Williamson County property record for 16505 Castletroy Dr, Austin, TX 78717
| Property Type | Single Family Home |
|---|---|
| Details | 2 ba · 1,872 sqft · built 2004 |
| Lot Size | 0.169 acres (7,349 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $527,725 (Aug 2026) |
| Tax Bill | $7,450 (2025) |
| Deeds & Mortgages | Sep 2021 Mortgage Aug 2026 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | R-16-3020-000A-0075 |
| Primary APN | R-16-3020-000A-0075 |
|---|---|
| Alternative APNs |
|
| Full Baths | 2 Baths |
|---|---|
| Stories | 1 Story |
| Building Area | 1,872 sqft Living Area |
| 1st Floor Area | 1,872 sqft |
| Flooring | Carpet |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 2004 |
|---|---|
| Effective Year Built | Effective 2004 |
| Exterior Material | Brick Veneer |
| Roof Type | Hip |
| Lot Area | 7,349 sqft (0.169 acres) |
| Garage Area | 420 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
| Porch Area | 152 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Account Number | R163020000A0075 |
|---|---|
| Street Address | 16505 CASTLETROY DR |
| City | AUSTIN |
| State | TX |
| Zip | 78717-5524 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | S7676 - AVERY RANCH EAST PH 1, BLOCK A, LOT 75 |
| Legal Subdivision | AVERY RANCH EAST PH 1 |
| Legal Phase | 1 |
| Legal Block | A |
| Legal Lot Number | 75 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 4 |
| Census Block | 4008 |
| Census Tract | 20509 |
16505 Castletroy Dr is owned and occupied by two individuals who bought it in August 2026.
Source: Williamson County records, as of September 11, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 16505 CASTLETROY DR, AUSTIN, TX 78717-5524 |
| 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.
| Date | Document |
|---|---|
| Sep 28, 2021 | Vendor's Lien, Transfer · Conventional Mortgage NETWORK FUNDING LP |
| Aug 19, 2026 | Deed, Transfer · Conventional Mortgage NETWORK FUNDING LP |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Aug 19, 2026 · Amount on File |
| Deed Sale | Aug 19, 2026 · Amount on File |
| Prior Sale | Jul 18, 2012 · Amount on File |
| Deed Document Number | 202670178 |
| Prior Transfer Date | Jul 13, 2012 |
| Prior Transfer Doc | 0000056396 |
| Record Updated | Oct 29, 2026 |
| Document Type | Vendor's Lien |
|---|---|
| Jurisdiction | TRAVIS TX |
| Recording Date | Sep 28, 2021 |
| Property Address | 16505 CASTLETROY DR, AUSTIN, TX 78717-5524 |
| Document Number | 0000216286 |
| Map Reference | CAB U SL 62 |
| Instrument Date | Sep 24, 2021 |
| Instrument | 2021216286 |
| Transaction Type | Transfer |
| Record Updated | Oct 13, 2021 |
| Title Company | INDEPENDENCE TITLE |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 415 TOM SAWYER RD, 415, DRIPPING SPRINGS, TX 78620-4318 |
| Name | Verified Name |
|---|---|
| Address | 16505 CASTLETROY DR, AUSTIN, TX 78717-5524 |
| Document Number | 0000216288 |
|---|---|
| Date | Sep 28, 2021 |
| Instrument | 2021216288 |
| Name | NETWORK FUNDING LP |
|---|---|
| Type | Mortgage Company |
| Special Notes | Seller Financed |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Oct 1, 2051 |
| Document Type | Deed |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Recording Date | Aug 19, 2026 |
| Property Address | 16505 CASTLETROY DR, AUSTIN, TX 78717-5524 |
| Document Number | 0000070178 |
| Instrument Date | Sep 24, 2021 |
| Instrument | 202670178 |
| Transaction Type | Transfer |
| Record Updated | Oct 23, 2026 |
| Title Company | INDEPENDENCE TITLE |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 16505 CASTLETROY DR, AUSTIN, TX 78717-5524 |
| Document Number | 0000070179, |
|---|---|
| Date | Aug 19, 2026 |
| Instrument | 202670179 |
| Name | NETWORK FUNDING LP |
|---|
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 302 Months |
| Due | Oct 1, 2051 |
| Rate Type | Fixed Rate |
|---|---|
| Initial Type | Fixed Rate |
| Max Rate | -1% |
The 2025 property tax bill for 16505 Castletroy Dr was $7,450, down 2% from the year before.
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 | $7,450.00 (-1.99%) Homeowner's exemption | $467,782 Land $106,000 Building $361,782 | $467,782 Land $106,000 Building $361,782 |
| 2024 | $7,601.00 (+2.12%) | ||
| 2023 | $7,443.00 (-29.84%) Homeowner's exemption | $469,162 Land $115,000 Building $354,162 | $469,162 Land $115,000 Building $354,162 |
| 2022 | $10,608.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 16505 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.
Wildfire risk around 16505 Castletroy Dr 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 | 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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