqftBuilt 2007

Property at a Glance

This home is estimated between $736,942 and $919,642, with a best estimate of $781,507. 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

$736,942 $919,642
Best Estimate
$781,507
WCAD Value
$1,012,831
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 $736,942 and $919,642 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 $859,107

Adjusted -$45,542 for 112 sqft less living space. Net adjustment: -$45,542.

4 bed 3 bath 2,154 sqft Built 2001
Raw Value $860,722
Adjusted Value $758,240

Adjusted -$19,111 for 47 sqft less living space and -$83,371 for being older. Net adjustment: -$102,482.

4 bed 3 bath 1,916 sqft Built 2014
Raw Value $562,011
Adjusted Value $736,942

Adjusted +$77,665 for 191 sqft more living space and +$97,266 for being newer. Net adjustment: +$174,931.

4 bed 3 bath 1,916 sqft Built 2016
Raw Value $578,786
Adjusted Value $781,507

Adjusted +$77,665 for 191 sqft more living space and +$125,056 for being newer. Net adjustment: +$202,721.

4 bed 3 bath 1,811 sqft Built 2014
Raw Value $702,015
Adjusted Value $919,642

Adjusted +$120,361 for 296 sqft more living space and +$97,266 for being newer. Net adjustment: +$217,627.

The Neighborhood

This home is valued 8.5% 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
$1,012,831
Median
$933,667

This home is +8.5% above the subdivision median.

Tax Analysis

The estimated annual property tax is $18,545 across all districts. With a homestead exemption claimed, that drops to $17,112 — saving $1,433 per year. That's $1,426 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%$8,844
Williamson CountyCounty0.3694%$3,658
Walsh Ranch MUDMUD0.3455%$3,421
Austin Community Collegespecial0.1034%$1,024
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$990
Williamson County FM/RdCounty0.0443%$439
Upper Brushy Creek WCIDWater0.0170%$168
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.8728%$18,545

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $781,507 would pay approximately $4,878 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.

View full property details