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

3844 SAPPHIRE LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed3 bath2,219 sqftBuilt 2007

Property at a Glance

This home is estimated between $342,842 and $745,262, with a best estimate of $635,162. That places the property above the L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP median of $623,673, in a neighborhood that declined 8.0% over the past year.

Estimated Value Range

$342,842 $745,262
Best Estimate
$635,162
WCAD Value
$623,673
High Confidence

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

Based on 5 comparable properties in L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP, this home's estimated market value is between $342,842 and $745,262. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3917 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,205 sqft Built 2011
Raw Value $638,861
Adjusted Value $635,162

Adjusted +$4,291 for 14 sqft more living space and -$7,990 for being older. Net adjustment: -$3,699.

4009 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,003 sqft Built 2011
Raw Value $687,055
Adjusted Value $745,262

Adjusted +$66,197 for 216 sqft more living space and -$7,990 for being older. Net adjustment: +$58,207.

3920 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,496 sqft Built 2011
Raw Value $498,039
Adjusted Value $405,157

Adjusted -$84,892 for 277 sqft less living space and -$7,990 for being older. Net adjustment: -$92,882.

4112 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 3,208 sqft Built 2008
Raw Value $647,936
Adjusted Value $342,842

Adjusted -$303,097 for 989 sqft less living space and -$1,997 for being older. Net adjustment: -$305,094.

4013 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 1,997 sqft Built 2011
Raw Value $636,693
Adjusted Value $696,739

Adjusted +$68,036 for 222 sqft more living space and -$7,990 for being older. Net adjustment: +$60,046.

The Neighborhood

This home is in line with the L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP median of $623,673. Note that values in this subdivision declined 8.0% over the past year.

L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP

typical
427 Properties
$623,673 Median Value
-8.0% YoY Change
1% Have Pool
100% Have Garage
This Home
$623,673
Median
$623,673

This home is +0.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,430 across all districts. With a homestead exemption claimed, that drops to $10,793 — saving $1,637 per year. That's $899 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
Leander ISDSchool1.0869%$6,779
Round RockCity0.3720%$2,320
Williamson CountyCounty0.3694%$2,304
Austin Community Collegespecial0.1034%$645
Williamson County FM/RdCounty0.0443%$276
Upper Brushy Creek WCIDWater0.0170%$106
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$12,430

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $635,162 would pay approximately $3,965 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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