Williamson County property record for 16417 Castletroy Dr, Austin, TX 78717
| Property Type | Single Family Home |
|---|---|
| Details | 2.5 ba · 2,219 sqft · built 2002 |
| Lot Size | 0.16 acres (6,965 sqft) |
| Owner | Company Name on File |
| Tax Bill | $10,367 (2025) |
| Deeds & Mortgages | May 2023 Transfer May 2019 Sale + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | R-16-3020-000A-0071 |
| Primary APN | R-16-3020-000A-0071 |
|---|---|
| Alternative APNs |
|
| Full Baths | 2.5 Baths |
|---|---|
| Half Baths | 1 Half Bath |
| Stories | 2 Stories |
| Building Area | 2,219 sqft Living Area |
| 1st Floor Area | 1,126 sqft |
| 2nd Floor Area | 1,093 sqft |
| Flooring | Carpet |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 2002 |
|---|---|
| Effective Year Built | Effective 2002 |
| Exterior Material | Stone |
| Roof Type | Hip |
| Lot Area | 6,965 sqft (0.16 acres) |
| Garage Area | 443 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
| Porch Area | 338 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Account Number | R163020000A0071 |
|---|---|
| Street Address | 16417 CASTLETROY DR |
| City | AUSTIN |
| State | TX |
| Zip | 78717-5523 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | S7676 - AVERY RANCH EAST PH 1, BLOCK A, LOT 71 |
| Legal Subdivision | AVERY RANCH EAST PH 1 |
| Legal Phase | 1 |
| Legal Block | A |
| Legal Lot Number | 71 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 4 |
| Census Block | 4008 |
| Census Tract | 20509 |
16417 Castletroy Dr is owned by a company that acquired it in May 2019.
Source: Williamson County records, as of September 11, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 20048 MARIGNY PL, SARATOGA, CA 95070-3086 |
| Owner Type | Company |
| Vesting | Life Tenant |
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 |
|---|---|
| May 9, 2023 | Intrafamily Transfer, Transfer |
| May 29, 2019 | Warranty Deed, Transfer AUSTIN TITLE |
| Jan 24, 2018 | Deed of Trust, Mortgage · Line of Credit AMPLIFY CU |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | May 29, 2019 |
| Deed Sale | May 29, 2019 |
| Prior Sale | Jul 9, 2014 · Amount on File |
| Deed Document Number | 201946381 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Recording Date | May 9, 2023 |
| Property Address | 16417 CASTLETROY DR, AUSTIN, TX 78717-5523 |
| Document Number | 0000037559 |
| Map Reference | CAB U SL 62 |
| Instrument Date | May 5, 2023 |
| Instrument | 2023037559 |
| Transaction Type | Transfer |
| Record Updated | Jun 7, 2023 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 20048 MARIGNY PL, SARATOGA, CA 95070-3086 |
| Name | Verified Name |
|---|---|
| Relationship | Living Trust |
| Address | 20048 MARIGNY PL, SARATOGA, CA 95070-3086 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Recording Date | May 29, 2019 |
| Property Address | 16417 CASTLETROY DR, AUSTIN, TX 78717-5523 |
| Document Number | 0000046381 |
| Instrument Date | May 28, 2019 |
| Instrument | 46381 |
| Transaction Type | Transfer |
| Record Updated | Jun 11, 2019 |
| Title Company | AUSTIN TITLE |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 20048 MARIGNY PL SARATOGA CA 950703086, SARATOGA, CA 95070-3086 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Property Address | 16417 CASTLETROY DR, AUSTIN, TX 78717-5523 |
| Document Number | 0000009130 |
| Instrument Date | Jan 24, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Feb 20, 2018 |
| Name | Verified Name |
|---|---|
| Relationship | Married Couple |
| Address | 16417 CASTLETROY DR AUSTIN TX 787175523, AUSTIN, TX 78717-5523 |
| Document Number | 0000009130 |
|---|---|
| Date | Feb 1, 2018 |
| Instrument | 9130 |
| Name | AMPLIFY CU |
|---|---|
| Address | AUSTIN, TX 78727 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|
The 2025 property tax bill for 16417 Castletroy Dr was $10,367.
Source: Williamson County assessment roll, as of September 11, 2026
| Type | Name |
|---|---|
| State | Texas |
| Municipality | Austin City |
| County | Williamson County |
| Unified School District | Round Rock Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $10,367.00 | $509,863 Land $106,000 Building $403,863 | $509,863 Land $106,000 Building $403,863 |
| 2023 | $9,419.00 (-24.17%) | $498,431 Land $115,000 Building $383,431 | $498,431 Land $115,000 Building $383,431 |
| 2022 | $12,421.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 16417 Castletroy Dr in Zone X, an area of minimal flood risk.
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 |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 3 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.
The area around 16417 Castletroy Dr 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 | CITY OF AUSTIN WATER & WASTEWATER serves 1,115,323 people · EPA ID TX2270001 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jul 2023 |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | Turbidity resolved · Feb 2022 |
|---|---|
| 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 489 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| Google Fiber Fiber | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Astound Broadband, VTX Communications, Western Broadband.
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