Williamson County property record for 3604 Cornerstone St, Round Rock, TX 78681
| Property Type | Single Family Home |
|---|---|
| Details | 2 ba · 1,217 sqft · built 1982 |
| Lot Size | 0.188 acres (8,190 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $152,200 (Dec 2010) |
| Tax Bill | $4,947 (2025) |
| Deeds & Mortgages | Feb 2022 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | R-16-3466-0013-0030 |
| Primary APN | R-16-3466-0013-0030 |
|---|---|
| Alternative APNs |
|
| Full Baths | 2 Baths |
|---|---|
| Stories | 1 Story |
| Building Area | 1,217 sqft Living Area |
| 1st Floor Area | 1,217 sqft |
| Flooring | Carpet |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1982 |
|---|---|
| Effective Year Built | Effective 1992 |
| Exterior Material | Stone |
| Roof Type | Gable |
| Lot Area | 8,190 sqft (0.188 acres) |
| Garage Area | 456 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
| Porch Area | 48 sqft |
| Patio Area | 100 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Gas |
| Sewer | Connected |
| Account Number | R16346600130030 |
|---|---|
| Street Address | 3604 CORNERSTONE ST |
| City | ROUND ROCK |
| State | TX |
| Zip | 78681-3709 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | S3261 - BRUSHY CREEK SEC 2, BLOCK 13, LOT 30 |
| Legal Subdivision | BRUSHY CREEK SEC 2 |
| Legal Block | 13 |
| Legal Lot Number | 30 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 20515 |
3604 Cornerstone St is owned and occupied by two individuals who bought it in December 2010.
Source: Williamson County records, as of September 11, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 3604 CORNERSTONE ST, ROUND ROCK, TX 78681-3709 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 21, 2010 · Amount on File |
| Deed Sale | Dec 21, 2010 · Amount on File |
| Prior Sale | Aug 11, 2009 · Amount on File |
| Deed Document Number | 201086466 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Property Address | 3604 CORNERSTONE ST, ROUND ROCK, TX 78681-3709 |
| Transaction Type | Mortgage |
| Record Updated | Mar 1, 2022 |
| Title Company | FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE CO |
| Name | Verified Name |
|---|---|
| Address | 3604 CORNERSTONE ST, ROUND ROCK, TX 78681-3709 |
| Document Number | 0000020369 |
|---|---|
| Date | Feb 16, 2022 |
| Instrument | 2022020369 |
| Name | MIDLAND MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Address | OKLAHOMA CITY, OK 73118 |
| Type | FHA Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Feb 1, 2052 |
The 2025 property tax bill for 3604 Cornerstone St was $4,947 with a homeowner's exemption.
Source: Williamson County assessment roll, as of September 11, 2026
| Type | Name |
|---|---|
| State | Texas |
| County | Williamson County |
| Unified School District | Round Rock Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $4,947.00 Homeowner's exemption | $300,142 Land $71,500 Building $228,642 | $300,142 Land $71,500 Building $228,642 |
| 2023 | $4,562.00 (-8.71%) Homeowner's exemption | $333,400 Land $83,000 Building $250,400 | $333,400 Land $83,000 Building $250,400 |
| 2022 | $4,997.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 3604 Cornerstone St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective October 5, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 3604 Cornerstone St is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.8% of the US · lower than 99.8% of Texas |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | BRUSHY CREEK MUD serves 18,314 people · EPA ID TX2460061 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | May 2025 |
| Lead | 1 ppb (2023–2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 794 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: SOS Communications, VTX Communications, Western Broadband.
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