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520 KOLBO DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed3 bath2,738 sqftBuilt 2017

Property at a Glance

This home is estimated between $451,643 and $1,070,803, with a best estimate of $575,311. 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

$451,643 $1,070,803
Best Estimate
$575,311
WCAD Value
$617,568
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 $451,643 and $1,070,803 should be treated as a rough guide.

Comparable Properties (5)

4 bed 3 bath 2,470 sqft Built 2013
Raw Value $828,410
Adjusted Value $913,678

Adjusted +$71,182 for 268 sqft more living space and +$14,086 for being newer. Net adjustment: +$85,268.

4 bed 2 bath 2,740 sqft Built 2018
Raw Value $464,980
Adjusted Value $460,928

Adjusted -$531 for 2 sqft less living space and -$3,521 for being older. Net adjustment: -$4,052.

4 bed 4 bath 2,328 sqft Built 2015
Raw Value $459,370
Adjusted Value $575,311

Adjusted +$108,898 for 410 sqft more living space and +$7,043 for being newer. Net adjustment: +$115,941.

3 bed 2 bath 2,685 sqft Built 2018
Raw Value $441,087
Adjusted Value $451,643

Adjusted +$14,077 for 53 sqft more living space and -$3,521 for being older. Net adjustment: +$10,556.

4 bed 3 bath 2,382 sqft Built 2002
Raw Value $923,426
Adjusted Value $1,070,803

Adjusted +$94,555 for 356 sqft more living space and +$52,822 for being newer. Net adjustment: +$147,377.

The Neighborhood

This home is valued 10.0% 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
$617,568
Median
$686,297

This home is -10.0% below the subdivision median.

Tax Analysis

The estimated annual property tax is $11,112 across all districts. With a homestead exemption claimed, that drops to $9,747 — saving $1,365 per year. That's $812 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%$5,515
Round RockCity0.3720%$2,297
Williamson CountyCounty0.3694%$2,282
Austin Community Collegespecial0.1034%$639
Williamson County FM/RdCounty0.0443%$274
Upper Brushy Creek WCIDWater0.0170%$105
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$11,112

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $575,311 would pay approximately $3,591 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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