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15509 RR 620 N, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

3 bed3,738 sqftBuilt 1979

Property at a Glance

This home is estimated between $703,777 and $1,435,852, with a best estimate of $1,361,275. That places the property above the R30PR - Single Family Conversion-west Round Rock median of $945,717, in a neighborhood that appreciated 6.7% over the past year.

Estimated Value Range

$703,777 $1,435,852
Best Estimate
$1,361,275
WCAD Value
$1,138,731
Low Confidence

Based on 5 comparable properties(2 in the same subdivision)

There are 5 comparable properties within range, but few are in R30PR - Single Family Conversion-west Round Rock. The estimated range of $703,777 and $1,435,852 should be treated as a rough guide.

Comparable Properties (5)

3 bed 3,480 sqft Built 1984
Raw Value $1,257,871
Adjusted Value $1,380,865

Adjusted +$62,295 for 258 sqft more living space and +$506 for being newer and +$60,193 for having a garage. Net adjustment: +$122,994.

15605 RR 620 N, AUSTIN, TX 78717
0.00 mi 94% similar Same subdivision
3 bed 2,935 sqft Built 1965
Raw Value $979,418
Adjusted Value $1,232,083

Adjusted +$193,888 for 803 sqft more living space and -$1,416 for being older and +$60,193 for having a garage. Net adjustment: +$252,665.

RR 620, AUSTIN, TX 78717
0.00 mi 93% similar Same subdivision
3 bed 2,811 sqft Built 1955
Raw Value $1,154,258
Adjusted Value $1,435,852

Adjusted +$223,828 for 927 sqft more living space and -$2,427 for being older and +$60,193 for having a garage. Net adjustment: +$281,594.

15405 RR 620, AUSTIN, TX 78717
0.00 mi 81% similar
3 bed 2,600 sqft Built 1984
Raw Value $1,025,801
Adjusted Value $1,361,275

Adjusted +$274,775 for 1,138 sqft more living space and +$506 for being newer and +$60,193 for having a garage. Net adjustment: +$335,474.

15615 RM 620, AUSTIN, TX 78717
0.00 mi 75% similar
3 bed 2 bath 3,280 sqft Built 1964
Raw Value $534,515
Adjusted Value $703,777

Adjusted +$110,586 for 458 sqft more living space and -$1,517 for being older and +$60,193 for having a garage. Net adjustment: +$169,262.

The Neighborhood

This home is valued 20.4% above the R30PR - Single Family Conversion-west Round Rock median of $945,717. With 9 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 6.7% over the past year.

R30PR - Single Family Conversion-west Round Rock

above average
9 Properties
$945,717 Median Value
+6.7% YoY Change
0% Have Pool
33% Have Garage
This Home
$1,138,731
Median
$945,717

This home is +20.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $17,392 across all districts. With a homestead exemption claimed, that drops to $15,931 — saving $1,461 per year. That's $1,328 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%$10,170
Williamson CountyCounty0.3694%$4,207
Austin Community Collegespecial0.1034%$1,177
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$1,139
Williamson County FM/RdCounty0.0443%$505
Upper Brushy Creek WCIDWater0.0170%$194
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5273%$17,392

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $1,361,275 would pay approximately $8,497 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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