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1000 IH 35 S, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

3 bed65,287 sqftBuilt 1970

Property at a Glance

This home is estimated between $11,225,810 and $61,684,338, with a best estimate of $11,794,673. That places the property above the R30IS - Storage Warehouse-west Round Rock median of $1,125,302, in a neighborhood that appreciated 11.8% over the past year.

Estimated Value Range

$11,225,810 $61,684,338
Best Estimate
$11,794,673
WCAD Value
$27,019,362
Low Confidence

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

There are 5 comparable properties within range, but few are in R30IS - Storage Warehouse-west Round Rock. The estimated range of $11,225,810 and $61,684,338 should be treated as a rough guide.

Comparable Properties (5)

3 bed 43,649 sqft Built 1975
Raw Value $58,048,722
Adjusted Value $61,684,338

Adjusted +$3,635,616 for 21,638 sqft more living space. Net adjustment: +$3,635,616.

2700 CR 172, ROUND ROCK, TX 78681
0.05 mi 46% similar Same subdivision
3 bed 12,521 sqft Built 2020
Raw Value $5,326,604
Adjusted Value $14,192,346

Adjusted +$8,865,742 for 52,766 sqft more living space. Net adjustment: +$8,865,742.

3 bed 3,888 sqft Built 1958
Raw Value $1,036,720
Adjusted Value $11,352,979

Adjusted +$10,316,259 for 61,399 sqft more living space. Net adjustment: +$10,316,259.

3 bed 2,790 sqft Built 1979
Raw Value $785,258
Adjusted Value $11,225,810

Adjusted +$10,500,745 for 62,497 sqft more living space and -$60,193 for no garage. Net adjustment: +$10,440,552.

3 bed 1,800 sqft Built 1979
Raw Value $1,127,589
Adjusted Value $11,794,673

Adjusted +$10,667,084 for 63,487 sqft more living space. Net adjustment: +$10,667,084.

The Neighborhood

This home is valued 2301.1% above the R30IS - Storage Warehouse-west Round Rock median of $1,125,302. With 11 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 11.8% over the past year.

R30IS - Storage Warehouse-west Round Rock

outlier high
11 Properties
$1,125,302 Median Value
+11.8% YoY Change
0% Have Pool
0% Have Garage
This Home
$27,019,362
Median
$1,125,302

This home is +2301.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $486,153 across all districts. With a homestead exemption claimed, that drops to $479,911 — saving $6,242 per year. That's $39,993 per month a buyer should budget. The assessed value increased +19.1% vs the subdivision average of +11.8%. This above-average increase gives a protest opportunity score of 82 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$241,310
Round RockCity0.3720%$100,512
Williamson CountyCounty0.3694%$99,822
Austin Community Collegespecial0.1034%$27,938
Williamson County FM/RdCounty0.0443%$11,977
Upper Brushy Creek WCIDWater0.0170%$4,593
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$486,153
82 / 100

There may be a strong case to protest this appraisal.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $11,794,673 would pay approximately $73,622 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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