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3836 SAPPHIRE LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,367 sqftBuilt 2008

Property at a Glance

This home is estimated between $447,683 and $792,617, with a best estimate of $555,961. That places the property below 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

$447,683 $792,617
Best Estimate
$555,961
WCAD Value
$751,110
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 $447,683 and $792,617. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3912 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,521 sqft Built 2008
Raw Value $603,157
Adjusted Value $555,961

Adjusted -$47,196 for 154 sqft less living space. Net adjustment: -$47,196.

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 $682,517

Adjusted +$49,648 for 162 sqft more living space and -$5,992 for being older. Net adjustment: +$43,656.

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 $792,617

Adjusted +$111,554 for 364 sqft more living space and -$5,992 for being older. Net adjustment: +$105,562.

3929 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,517 sqft Built 2007
Raw Value $491,656
Adjusted Value $447,683

Adjusted -$45,970 for 150 sqft less living space and +$1,997 for being newer. Net adjustment: -$43,973.

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 $452,513

Adjusted -$39,534 for 129 sqft less living space and -$5,992 for being older. Net adjustment: -$45,526.

The Neighborhood

This home is valued 20.4% 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
$751,110
Median
$623,673

This home is +20.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,970 across all districts. With a homestead exemption claimed, that drops to $13,310 — saving $1,660 per year. That's $1,109 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%$8,164
Round RockCity0.3720%$2,794
Williamson CountyCounty0.3694%$2,775
Austin Community Collegespecial0.1034%$777
Williamson County FM/RdCounty0.0443%$333
Upper Brushy Creek WCIDWater0.0170%$128
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$14,970

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $555,961 would pay approximately $3,470 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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