4000 CR 123, ROUND ROCK, TX 78664
ROUND ROCK, 78664 — williamson County
Property at a Glance
This home is estimated between $348,886 and $583,777, with a best estimate of $404,295. That places the property above the AM20SLXI - MH - SGT/SHU/SRR median of $233,506, in a neighborhood that appreciated 30.5% over the past year.
Estimated Value Range
$404,295
$1,022,061
Based on 5 comparable properties(0 in the same subdivision)
There are 5 comparable properties within range, but none are in AM20SLXI - MH - SGT/SHU/SRR. The estimated range of $348,886 and $583,777 should be treated as a rough guide.
Comparable Properties (5)
Adjusted +$10,478 for 76 sqft more living space and -$2,320 for being older. Net adjustment: +$8,158.
Adjusted +$2,757 for 20 sqft more living space and +$9,281 for being newer. Net adjustment: +$12,038.
Adjusted +$22,473 for 163 sqft more living space and +$27,842 for being newer. Net adjustment: +$50,315.
Adjusted -$57,906 for 420 sqft less living space and +$13,921 for being newer. Net adjustment: -$43,985.
Adjusted +$78,449 for 569 sqft more living space and +$18,562 for being newer. Net adjustment: +$97,011.
The Neighborhood
This home is valued 337.7% above the AM20SLXI - MH - SGT/SHU/SRR median of $233,506. With 471 homes in the subdivision, the property sits in the upper tier. The neighborhood appreciated 30.5% over the past year.
AM20SLXI - MH - SGT/SHU/SRR
outlier highThis home is +337.7% above the subdivision median.
Tax Analysis
The estimated annual property tax is $15,609 across all districts. With a homestead exemption claimed, that drops to $14,170 — saving $1,439 per year. That's $1,181 per month a buyer should budget. The assessed value increased +15.8% vs the subdivision average of +30.5%. This increase gives a protest opportunity score of 45 out of 100 — it may be worth challenging the appraisal.
Tax Districts
| District | Type | Rate | Annual Amount |
|---|---|---|---|
| Round Rock ISD | School | 0.8931% | $9,128 |
| Williamson County | County | 0.3694% | $3,776 |
| Austin Community College | special | 0.1034% | $1,057 |
| Williamson County ESD #9 - Round Rock | ESD | 0.0999% | $1,021 |
| Williamson County FM/Rd | County | 0.0443% | $453 |
| Upper Brushy Creek WCID | Water | 0.0170% | $174 |
| Williamson Central Appraisal District | cad | 0.0000% | $0 |
| Total Annual Tax | 1.5272% | $15,609 | |
Mortgage Context
At today's 30-year mortgage rate of 6.38%, a buyer financing $404,295 would pay approximately $2,524 per month (principal and interest only, excluding taxes and insurance).