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3852 SAPPHIRE LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed4 bath2,259 sqftBuilt 2007

Property at a Glance

This home is estimated between $412,587 and $757,521, with a best estimate of $647,420. 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

$412,587 $757,521
Best Estimate
$647,420
WCAD Value
$761,715
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 $412,587 and $757,521. 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 $647,420

Adjusted +$16,549 for 54 sqft more living space and -$7,990 for being older. Net adjustment: +$8,559.

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 $757,521

Adjusted +$78,456 for 256 sqft more living space and -$7,990 for being older. Net adjustment: +$70,466.

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 $417,416

Adjusted -$72,633 for 237 sqft less living space and -$7,990 for being older. Net adjustment: -$80,623.

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 $708,998

Adjusted +$80,295 for 262 sqft more living space and -$7,990 for being older. Net adjustment: +$72,305.

3929 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 98% similar Same subdivision
3 bed 2 bath 2,517 sqft Built 2007
Raw Value $491,656
Adjusted Value $412,587

Adjusted -$79,069 for 258 sqft less living space. Net adjustment: -$79,069.

The Neighborhood

This home is valued 22.1% above the L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP median of $623,673. With 427 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 8.0% over the past year.

L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP

above average
427 Properties
$623,673 Median Value
-8.0% YoY Change
1% Have Pool
100% Have Garage
This Home
$761,715
Median
$623,673

This home is +22.1% above the subdivision median.

Tax Analysis

The estimated annual property tax is $15,182 across all districts. With a homestead exemption claimed, that drops to $13,519 — saving $1,663 per year. That's $1,127 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%$8,279
Round RockCity0.3720%$2,834
Williamson CountyCounty0.3694%$2,814
Austin Community Collegespecial0.1034%$788
Williamson County FM/RdCounty0.0443%$338
Upper Brushy Creek WCIDWater0.0170%$129
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$15,182

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $647,420 would pay approximately $4,041 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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