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15405 RR 620, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

3 bed2,600 sqftBuilt 1984

Property at a Glance

This home is estimated between $775,257 and $1,100,378, with a best estimate of $896,609.

Estimated Value Range

$775,257 $1,100,378
Best Estimate
$896,609
WCAD Value
$1,025,801
Low Confidence

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

There are 5 comparable properties within range, but none are in R30PV - Veterinary Hospital-west Round Rock. The estimated range of $775,257 and $1,100,378 should be treated as a rough guide.

Comparable Properties (5)

3 bed 3,480 sqft Built 1984
Raw Value $1,257,871
Adjusted Value $1,045,391

Adjusted -$212,480 for 880 sqft less living space. Net adjustment: -$212,480.

3 bed 2,935 sqft Built 1965
Raw Value $979,418
Adjusted Value $896,609

Adjusted -$80,887 for 335 sqft less living space and -$1,922 for being older. Net adjustment: -$82,809.

3 bed 3,738 sqft Built 1979
Raw Value $1,138,731
Adjusted Value $803,257

Adjusted -$274,775 for 1,138 sqft less living space and -$506 for being older and -$60,193 for no garage. Net adjustment: -$335,474.

RR 620, AUSTIN, TX 78717
0.00 mi 79% similar
3 bed 2,811 sqft Built 1955
Raw Value $1,154,258
Adjusted Value $1,100,378

Adjusted -$50,947 for 211 sqft less living space and -$2,933 for being older. Net adjustment: -$53,880.

4 bed 2 bath 2,000 sqft Built 1984
Raw Value $630,384
Adjusted Value $775,257

Adjusted +$144,873 for 600 sqft more living space. Net adjustment: +$144,873.

The Neighborhood

Subdivision comparison data is not available for this property.

Tax Analysis

The estimated annual property tax is $15,667 across all districts. With a homestead exemption claimed, that drops to $14,227 — saving $1,440 per year. That's $1,186 per month a buyer should budget. The assessed value increased +9.7%. This increase gives a protest opportunity score of 70 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$9,161
Williamson CountyCounty0.3694%$3,790
Austin Community Collegespecial0.1034%$1,061
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$1,026
Williamson County FM/RdCounty0.0443%$455
Upper Brushy Creek WCIDWater0.0170%$174
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5273%$15,667
70 / 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 $896,609 would pay approximately $5,597 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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