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505 KOLBO DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,221 sqftBuilt 2017

Property at a Glance

This home is estimated between $219,115 and $388,442, with a best estimate of $223,748. That places the property below the R500515C - FOREST GROVE median of $686,297, in a neighborhood that declined 2.9% over the past year.

Estimated Value Range

$219,115 $388,442
Best Estimate
$223,748
WCAD Value
$644,542
Low Confidence

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

There are 5 comparable properties within range, but none are in R500515C - FOREST GROVE. The estimated range of $219,115 and $388,442 should be treated as a rough guide.

Comparable Properties (5)

4 bed 2 bath 1,387 sqft Built 2013
Raw Value $418,446
Adjusted Value $388,442

Adjusted -$44,090 for 166 sqft less living space and +$14,086 for being newer. Net adjustment: -$30,004.

3 bed 2 bath 1,706 sqft Built 2017
Raw Value $347,933
Adjusted Value $219,115

Adjusted -$128,818 for 485 sqft less living space. Net adjustment: -$128,818.

3 bed 2 bath 1,847 sqft Built 2017
Raw Value $413,193
Adjusted Value $246,925

Adjusted -$166,268 for 626 sqft less living space. Net adjustment: -$166,268.

3 bed 2 bath 1,791 sqft Built 2015
Raw Value $368,099
Adjusted Value $223,748

Adjusted -$151,394 for 570 sqft less living space and +$7,043 for being newer. Net adjustment: -$144,351.

3 bed 2 bath 1,801 sqft Built 2015
Raw Value $367,178
Adjusted Value $220,170

Adjusted -$154,051 for 580 sqft less living space and +$7,043 for being newer. Net adjustment: -$147,008.

The Neighborhood

This home is valued 6.1% below the R500515C - FOREST GROVE median of $686,297. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 2.9% over the past year.

R500515C - FOREST GROVE

typical
197 Properties
$686,297 Median Value
-2.9% YoY Change
1% Have Pool
100% Have Garage
This Home
$644,542
Median
$686,297

This home is -6.1% below the subdivision median.

Tax Analysis

The estimated annual property tax is $11,597 across all districts. With a homestead exemption claimed, that drops to $10,228 — saving $1,369 per year. That's $852 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%$5,756
Round RockCity0.3720%$2,398
Williamson CountyCounty0.3694%$2,381
Austin Community Collegespecial0.1034%$666
Williamson County FM/RdCounty0.0443%$286
Upper Brushy Creek WCIDWater0.0170%$110
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$11,597

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $223,748 would pay approximately $1,397 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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