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

3824 SAPPHIRE CT, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

5 bed4 bath2,445 sqftBuilt 2008

Property at a Glance

This home is estimated between $735,307 and $771,436, with a best estimate of $758,544. 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

$735,307 $771,436
Best Estimate
$758,544
WCAD Value
$740,109
Medium Confidence

Based on 5 comparable properties(4 in the same subdivision)

Based on 5 comparable properties (4 in the same subdivision, 1 nearby), the estimated range is $735,307 and $771,436. More comparables in the same subdivision would strengthen this estimate.

Comparable Properties (5)

3804 SAPPHIRE CT, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
4 bed 3 bath 2,324 sqft Built 2007
Raw Value $705,686
Adjusted Value $744,766

Adjusted +$37,083 for 121 sqft more living space and +$1,997 for being newer. Net adjustment: +$39,080.

5 bed 4 bath 2,313 sqft Built 2005
Raw Value $718,370
Adjusted Value $764,816

Adjusted +$40,454 for 132 sqft more living space and +$5,992 for being newer. Net adjustment: +$46,446.

3976 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.21 mi 100% similar Same subdivision
4 bed 3 bath 1,879 sqft Built 2008
Raw Value $597,975
Adjusted Value $771,436

Adjusted +$173,461 for 566 sqft more living space. Net adjustment: +$173,461.

3980 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.22 mi 100% similar Same subdivision
4 bed 3 bath 2,189 sqft Built 2007
Raw Value $654,854
Adjusted Value $735,307

Adjusted +$78,456 for 256 sqft more living space and +$1,997 for being newer. Net adjustment: +$80,453.

3964 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.23 mi 100% similar Same subdivision
4 bed 3 bath 1,934 sqft Built 2007
Raw Value $599,942
Adjusted Value $758,544

Adjusted +$156,605 for 511 sqft more living space and +$1,997 for being newer. Net adjustment: +$158,602.

The Neighborhood

This home is valued 18.7% 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
$740,109
Median
$623,673

This home is +18.7% above the subdivision median.

Tax Analysis

The estimated annual property tax is $14,751 across all districts. With a homestead exemption claimed, that drops to $13,093 — saving $1,658 per year. That's $1,091 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%$8,044
Round RockCity0.3720%$2,753
Williamson CountyCounty0.3694%$2,734
Austin Community Collegespecial0.1034%$765
Williamson County FM/RdCounty0.0443%$328
Upper Brushy Creek WCIDWater0.0170%$126
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$14,751

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $758,544 would pay approximately $4,735 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.

View full property details