Williamson County property record for 3606 Cornerstone St, Round Rock, TX 78681
| Property Type | Single Family Home |
|---|---|
| Details | 2 ba · 1,264 sqft · built 1982 |
| Lot Size | 0.194 acres (8,464 sqft) |
| Owner | Individual Name on File |
| Last Sale | $237,500 (Dec 2017) |
| Tax Bill | $6,716 (2025) |
| Deeds & Mortgages | Dec 2021 Mortgage Dec 2017 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | R-16-3466-0013-0031 |
| Primary APN | R-16-3466-0013-0031 |
|---|---|
| Alternative APNs |
|
| Full Baths | 2 Baths |
|---|---|
| Stories | 1 Story |
| Building Area | 1,264 sqft Living Area |
| 1st Floor Area | 1,264 sqft |
| Flooring | Carpet |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1982 |
|---|---|
| Effective Year Built | Effective 1982 |
| Exterior Material | Stone |
| Roof Type | Gable |
| Roof Material | Other |
| Lot Area | 8,464 sqft (0.194 acres) |
| Garage Area | 428 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
|---|---|
| Porch Area | 16 sqft |
| Patio Area | 142 sqft |
| Utility Building | 168 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Gas |
| Sewer | Connected |
| Account Number | R16346600130031 |
|---|---|
| Street Address | 3606 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 31 |
| Legal Subdivision | BRUSHY CREEK SEC 2 |
| Legal Block | 13 |
| Legal Lot Number | 31 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 20515 |
3606 Cornerstone St is owned by an individual who bought it in December 2017.
Source: Williamson County records, as of September 11, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 1804 E 14TH ST, 2, AUSTIN, TX 78702-1204 |
| 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.
| Date | Document |
|---|---|
| Dec 8, 2021 | Deed of Trust, Mortgage · Conventional Mortgage ROCKET MORTGAGE LLC |
| Dec 19, 2017 | Warranty Deed, Transfer · Conventional Mortgage AUSTIN CAPITAL MORTGAGE INC |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Dec 19, 2017 · Amount on File |
| Deed Sale | Dec 19, 2017 · Amount on File |
| Deed Document Number | 2017115933 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Property Address | 3606 CORNERSTONE ST, ROUND ROCK, TX 78681-3709 |
| Transaction Type | Mortgage |
| Record Updated | Dec 22, 2021 |
| Title Company | AMROCK INC |
| Name | Verified Name |
|---|
| Document Number | 0000186433 |
|---|---|
| Date | Dec 8, 2021 |
| Instrument | 2021186433 |
| Name | ROCKET MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | DETROIT, MI 48226 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jan 1, 2052 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Recording Date | Dec 19, 2017 |
| Property Address | 3606 CORNERSTONE ST, ROUND ROCK, TX 78681-3709 |
| Document Number | 0000115933 |
| Map Reference | CAB C SL324 |
| Instrument Date | Dec 18, 2017 |
| Instrument | 2017115933 |
| Transaction Type | Transfer |
| Record Updated | Dec 6, 2021 |
| Title Company | AUSTIN TITLE CO |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 00000 |
| Name | Verified Name |
|---|---|
| Address | 3606 CORNERSTONE ST, ROUND ROCK, TX 78681-3709 |
| Document Number | 0000115934 |
|---|---|
| Date | Dec 19, 2017 |
| Instrument | 2017115934 |
| Name | AUSTIN CAPITAL MORTGAGE INC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jan 1, 2048 |
The 2025 property tax bill for 3606 Cornerstone St was $6,716.
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 | $6,716.00 | $275,273 Land $71,500 Building $203,773 | $275,273 Land $71,500 Building $203,773 |
| 2023 | $6,357.00 (-21.76%) | $330,089 Land $83,000 Building $247,089 | $330,089 Land $83,000 Building $247,089 |
| 2022 | $8,125.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 3606 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 3606 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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