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3218 ONION BRANCH CV, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath2,343 sqftBuilt 2000

Property at a Glance

This home is estimated between $387,346 and $483,521, with a best estimate of $459,001. That places the property above the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194, in a neighborhood that declined 10.9% over the past year.

Estimated Value Range

$387,346 $483,521
Best Estimate
$459,001
WCAD Value
$384,970
High Confidence

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

Based on 5 comparable properties in R107503F - PRESERVE AT STONE OAK - PH 3 & 4, this home's estimated market value is between $387,346 and $483,521. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3210 ONION BRANCH CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,813 sqft Built 2000
Raw Value $354,923
Adjusted Value $462,817

Adjusted +$107,894 for 530 sqft more living space. Net adjustment: +$107,894.

3214 ONION BRANCH CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,314 sqft Built 2000
Raw Value $381,442
Adjusted Value $387,346

Adjusted +$5,904 for 29 sqft more living space. Net adjustment: +$5,904.

3212 ONION BRANCH CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,208 sqft Built 2000
Raw Value $371,316
Adjusted Value $398,798

Adjusted +$27,482 for 135 sqft more living space. Net adjustment: +$27,482.

3208 ONION BRANCH CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,793 sqft Built 2004
Raw Value $365,953
Adjusted Value $483,521

Adjusted +$111,965 for 550 sqft more living space and +$5,603 for being newer. Net adjustment: +$117,568.

3202 ONION BRANCH CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,747 sqft Built 2000
Raw Value $337,671
Adjusted Value $459,001

Adjusted +$121,330 for 596 sqft more living space. Net adjustment: +$121,330.

The Neighborhood

This home is valued 4.6% above the R107503F - PRESERVE AT STONE OAK - PH 3 & 4 median of $368,194. With 1,045 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 10.9% over the past year.

R107503F - PRESERVE AT STONE OAK - PH 3 & 4

typical
1,045 Properties
$368,194 Median Value
-10.9% YoY Change
1% Have Pool
99% Have Garage
This Home
$384,970
Median
$368,194

This home is +4.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,927 across all districts. With a homestead exemption claimed, that drops to $5,605 — saving $1,322 per year. That's $467 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%$3,438
Round RockCity0.3720%$1,432
Williamson CountyCounty0.3694%$1,422
Austin Community Collegespecial0.1034%$398
Williamson County FM/RdCounty0.0443%$171
Upper Brushy Creek WCIDWater0.0170%$65
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,927

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $459,001 would pay approximately $2,865 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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