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

17850 PARK VALLEY DR, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed2 bath1,257 sqftBuilt 1992

Property at a Glance

This home is estimated between $96,121 and $561,225, with a best estimate of $429,799. That places the property below 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

$96,121 $561,225
Best Estimate
$429,799
WCAD Value
$427,353
Low Confidence

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

There are 5 comparable properties within range, but few are in R270588F - Fern Bluff Sec 1,1A,1B,2,2 (AMD). The estimated range of $96,121 and $561,225 should be treated as a rough guide.

Comparable Properties (5)

4 bed 2 bath 1,276 sqft Built 1979
Raw Value $412,181
Adjusted Value $429,799

Adjusted -$7,600 for 19 sqft less living space and +$25,218 for being newer. Net adjustment: +$17,618.

17847 PARK VALLEY DR, ROUND ROCK, TX 78681
0.00 mi 97% similar Same subdivision
3 bed 2 bath 2,082 sqft Built 1992
Raw Value $426,113
Adjusted Value $96,121

Adjusted -$329,992 for 825 sqft less living space. Net adjustment: -$329,992.

4 bed 2 bath 1,134 sqft Built 1979
Raw Value $451,921
Adjusted Value $526,338

Adjusted +$49,199 for 123 sqft more living space and +$25,218 for being newer. Net adjustment: +$74,417.

3 bed 2 bath 1,149 sqft Built 1999
Raw Value $531,605
Adjusted Value $561,225

Adjusted +$43,199 for 108 sqft more living space and -$13,579 for being older. Net adjustment: +$29,620.

3 bed 2 bath 1,625 sqft Built 1984
Raw Value $388,330
Adjusted Value $316,845

Adjusted -$147,197 for 368 sqft less living space and +$15,519 for being newer and +$60,193 for having a garage. Net adjustment: -$71,485.

The Neighborhood

This home is valued 5.8% 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
$427,353
Median
$453,749

This home is -5.8% below the subdivision median.

Tax Analysis

The estimated annual property tax is $7,296 across all districts. With a homestead exemption claimed, that drops to $5,967 — saving $1,329 per year. That's $497 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%$3,817
Williamson CountyCounty0.3694%$1,579
Fern Bluff MUDMUD0.1800%$769
Austin Community Collegespecial0.1034%$442
Williamson County ESD #2 - Sam Bass VFDESD0.1000%$427
Williamson County FM/RdCounty0.0443%$189
Upper Brushy Creek WCIDWater0.0170%$73
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7073%$7,296

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $429,799 would pay approximately $2,683 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