Williamson County property record for 3609 Cornerstone St, Round Rock, TX 78681
| Property Type | Single Family Home |
|---|---|
| Details | 2 ba · 1,269 sqft · built 1982 |
| Lot Size | 0.175 acres (7,635 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $2,480 (2025) |
| Deeds & Mortgages | Jan 2022 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | R-16-3466-0015-0008 |
| Primary APN | R-16-3466-0015-0008 |
|---|---|
| Alternative APNs |
|
| Full Baths | 2 Baths |
|---|---|
| Stories | 1 Story |
| Building Area | 1,269 sqft Living Area |
| 1st Floor Area | 1,269 sqft |
| Flooring | Carpet |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1982 |
|---|---|
| Effective Year Built | Effective 1990 |
| Exterior Material | Wood |
| Roof Type | Gable |
| Lot Area | 7,635 sqft (0.175 acres) |
| Garage Area | 423 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
| Porch Area | 16 sqft |
| Patio Area | 118 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Gas |
| Sewer | Connected |
| Account Number | R16346600150008 |
|---|---|
| Street Address | 3609 CORNERSTONE ST |
| City | ROUND ROCK |
| State | TX |
| Zip | 78681-3708 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | S3261 - BRUSHY CREEK SEC 2, BLOCK 15, LOT 8 |
| Legal Subdivision | BRUSHY CREEK SEC 2 |
| Legal Block | 15 |
| Legal Lot Number | 8 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 20515 |
3609 Cornerstone St is owned and occupied by an individual who acquired it in January 2022.
Source: Williamson County records, as of September 11, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 3609 CORNERSTONE ST, ROUND ROCK, TX 78681-3708 |
| 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 | Name on Deed |
|---|---|
| Last Transfer Date | Jan 25, 2022 |
| Transfer Doc | 0000010394 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Distribution |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Recording Date | Jan 25, 2022 |
| Property Address | 3609 CORNERSTONE ST, ROUND ROCK, TX 78681-3708 |
| Document Number | 0000010394 |
| Map Reference | CAB C SL 324-331 |
| Instrument Date | Jan 25, 2022 |
| Instrument | 2022010394 |
| Transaction Type | Transfer |
| Record Updated | Feb 4, 2022 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 3609 CORNESTONE STREET, ROUND ROCK, TX 78681-3708 |
The 2025 property tax bill for 3609 Cornerstone St was $2,480 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 | $2,480.00 Homeowner's exemption Senior Citizen's exemption | $290,537 Land $71,500 Building $219,037 | $290,537 Land $71,500 Building $219,037 |
| 2023 | $2,894.00 (-28.56%) Homeowner's exemption Senior Citizen's exemption | $333,731 Land $83,000 Building $250,731 | $333,731 Land $83,000 Building $250,731 |
| 2022 | $4,051.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 3609 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 3609 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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