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

803 LASSO DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath1,388 sqftBuilt 1979

Property at a Glance

This home is estimated between $291,194 and $358,108, with a best estimate of $311,530. That places the property above the R332479H - CHISHOLM VALLEY & NORTHRIDGE ACRES & WILLOW RUN median of $281,358, in a neighborhood that declined 9.6% over the past year.

Estimated Value Range

$291,194 $358,108
Best Estimate
$311,530
WCAD Value
$284,528
Low Confidence

Based on 5 comparable properties(1 in the same subdivision)

There are 5 comparable properties within range, but few are in R332479H - CHISHOLM VALLEY & NORTHRIDGE ACRES & WILLOW RUN. The estimated range of $291,194 and $358,108 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 1,269 sqft Built 1982
Raw Value $290,537
Adjusted Value $311,530

Adjusted +$25,670 for 119 sqft more living space and -$4,677 for being older. Net adjustment: +$20,993.

3 bed 2 bath 1,303 sqft Built 1984
Raw Value $347,567
Adjusted Value $358,108

Adjusted +$18,336 for 85 sqft more living space and -$7,795 for being older. Net adjustment: +$10,541.

505 DRY CREEK CT, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,254 sqft Built 1984
Raw Value $270,083
Adjusted Value $291,194

Adjusted +$28,906 for 134 sqft more living space and -$7,795 for being older. Net adjustment: +$21,111.

3 bed 2 bath 1,542 sqft Built 1975
Raw Value $383,067
Adjusted Value $356,083

Adjusted -$33,220 for 154 sqft less living space and +$6,236 for being newer. Net adjustment: -$26,984.

3 bed 2 bath 1,212 sqft Built 1982
Raw Value $268,403
Adjusted Value $301,691

Adjusted +$37,965 for 176 sqft more living space and -$4,677 for being older. Net adjustment: +$33,288.

The Neighborhood

This home is valued 1.1% above the R332479H - CHISHOLM VALLEY & NORTHRIDGE ACRES & WILLOW RUN median of $281,358. With 1,006 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 9.6% over the past year.

R332479H - CHISHOLM VALLEY & NORTHRIDGE ACRES & WILLOW RUN

typical
1,006 Properties
$281,358 Median Value
-9.6% YoY Change
2% Have Pool
84% Have Garage
This Home
$284,528
Median
$281,358

This home is +1.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $5,119 across all districts. With a homestead exemption claimed, that drops to $3,817 — saving $1,302 per year. That's $318 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%$2,541
Round RockCity0.3720%$1,058
Williamson CountyCounty0.3694%$1,051
Austin Community Collegespecial0.1034%$294
Williamson County FM/RdCounty0.0443%$126
Upper Brushy Creek WCIDWater0.0170%$48
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$5,119

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $311,530 would pay approximately $1,945 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