8306 HILLROCK DR, ROUND ROCK, TX 78681
ROUND ROCK, 78681 — williamson County
Property at a Glance
This home is estimated between $455,338 and $638,804, with a best estimate of $473,883. That places the property above the R222592G - CAT HOLLOW ALL SECTIONS R4 median of $451,685, in a neighborhood that declined 6.9% over the past year.
Estimated Value Range
$473,883
$438,178
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 $455,338 and $638,804. More comparables in the same subdivision would strengthen this estimate.
Comparable Properties (5)
Adjusted +$139,558 for 517 sqft more living space and -$37,328 for being older. Net adjustment: +$102,230.
Adjusted +$19,975 for 74 sqft more living space and +$22,397 for being newer. Net adjustment: +$42,372.
Adjusted +$171,410 for 635 sqft more living space and +$7,466 for being newer. Net adjustment: +$178,876.
Adjusted +$36,442 for 135 sqft more living space and +$29,862 for being newer. Net adjustment: +$66,304.
Adjusted +$70,724 for 262 sqft more living space. Net adjustment: +$70,724.
The Neighborhood
This home is valued 3.0% below the R222592G - CAT HOLLOW ALL SECTIONS R4 median of $451,685. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 6.9% over the past year.
R222592G - CAT HOLLOW ALL SECTIONS R4
typicalThis home is -3.0% below the subdivision median.
Tax Analysis
The estimated annual property tax is $8,387 across all districts. With a homestead exemption claimed, that drops to $7,056 — saving $1,331 per year. That's $588 per month a buyer should budget. The assessed value increased -0.7% vs the subdivision average of -6.9%. This above-average increase gives a protest opportunity score of 31 out of 100 — it may be worth challenging the appraisal.
Tax Districts
| District | Type | Rate | Annual Amount |
|---|---|---|---|
| Round Rock ISD | School | 0.8931% | $3,913 |
| Brushy Creek MUD | MUD | 0.3868% | $1,695 |
| Williamson County | County | 0.3694% | $1,619 |
| Austin Community College | special | 0.1034% | $453 |
| Williamson County ESD #2 - Sam Bass VFD | ESD | 0.1000% | $438 |
| Williamson County FM/Rd | County | 0.0443% | $194 |
| Upper Brushy Creek WCID | Water | 0.0170% | $74 |
| Williamson Central Appraisal District | cad | 0.0000% | $0 |
| Total Annual Tax | 1.9141% | $8,387 | |
Mortgage Context
At today's 30-year mortgage rate of 6.38%, a buyer financing $473,883 would pay approximately $2,958 per month (principal and interest only, excluding taxes and insurance).