Beta Williamson County, TX only — data and coverage are limited during early access.

12021 SWALLOW DR, AUSTIN, TX 78750

AUSTIN, 78750 — williamson County

3 bed2 bath1,576 sqftBuilt 1977

Property at a Glance

This home is estimated between $372,308 and $393,162, with a best estimate of $387,264. That places the property below the R353476G - Anderson Mill median of $407,368, in a neighborhood that appreciated 0.2% over the past year.

Estimated Value Range

$372,308 $393,162
Best Estimate
$387,264
WCAD Value
$370,711
High Confidence

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

Based on 5 comparable properties in R353476G - Anderson Mill, this home's estimated market value is between $372,308 and $393,162. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

12019 SWALLOW DR, AUSTIN, TX 78750
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,551 sqft Built 1977
Raw Value $366,101
Adjusted Value $372,308

Adjusted +$6,207 for 25 sqft more living space. Net adjustment: +$6,207.

12101 SWALLOW DR, AUSTIN, TX 78750
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,492 sqft Built 1977
Raw Value $372,307
Adjusted Value $393,162

Adjusted +$20,855 for 84 sqft more living space. Net adjustment: +$20,855.

12017 SWALLOW DR, AUSTIN, TX 78750
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,438 sqft Built 1977
Raw Value $357,643
Adjusted Value $391,905

Adjusted +$34,262 for 138 sqft more living space. Net adjustment: +$34,262.

12103 SWALLOW DR, AUSTIN, TX 78750
0.03 mi 100% similar Same subdivision
2 bed 2 bath 1,576 sqft Built 1977
Raw Value $384,178
Adjusted Value $384,178

This comparable closely matches the subject property's features.

12020 SWALLOW DR, AUSTIN, TX 78750
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,464 sqft Built 1977
Raw Value $359,457
Adjusted Value $387,264

Adjusted +$27,807 for 112 sqft more living space. Net adjustment: +$27,807.

The Neighborhood

This home is valued 9.0% below the R353476G - Anderson Mill median of $407,368. That positions it competitively for buyers comparing within the neighborhood. The neighborhood appreciated 0.2% over the past year.

R353476G - Anderson Mill

typical
1,663 Properties
$407,368 Median Value
+0.2% YoY Change
3% Have Pool
95% Have Garage
This Home
$370,711
Median
$407,368

This home is -9.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $7,695 across all districts. With a homestead exemption claimed, that drops to $5,987 — saving $1,708 per year. That's $499 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%$3,311
AustinCity0.5240%$1,943
Williamson CountyCounty0.3694%$1,370
Anderson Mill Limited Districtspecial0.1243%$461
Austin Community Collegespecial0.1034%$383
Williamson County FM/RdCounty0.0443%$164
Upper Brushy Creek WCIDWater0.0170%$63
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax2.0756%$7,695

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $387,264 would pay approximately $2,417 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.

View full property details