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

3803 SAPPHIRE CT, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath1,667 sqftBuilt 2010

Property at a Glance

This home is estimated between $510,328 and $677,801, with a best estimate of $571,947. 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

$510,328 $677,801
Best Estimate
$571,947
WCAD Value
$593,453
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 $510,328 and $677,801. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3804 SAPPHIRE CT, ROUND ROCK, TX 78681
0.01 mi 100% similar Same subdivision
4 bed 3 bath 2,324 sqft Built 2007
Raw Value $705,686
Adjusted Value $510,328

Adjusted -$201,350 for 657 sqft less living space and +$5,992 for being newer. Net adjustment: -$195,358.

4008 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.12 mi 100% similar Same subdivision
4 bed 2 bath 1,880 sqft Built 2009
Raw Value $635,228
Adjusted Value $571,947

Adjusted -$65,278 for 213 sqft less living space and +$1,997 for being newer. Net adjustment: -$63,281.

3992 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.17 mi 100% similar Same subdivision
4 bed 3 bath 1,695 sqft Built 2007
Raw Value $613,550
Adjusted Value $610,961

Adjusted -$8,581 for 28 sqft less living space and +$5,992 for being newer. Net adjustment: -$2,589.

3976 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.20 mi 100% similar Same subdivision
4 bed 3 bath 1,879 sqft Built 2008
Raw Value $597,975
Adjusted Value $536,999

Adjusted -$64,971 for 212 sqft less living space and +$3,995 for being newer. Net adjustment: -$60,976.

3972 SAPPHIRE LOOP, ROUND ROCK, TX 78681
0.21 mi 100% similar Same subdivision
4 bed 3 bath 1,216 sqft Built 2010
Raw Value $539,584
Adjusted Value $677,801

Adjusted +$138,217 for 451 sqft more living space. Net adjustment: +$138,217.

The Neighborhood

This home is valued 4.8% 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
$593,453
Median
$623,673

This home is -4.8% below the subdivision median.

Tax Analysis

The estimated annual property tax is $11,828 across all districts. With a homestead exemption claimed, that drops to $10,197 — saving $1,631 per year. That's $850 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%$6,450
Round RockCity0.3720%$2,208
Williamson CountyCounty0.3694%$2,192
Austin Community Collegespecial0.1034%$614
Williamson County FM/RdCounty0.0443%$263
Upper Brushy Creek WCIDWater0.0170%$101
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9931%$11,828

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $571,947 would pay approximately $3,570 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