Williamson County property record for 3603 Cornerstone St, Round Rock, TX 78681
| Property Type | Single Family Home |
|---|---|
| Details | 2 ba · 1,269 sqft · built 1982 |
| Lot Size | 0.193 acres (8,427 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $238,800 (Jul 2020) |
| Tax Bill | $4,972 (2025) |
| Deeds & Mortgages | Jul 2020 Mortgage Dec 2017 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | R-16-3466-0015-0011 |
| Primary APN | R-16-3466-0015-0011 |
|---|---|
| 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 1991 |
| Exterior Material | Wood |
| Roof Type | Gable |
| Lot Area | 8,427 sqft (0.193 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 | R16346600150011 |
|---|---|
| Street Address | 3603 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 11 |
| Legal Subdivision | BRUSHY CREEK SEC 2 |
| Legal Block | 15 |
| Legal Lot Number | 11 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 20515 |
Source: Williamson County records, as of September 11, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Mailing Address | 3603 CORNERSTONE ST, ROUND ROCK, TX 78681-3708 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Jul 9, 2020 | Warranty Deed, Transfer UNIVERSITY CU |
| Dec 28, 2017 | Vendor's Lien, Transfer · Conventional Mortgage CERTAINTY HOME LOANS LLC |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jul 9, 2020 · Amount on Record |
| Deed Sale | Jul 9, 2020 · Amount on Record |
| Prior Sale | Dec 28, 2017 · Amount on Record |
| Deed Document Number | 202075071 |
| Prior Transfer Date | Jul 7, 2020 |
| Prior Transfer Doc | 0000075071 |
| Record Updated | Oct 29, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Recording Date | Jul 9, 2020 |
| Property Address | 3603 CORNERSTONE ST, ROUND ROCK, TX 78681-3708 |
| Document Number | 0000075071 |
| Instrument Date | Jul 7, 2020 |
| Instrument | 75071 |
| Transaction Type | Transfer |
| Record Updated | Jul 29, 2020 |
| Title Company | FIRST AMERICAN TITLE |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 8503 MILLWAY DR AUSTIN TX 787577542, AUSTIN, TX 78757-7542 |
| Document Number | 75072 |
|---|---|
| Date | Jul 9, 2020 |
| Instrument | 75072 |
| Name | UNIVERSITY CU |
|---|---|
| Type | Credit Union |
| Address | AUSTIN, TX 78759 |
| Amount | Amount Recorded |
|---|---|
| Term | 360 Months |
| Due | Jul 8, 2050 |
| Document Type | Vendor's Lien |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Recording Date | Dec 28, 2017 |
| Property Address | 3603 CORNERSTONE ST, ROUND ROCK, TX 78681-3708 |
| Document Number | 0000118900 |
| Map Reference | CAB C SL324-331 |
| Instrument Date | Dec 28, 2017 |
| Instrument | 2017118900 |
| 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 | 3603 CORNERSTONE ST, ROUND ROCK, TX 78681-3708 |
| Document Number | 0000118901 |
|---|---|
| Date | Dec 28, 2017 |
| Instrument | 2017118901 |
| Name | CERTAINTY HOME LOANS LLC |
|---|---|
| Type | Mortgage Company |
| Special Notes | Seller Financed |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jan 1, 2048 |
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 | $4,972.00 (+6.1%) Homeowner's exemption | $297,588 (-13.2%) Land $71,500 Building $226,088 | $297,588 (-13.2%) Land $71,500 Building $226,088 |
| 2023 | $4,686.00 (-8.46%) Homeowner's exemption | $342,832 Land $83,000 Building $259,832 | $342,832 Land $83,000 Building $259,832 |
| 2022 | $5,119.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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.
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.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures