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8509 COLUMBIA FALLS DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath1,894 sqftBuilt 1988

Property at a Glance

This home is estimated between $411,439 and $841,729, with a best estimate of $749,313. That places the property above the R270588F - Fern Bluff Sec 1,1A,1B,2,2 (AMD) median of $453,749, in a neighborhood that declined 4.0% over the past year.

Estimated Value Range

$411,439 $841,729
Best Estimate
$749,313
WCAD Value
$394,761
High Confidence

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

Based on 5 comparable properties in R270588F - Fern Bluff Sec 1,1A,1B,2,2 (AMD), this home's estimated market value is between $411,439 and $841,729. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

8513 COLUMBIA FALLS DR, ROUND ROCK, TX 78681
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,114 sqft Built 1987
Raw Value $527,796
Adjusted Value $841,729

Adjusted +$311,993 for 780 sqft more living space and +$1,940 for being newer. Net adjustment: +$313,933.

8510 COLUMBIA FALLS DR, ROUND ROCK, TX 78681
0.03 mi 100% similar Same subdivision
3 bed 2 bath 1,846 sqft Built 1990
Raw Value $398,844
Adjusted Value $411,439

Adjusted +$19,200 for 48 sqft more living space and -$3,880 for being older and -$2,725 for no pool. Net adjustment: +$12,595.

17602 COLUMBIA FALLS CV, ROUND ROCK, TX 78681
0.04 mi 100% similar Same subdivision
4 bed 2 bath 1,404 sqft Built 1988
Raw Value $535,457
Adjusted Value $728,727

Adjusted +$195,995 for 490 sqft more living space and -$2,725 for no pool. Net adjustment: +$193,270.

8503 COLUMBIA FALLS DR, ROUND ROCK, TX 78681
0.03 mi 100% similar Same subdivision
4 bed 2 bath 1,120 sqft Built 1987
Raw Value $479,946
Adjusted Value $791,479

Adjusted +$309,593 for 774 sqft more living space and +$1,940 for being newer. Net adjustment: +$311,533.

17530 KLAMATH FALLS DR, ROUND ROCK, TX 78681
0.04 mi 100% similar Same subdivision
4 bed 2 bath 1,404 sqft Built 1987
Raw Value $551,378
Adjusted Value $749,313

Adjusted +$195,995 for 490 sqft more living space and +$1,940 for being newer. Net adjustment: +$197,935.

The Neighborhood

This home is valued 13.0% below the R270588F - Fern Bluff Sec 1,1A,1B,2,2 (AMD) median of $453,749. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 4.0% over the past year.

R270588F - Fern Bluff Sec 1,1A,1B,2,2 (AMD)

typical
421 Properties
$453,749 Median Value
-4.0% YoY Change
1% Have Pool
100% Have Garage
This Home
$394,761
Median
$453,749

This home is -13.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $6,740 across all districts. With a homestead exemption claimed, that drops to $5,416 — saving $1,324 per year. That's $451 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%$3,526
Williamson CountyCounty0.3694%$1,458
Fern Bluff MUDMUD0.1800%$711
Austin Community Collegespecial0.1034%$408
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$395
Williamson County FM/RdCounty0.0443%$175
Upper Brushy Creek WCIDWater0.0170%$67
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7073%$6,740

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $749,313 would pay approximately $4,677 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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