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3900 DORIS LN, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath2,074 sqftBuilt 1975

Property at a Glance

This home is estimated between $476,686 and $945,707, with a best estimate of $909,117. That places the property above the R575583D - RR Rual Sub 122 & Gattis School Rd Area median of $734,399, in a neighborhood that appreciated 3.8% over the past year.

Estimated Value Range

$476,686 $945,707
Best Estimate
$909,117
WCAD Value
$1,032,343
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $476,686 and $945,707. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3848 DORIS LN, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,009 sqft Built 1980
Raw Value $924,725
Adjusted Value $945,707

Adjusted +$20,919 for 65 sqft more living space and +$63 for being newer. Net adjustment: +$20,982.

3855 DORIS LN, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,042 sqft Built 1992
Raw Value $584,832
Adjusted Value $481,164

Adjusted +$10,299 for 32 sqft more living space and +$214 for being newer and -$114,181 for no pool. Net adjustment: -$103,668.

3901 DORIS LN, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,343 sqft Built 1977
Raw Value $1,014,696
Adjusted Value $928,147

Adjusted -$86,574 for 269 sqft less living space and +$25 for being newer. Net adjustment: -$86,549.

3809 DORIS LN, ROUND ROCK, TX 78664
0.00 mi 99% similar Same subdivision
4 bed 3 bath 1,822 sqft Built 1983
Raw Value $827,914
Adjusted Value $909,117

Adjusted +$81,102 for 252 sqft more living space and +$101 for being newer. Net adjustment: +$81,203.

3 bed 2 bath 1,676 sqft Built 1975
Raw Value $348,596
Adjusted Value $476,686

Adjusted +$128,090 for 398 sqft more living space. Net adjustment: +$128,090.

The Neighborhood

This home is valued 40.6% above the R575583D - RR Rual Sub 122 & Gattis School Rd Area median of $734,399. With 213 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 3.8% over the past year.

R575583D - RR Rual Sub 122 & Gattis School Rd Area

above average
213 Properties
$734,399 Median Value
+3.8% YoY Change
4% Have Pool
68% Have Garage
This Home
$1,032,343
Median
$734,399

This home is +40.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,708 across all districts. With a homestead exemption claimed, that drops to $13,280 — saving $1,428 per year. That's $1,107 per month a buyer should budget. The assessed value increased +6.8% vs the subdivision average of +3.8%. This above-average increase gives a protest opportunity score of 35 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$8,601
Williamson CountyCounty0.3694%$3,558
Austin Community Collegespecial0.1034%$996
Williamson County ESD #9 - Round RockESD0.0999%$962
Williamson County FM/RdCounty0.0443%$427
Upper Brushy Creek WCIDWater0.0170%$164
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$14,708
35 / 100

Some opportunity.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $909,117 would pay approximately $5,675 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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