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4500 TIFFANY NICOLE, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

5 bed4 bath3,740 sqftBuilt 1920

Property at a Glance

This home is estimated between $616,843 and $828,451, with a best estimate of $648,818. That places the property above the R002D78G - East Round Rock Williamson Co Abstracts lt 20 Acs median of $594,322, in a neighborhood that declined 11.1% over the past year.

Estimated Value Range

$616,843 $828,451
Best Estimate
$648,818
WCAD Value
$1,489,466
Low Confidence

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

There are 5 comparable properties within range, but none are in R002D78G - East Round Rock Williamson Co Abstracts lt 20 Acs. The estimated range of $616,843 and $828,451 should be treated as a rough guide.

Comparable Properties (5)

4 bed 3 bath 2,037 sqft Built 2018
Raw Value $433,126
Adjusted Value $616,843

Adjusted +$560,009 for 1,703 sqft more living space and -$376,292 for being older. Net adjustment: +$183,717.

3 bed 2 bath 2,548 sqft Built 2010
Raw Value $602,418
Adjusted Value $648,818

Adjusted +$391,974 for 1,192 sqft more living space and -$345,574 for being older. Net adjustment: +$46,400.

4 bed 2 bath 2,048 sqft Built 2018
Raw Value $438,310
Adjusted Value $618,410

Adjusted +$556,392 for 1,692 sqft more living space and -$376,292 for being older. Net adjustment: +$180,100.

4 bed 3 bath 1,570 sqft Built 2019
Raw Value $495,007
Adjusted Value $828,451

Adjusted +$713,576 for 2,170 sqft more living space and -$380,132 for being older. Net adjustment: +$333,444.

4 bed 2 bath 1,966 sqft Built 2018
Raw Value $601,523
Adjusted Value $808,588

Adjusted +$583,357 for 1,774 sqft more living space and -$376,292 for being older. Net adjustment: +$207,065.

The Neighborhood

This home is valued 150.6% above the R002D78G - East Round Rock Williamson Co Abstracts lt 20 Acs median of $594,322. With 82 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 11.1% over the past year.

R002D78G - East Round Rock Williamson Co Abstracts lt 20 Acs

outlier high
82 Properties
$594,322 Median Value
-11.1% YoY Change
1% Have Pool
43% Have Garage
This Home
$1,489,466
Median
$594,322

This home is +150.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $15,059 across all districts. With a homestead exemption claimed, that drops to $13,626 — saving $1,433 per year. That's $1,136 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%$8,806
Williamson CountyCounty0.3694%$3,643
Austin Community Collegespecial0.1034%$1,020
Williamson County ESD #9 - Round RockESD0.0999%$985
Williamson County FM/RdCounty0.0443%$437
Upper Brushy Creek WCIDWater0.0170%$168
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$15,059

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $648,818 would pay approximately $4,050 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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