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3976 SAPPHIRE LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath1,879 sqftBuilt 2008

Property at a Glance

This home is estimated between $561,846 and $738,778, with a best estimate of $585,083. 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

$561,846 $738,778
Best Estimate
$585,083
WCAD Value
$597,975
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 $561,846 and $738,778. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3972 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.02 mi 100% similar Same subdivision
4 bed 3 bath 1,216 sqft Built 2010
Raw Value $539,584
Adjusted Value $738,778

Adjusted +$203,189 for 663 sqft more living space and -$3,995 for being older. Net adjustment: +$199,194.

3980 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.02 mi 100% similar Same subdivision
4 bed 3 bath 2,189 sqft Built 2007
Raw Value $654,854
Adjusted Value $561,846

Adjusted -$95,005 for 310 sqft less living space and +$1,997 for being newer. Net adjustment: -$93,008.

3968 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.03 mi 100% similar Same subdivision
4 bed 3 bath 1,850 sqft Built 2010
Raw Value $579,247
Adjusted Value $584,140

Adjusted +$8,888 for 29 sqft more living space and -$3,995 for being older. Net adjustment: +$4,893.

3964 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.04 mi 100% similar Same subdivision
4 bed 3 bath 1,934 sqft Built 2007
Raw Value $599,942
Adjusted Value $585,083

Adjusted -$16,856 for 55 sqft less living space and +$1,997 for being newer. Net adjustment: -$14,859.

3992 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.04 mi 100% similar Same subdivision
4 bed 3 bath 1,695 sqft Built 2007
Raw Value $613,550
Adjusted Value $671,937

Adjusted +$56,390 for 184 sqft more living space and +$1,997 for being newer. Net adjustment: +$58,387.

The Neighborhood

This home is valued 4.1% below the L495414C - BORHO/MAYFIELD RANCH/SAPPHIRE LOOP median of $623,673. That positions it competitively for buyers comparing within the neighborhood. 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
$597,975
Median
$623,673

This home is -4.1% below the subdivision median.

Tax Analysis

The estimated annual property tax is $11,918 across all districts. With a homestead exemption claimed, that drops to $10,286 — saving $1,632 per year. That's $857 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%$6,499
Round RockCity0.3720%$2,224
Williamson CountyCounty0.3694%$2,209
Austin Community Collegespecial0.1034%$618
Williamson County FM/RdCounty0.0443%$265
Upper Brushy Creek WCIDWater0.0170%$102
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$11,918

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $585,083 would pay approximately $3,652 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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