Williamson County property record for 3705 Cornerstone St, Round Rock, TX 78681
| Property Type | Single Family Home |
|---|---|
| Details | 1,344 sqft · built 1980 |
| Lot Size | 0.182 acres (7,932 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $2,328 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | R-16-3466-0015-0002 |
| Primary APN | R-16-3466-0015-0002 |
|---|---|
| Alternative APNs |
|
| Stories | 1 Story |
|---|---|
| Building Area | 1,344 sqft Living Area |
| 1st Floor Area | 1,344 sqft |
| Flooring | Carpet |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1980 |
|---|---|
| Effective Year Built | Effective 1980 |
| Exterior Material | Stone |
| Roof Type | Gable |
| Lot Area | 7,932 sqft (0.182 acres) |
| Garage Area | 460 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
| Porch Area | 384 sqft |
| Utility Building | 72 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Gas |
| Sewer | Connected |
| Account Number | R16346600150002 |
|---|---|
| Street Address | 3705 CORNERSTONE ST |
| City | ROUND ROCK |
| State | TX |
| Zip | 78681-3747 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | S3261 - BRUSHY CREEK SEC 2, BLOCK 15, LOT 2 |
| Legal Subdivision | BRUSHY CREEK SEC 2 |
| Legal Block | 15 |
| Legal Lot Number | 2 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 20515 |
3705 Cornerstone St is owned and occupied by two individuals who acquired it in June 2009.
Source: Williamson County records, as of September 11, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 3705 CORNERSTONE ST, ROUND ROCK, TX 78681-3747 |
| 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 | Jun 24, 2009 |
| Deed Sale | Jun 24, 2009 |
| Deed Document Number | 200945195 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 3705 Cornerstone St was $2,328 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 | $2,328.00 Homeowner's exemption Senior Citizen's exemption | $295,161 Land $71,500 Building $223,661 | $295,161 Land $71,500 Building $223,661 |
| 2023 | $3,017.00 (-32.7%) Homeowner's exemption Senior Citizen's exemption | $329,263 Land $83,000 Building $246,263 | $329,263 Land $83,000 Building $246,263 |
| 2022 | $4,483.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 3705 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.
The area around 3705 Cornerstone St has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 510 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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