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504 RUBIO AVE, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

2 bed1 bath1,050 sqftBuilt 1955

Property at a Glance

This home is estimated between $231,345 and $295,791, with a best estimate of $253,760. That places the property below the R701575F - OLD TOWN ROUND ROCK median of $319,256, in a neighborhood that appreciated 4.3% over the past year.

Estimated Value Range

$231,345 $295,791
Best Estimate
$253,760
WCAD Value
$248,772
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $231,345 and $295,791. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

704 RUBIO AVE, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
2 bed 1 bath 789 sqft Built 1940
Raw Value $157,579
Adjusted Value $270,979

Adjusted +$67,015 for 261 sqft more living space and +$46,385 for being newer. Net adjustment: +$113,400.

2 bed 1 bath 1,080 sqft Built 1950
Raw Value $246,001
Adjusted Value $253,760

Adjusted -$7,703 for 30 sqft less living space and +$15,462 for being newer. Net adjustment: +$7,759.

900 MANDELL ST, ROUND ROCK, TX 78664
0.19 mi 98% similar Same subdivision
2 bed 1 bath 1,112 sqft Built 1940
Raw Value $218,228
Adjusted Value $248,694

Adjusted -$15,919 for 62 sqft less living space and +$46,385 for being newer. Net adjustment: +$30,466.

603 RUBIO AVE, ROUND ROCK, TX 78664
0.00 mi 97% similar Same subdivision
2 bed 1 bath 904 sqft Built 1940
Raw Value $211,919
Adjusted Value $295,791

Adjusted +$37,487 for 146 sqft more living space and +$46,385 for being newer. Net adjustment: +$83,872.

503 RUBIO AVE, ROUND ROCK, TX 78664
0.00 mi 95% similar Same subdivision
3 bed 1 bath 1,292 sqft Built 1940
Raw Value $247,096
Adjusted Value $231,345

Adjusted -$62,136 for 242 sqft less living space and +$46,385 for being newer. Net adjustment: -$15,751.

The Neighborhood

This home is valued 22.1% below the R701575F - OLD TOWN ROUND ROCK median of $319,256. That positions it competitively for buyers comparing within the neighborhood. The neighborhood appreciated 4.3% over the past year.

R701575F - OLD TOWN ROUND ROCK

below average
360 Properties
$319,256 Median Value
+4.3% YoY Change
5% Have Pool
24% Have Garage
This Home
$248,772
Median
$319,256

This home is -22.1% below the subdivision median.

Tax Analysis

The estimated annual property tax is $3,529 across all districts. With a homestead exemption claimed, that drops to $2,243 — saving $1,286 per year. That's $187 per month a buyer should budget. The assessed value increased +52.2% vs the subdivision average of +4.3%. This above-average increase gives a protest opportunity score of 95 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$1,752
Round RockCity0.3720%$730
Williamson CountyCounty0.3694%$725
Austin Community Collegespecial0.1034%$203
Williamson County FM/RdCounty0.0443%$87
Upper Brushy Creek WCIDWater0.0170%$33
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$3,529
95 / 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 $253,760 would pay approximately $1,584 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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