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3600 COBALT CV, ROUND ROCK, TX 78681

ROUND ROCK, 78681 — williamson County

4 bed3 bath1,980 sqftBuilt 2003

Property at a Glance

This home is estimated between $272,667 and $598,657, with a best estimate of $414,978. That places the property below the L498506D - VILLAGE AT MAYFIELD median of $510,992, in a neighborhood that declined 5.8% over the past year.

Estimated Value Range

$272,667 $598,657
Best Estimate
$414,978
WCAD Value
$594,530
High Confidence

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

Based on 5 comparable properties in L498506D - VILLAGE AT MAYFIELD, this home's estimated market value is between $272,667 and $598,657. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3601 COBALT CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,835 sqft Built 2003
Raw Value $389,272
Adjusted Value $429,696

Adjusted +$40,424 for 145 sqft more living space. Net adjustment: +$40,424.

3605 COBALT CV, ROUND ROCK, TX 78681
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,013 sqft Built 2003
Raw Value $424,178
Adjusted Value $414,978

Adjusted -$9,200 for 33 sqft less living space. Net adjustment: -$9,200.

3814 SEBASTIAN CV, ROUND ROCK, TX 78681
0.08 mi 100% similar Same subdivision
4 bed 3 bath 3,263 sqft Built 2005
Raw Value $630,894
Adjusted Value $272,667

Adjusted -$357,686 for 1,283 sqft less living space and -$541 for being older. Net adjustment: -$358,227.

3815 SEBASTIAN CV, ROUND ROCK, TX 78681
0.08 mi 100% similar Same subdivision
3 bed 2,451 sqft Built 2004
Raw Value $468,154
Adjusted Value $336,573

Adjusted -$131,310 for 471 sqft less living space and -$271 for being older. Net adjustment: -$131,581.

3810 SEBASTIAN CV, ROUND ROCK, TX 78681
0.08 mi 100% similar Same subdivision
3 bed 2 bath 2,148 sqft Built 2006
Raw Value $646,306
Adjusted Value $598,657

Adjusted -$46,837 for 168 sqft less living space and -$812 for being older. Net adjustment: -$47,649.

The Neighborhood

This home is valued 16.3% above the L498506D - VILLAGE AT MAYFIELD median of $510,992. With 696 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 5.8% over the past year.

L498506D - VILLAGE AT MAYFIELD

above average
696 Properties
$510,992 Median Value
-5.8% YoY Change
1% Have Pool
100% Have Garage
This Home
$594,530
Median
$510,992

This home is +16.3% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,697 across all districts. With a homestead exemption claimed, that drops to $9,337 — saving $1,360 per year. That's $778 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
Round Rock ISDSchool0.8931%$5,310
Round RockCity0.3720%$2,212
Williamson CountyCounty0.3694%$2,196
Austin Community Collegespecial0.1034%$615
Williamson County FM/RdCounty0.0443%$264
Upper Brushy Creek WCIDWater0.0170%$101
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$10,697

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $414,978 would pay approximately $2,590 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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