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3917 SAPPHIRE LOOP, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath2,205 sqftBuilt 2011

Property at a Glance

This home is estimated between $346,540 and $748,962, with a best estimate of $408,857. 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

$346,540 $748,962
Best Estimate
$408,857
WCAD Value
$638,861
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 $346,540 and $748,962. 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 $512,305

Adjusted -$96,844 for 316 sqft less living space and +$5,992 for being newer. Net adjustment: -$90,852.

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 $748,962

Adjusted +$61,907 for 202 sqft more living space. Net adjustment: +$61,907.

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 $404,028

Adjusted -$95,618 for 312 sqft less living space and +$7,990 for being newer. Net adjustment: -$87,628.

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 $408,857

Adjusted -$89,182 for 291 sqft less living space. Net adjustment: -$89,182.

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 $346,540

Adjusted -$307,388 for 1,003 sqft less living space and +$5,992 for being newer. Net adjustment: -$301,396.

The Neighborhood

This home is valued 2.4% 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

typical
427 Properties
$623,673 Median Value
-8.0% YoY Change
1% Have Pool
100% Have Garage
This Home
$638,861
Median
$623,673

This home is +2.4% above the subdivision median.

Tax Analysis

The estimated annual property tax is $12,733 across all districts. With a homestead exemption claimed, that drops to $11,093 — saving $1,640 per year. That's $924 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%$6,944
Round RockCity0.3720%$2,377
Williamson CountyCounty0.3694%$2,360
Austin Community Collegespecial0.1034%$661
Williamson County FM/RdCounty0.0443%$283
Upper Brushy Creek WCIDWater0.0170%$109
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$12,733

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $408,857 would pay approximately $2,552 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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