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800 E MAIN ST, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

4 bed1,121 sqftBuilt 1907

Property at a Glance

This home is estimated between $175,582 and $563,571, with a best estimate of $417,900. That places the property above the R703T14G - Round Rock Historical median of $404,269, in a neighborhood that appreciated 33.1% over the past year.

Estimated Value Range

$175,582 $563,571
Best Estimate
$417,900
WCAD Value
$569,339
High Confidence

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

Based on 5 comparable properties in R703T14G - Round Rock Historical, this home's estimated market value is between $175,582 and $563,571. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

606 MAIN AVE E, ROUND ROCK, TX 78664
0.00 mi 96% similar Same subdivision
2 bed 1 bath 1,130 sqft Built 1920
Raw Value $330,145
Adjusted Value $403,891

Adjusted -$2,836 for 9 sqft less living space and +$76,582 for being newer. Net adjustment: +$73,746.

808 MAIN AVE E, ROUND ROCK, TX 78664
0.00 mi 89% similar Same subdivision
3 bed 2 bath 1,510 sqft Built 1930
Raw Value $658,171
Adjusted Value $563,571

Adjusted -$122,565 for 389 sqft less living space and +$135,491 for being newer and -$107,526 for no garage. Net adjustment: -$94,600.

507 MAIN AVE E, ROUND ROCK, TX 78664
0.00 mi 84% similar Same subdivision
4 bed 3 bath 2,735 sqft Built 1920
Raw Value $607,535
Adjusted Value $175,582

Adjusted -$508,535 for 1,614 sqft less living space and +$76,582 for being newer. Net adjustment: -$431,953.

702 MAIN AVE E, ROUND ROCK, TX 78664
0.00 mi 84% similar Same subdivision
3 bed 2 bath 1,818 sqft Built 1920
Raw Value $687,027
Adjusted Value $544,000

Adjusted -$219,609 for 697 sqft less living space and +$76,582 for being newer. Net adjustment: -$143,027.

402 MAIN AVE E, ROUND ROCK, TX 78664
0.00 mi 84% similar Same subdivision
2 bed 1 bath 1,280 sqft Built 1930
Raw Value $332,506
Adjusted Value $417,900

Adjusted -$50,097 for 159 sqft less living space and +$135,491 for being newer. Net adjustment: +$85,394.

The Neighborhood

This home is valued 40.8% above the R703T14G - Round Rock Historical median of $404,269. With 59 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 33.1% over the past year.

R703T14G - Round Rock Historical

above average
59 Properties
$404,269 Median Value
+33.1% YoY Change
9% Have Pool
14% Have Garage
This Home
$569,339
Median
$404,269

This home is +40.8% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,244 across all districts. With a homestead exemption claimed, that drops to $8,888 — saving $1,356 per year. That's $741 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%$5,085
Round RockCity0.3720%$2,118
Williamson CountyCounty0.3694%$2,103
Austin Community Collegespecial0.1034%$589
Williamson County FM/RdCounty0.0443%$252
Upper Brushy Creek WCIDWater0.0170%$97
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,244

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $417,900 would pay approximately $2,609 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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