Williamson County property record for 421 Fort Thomas Pl, Round Rock, TX 78664
| Property Type | Single Family Home |
|---|---|
| Details | 2 ba · 2,010 sqft · built 2005 |
| Lot Size | 0.134 acres (5,853 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $160,700 (Oct 2005) |
| Tax Bill | $5,628 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | R-16-4146-000D-0014 |
| Primary APN | R-16-4146-000D-0014 |
|---|---|
| Alternative APNs |
|
| Full Baths | 2 Baths |
|---|---|
| Stories | 2 Stories |
| Building Area | 2,010 sqft Living Area |
| 1st Floor Area | 920 sqft |
| 2nd Floor Area | 1,090 sqft |
| Flooring | Carpet |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 2005 |
|---|---|
| Effective Year Built | Effective 2005 |
| Exterior Material | Stone |
| Roof Type | Hip |
| Lot Area | 5,853 sqft (0.134 acres) |
| Garage Area | 420 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
| Porch Area | 115 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Account Number | R164146000D0014 |
|---|---|
| Street Address | 421 FORT THOMAS PL |
| City | ROUND ROCK |
| State | TX |
| Zip | 78664-7437 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | SF2 |
| Legal Description | S8733 - ROUND ROCK RANCH PH 1 SEC 3-C-2, BLOCK D, LOT 14 |
| Legal Subdivision | ROUND ROCK RANCH PH 1 SEC 3-C-2 |
| Legal Phase | 1 |
| Legal Block | D |
| Legal Lot Number | 14 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 20712 |
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 | 2 Individual Names on Record |
|---|---|
| Mailing Address | 421 FORT THOMAS PL, ROUND ROCK, TX 78664-7437 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 5, 2005 · Amount on Record |
| Deed Sale | Oct 5, 2005 · Amount on Record |
| Deed Document Number | 200579276 |
| Record Updated | Oct 29, 2026 |
Source: Williamson County assessment roll, as of September 11, 2026
| Type | Name |
|---|---|
| State | Texas |
| County | Williamson County |
| Municipality | Round Rock City |
| Unified School District | Round Rock Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $5,628.00 (+20.72%) Homeowner's exemption | $371,495 (-5.86%) Land $83,000 Building $288,495 | $371,495 (-5.86%) Land $83,000 Building $288,495 |
| 2023 | $4,662.00 (-7.94%) Homeowner's exemption | $394,629 Land $91,000 Building $303,629 | $394,629 Land $91,000 Building $303,629 |
| 2022 | $5,064.00 |
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 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 9 in force |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 97% of the US · lower than 98.3% 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 | CITY OF ROUND ROCK serves 130,662 people · EPA ID TX2460003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Sep 2023 |
| Lead | 5 ppb (2021–2023) 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 614 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Google Fiber Fiber | 8,000 / 8,000 |
| AT&T Fiber | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: SOS Communications.
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