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517 KOLBO DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed2 bath2,025 sqftBuilt 2017

Property at a Glance

This home is estimated between $386,987 and $775,212, with a best estimate of $542,774. 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

$386,987 $775,212
Best Estimate
$542,774
WCAD Value
$611,379
Low Confidence

Based on 5 comparable properties(1 in the same subdivision)

There are 5 comparable properties within range, but few are in R500515C - FOREST GROVE. The estimated range of $386,987 and $775,212 should be treated as a rough guide.

Comparable Properties (5)

4 bed 2 bath 1,819 sqft Built 2015
Raw Value $481,016
Adjusted Value $542,774

Adjusted +$54,715 for 206 sqft more living space and +$7,043 for being newer. Net adjustment: +$61,758.

511 TRAILSIDE BND, ROUND ROCK, TX 78665
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,253 sqft Built 2017
Raw Value $835,770
Adjusted Value $775,212

Adjusted -$60,558 for 228 sqft less living space. Net adjustment: -$60,558.

4 bed 3 bath 1,975 sqft Built 2018
Raw Value $377,228
Adjusted Value $386,987

Adjusted +$13,280 for 50 sqft more living space and -$3,521 for being older. Net adjustment: +$9,759.

4 bed 1,707 sqft Built 2018
Raw Value $362,864
Adjusted Value $443,805

Adjusted +$84,462 for 318 sqft more living space and -$3,521 for being older. Net adjustment: +$80,941.

4 bed 2 bath 1,639 sqft Built 2018
Raw Value $452,285
Adjusted Value $551,287

Adjusted +$102,523 for 386 sqft more living space and -$3,521 for being older. Net adjustment: +$99,002.

The Neighborhood

This home is valued 10.9% 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
$611,379
Median
$686,297

This home is -10.9% below the subdivision median.

Tax Analysis

The estimated annual property tax is $11,000 across all districts. With a homestead exemption claimed, that drops to $9,637 — saving $1,363 per year. That's $803 per month a buyer should budget. The assessed value increased +4.2% vs the subdivision average of -2.9%. This above-average increase gives a protest opportunity score of 36 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$5,460
Round RockCity0.3720%$2,274
Williamson CountyCounty0.3694%$2,259
Austin Community Collegespecial0.1034%$632
Williamson County FM/RdCounty0.0443%$271
Upper Brushy Creek WCIDWater0.0170%$104
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$11,000
36 / 100

Some opportunity.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $542,774 would pay approximately $3,388 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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