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

4000 LONE OAK TRL, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed2 bath2,233 sqftBuilt 1993

Property at a Glance

This home is estimated between $823,815 and $1,574,153, with a best estimate of $1,157,521. That places the property above the R201578D - Great Oaks Sec 1, 1 (AMD), & 2 median of $714,415, in a neighborhood that declined 6.8% over the past year.

Estimated Value Range

$823,815 $1,574,153
Best Estimate
$1,157,521
WCAD Value
$584,790
Low Confidence

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

There are 5 comparable properties within range, but few are in R201578D - Great Oaks Sec 1, 1 (AMD), & 2. The estimated range of $823,815 and $1,574,153 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 2,569 sqft Built 1994
Raw Value $1,274,937
Adjusted Value $1,155,250

Adjusted -$104,079 for 336 sqft less living space and -$15,608 for being older. Net adjustment: -$119,687.

4001 LONE OAK TRL, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,030 sqft Built 1979
Raw Value $542,422
Adjusted Value $823,815

Adjusted +$62,881 for 203 sqft more living space and +$218,512 for being newer. Net adjustment: +$281,393.

3 bed 2 bath 2,414 sqft Built 1983
Raw Value $1,057,507
Adjusted Value $1,157,521

Adjusted -$56,066 for 181 sqft less living space and +$156,080 for being newer. Net adjustment: +$100,014.

3 bed 3 bath 2,348 sqft Built 1993
Raw Value $1,259,969
Adjusted Value $1,224,347

Adjusted -$35,622 for 115 sqft less living space. Net adjustment: -$35,622.

3 bed 2 bath 1,940 sqft Built 1984
Raw Value $1,342,921
Adjusted Value $1,574,153

Adjusted +$90,760 for 293 sqft more living space and +$140,472 for being newer. Net adjustment: +$231,232.

The Neighborhood

This home is valued 18.1% below the R201578D - Great Oaks Sec 1, 1 (AMD), & 2 median of $714,415. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 6.8% over the past year.

R201578D - Great Oaks Sec 1, 1 (AMD), & 2

below average
161 Properties
$714,415 Median Value
-6.8% YoY Change
5% Have Pool
74% Have Garage
This Home
$584,790
Median
$714,415

This home is -18.1% below the subdivision median.

Tax Analysis

The estimated annual property tax is $8,931 across all districts. With a homestead exemption claimed, that drops to $7,573 — saving $1,358 per year. That's $631 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%$5,223
Williamson CountyCounty0.3694%$2,160
Austin Community Collegespecial0.1034%$605
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$585
Williamson County FM/RdCounty0.0443%$259
Upper Brushy Creek WCIDWater0.0170%$99
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5273%$8,931

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $1,157,521 would pay approximately $7,225 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