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1000 MAIN AVE E, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed79,489 sqftBuilt 1929

Property at a Glance

This home is estimated between $18,987,440 and $19,062,441, with a best estimate of $19,025,978.

Estimated Value Range

$18,987,440 $19,062,441
Best Estimate
$19,025,978
WCAD Value
$8,705,701
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in R20QV - SKILLED NURSING EAST ROUND ROCK. The estimated range of $18,987,440 and $19,062,441 should be treated as a rough guide.

Comparable Properties (5)

3 bed 2 bath 2,041 sqft Built 1975
Raw Value $357,523
Adjusted Value $19,002,159

Adjusted +$18,700,177 for 77,448 sqft more living space and +$4,652 for being newer and -$60,193 for no garage. Net adjustment: +$18,644,636.

3 bed 1 bath 1,367 sqft Built 1975
Raw Value $255,065
Adjusted Value $19,062,441

Adjusted +$18,862,917 for 78,122 sqft more living space and +$4,652 for being newer and -$60,193 for no garage. Net adjustment: +$18,807,376.

3 bed 2 bath 2,096 sqft Built 1976
Raw Value $362,217
Adjusted Value $18,987,440

Adjusted +$18,686,897 for 77,393 sqft more living space and +$4,754 for being newer and -$6,235 for no pool and -$60,193 for no garage. Net adjustment: +$18,625,223.

3 bed 2 bath 2,208 sqft Built 1978
Raw Value $361,168
Adjusted Value $19,025,978

Adjusted +$18,659,854 for 77,281 sqft more living space and +$4,956 for being newer. Net adjustment: +$18,664,810.

3 bed 2 bath 2,258 sqft Built 2012
Raw Value $452,564
Adjusted Value $19,048,547

Adjusted +$18,647,781 for 77,231 sqft more living space and +$8,395 for being newer and -$60,193 for no garage. Net adjustment: +$18,595,983.

The Neighborhood

Subdivision comparison data is not available for this property.

Tax Analysis

The estimated annual property tax is $156,640 across all districts. With a homestead exemption claimed, that drops to $153,781 — saving $2,859 per year. That's $12,815 per month a buyer should budget. The assessed value increased +6.9%. This increase gives a protest opportunity score of 75 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$77,751
Round RockCity0.3720%$32,385
Williamson CountyCounty0.3694%$32,163
Austin Community Collegespecial0.1034%$9,002
Williamson County FM/RdCounty0.0443%$3,859
Upper Brushy Creek WCIDWater0.0170%$1,480
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$156,640
75 / 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 $19,025,978 would pay approximately $118,760 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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