Williamson County property record for 3900 Upper Passage Ln, Round Rock, TX 78681
| Property Type | Common Area (Residential) |
|---|---|
| Details | 2,196 sqft · built 2009 |
| Lot Size | 1.78 acres (77,798 sqft) |
| Owner | Company Name on File |
| Tax Bill | $487 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | R-16-5010-000B-0038 |
| Primary APN | R-16-5010-000B-0038 |
|---|---|
| Alternative APNs |
|
| Stories | 1 Story |
|---|---|
| Building Area | 2,196 sqft Gross Area |
| 1st Floor Area | 1,548 sqft |
| Year Built | Built 2009 |
|---|---|
| Effective Year Built | Effective 2009 |
| Lot Area | 77,798 sqft |
| Pool Area | 3,492 sqft |
|---|---|
| Porch | Open Porch |
| Porch Area | 912 sqft |
| Patio Area | 264 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Account Number | R165010000B0038 |
|---|---|
| Street Address | 3900 UPPER PASSAGE LN |
| City | ROUND ROCK |
| State | TX |
| Zip | 78681 |
| Property Category | Other |
| Property Type | Other > Common Area (Residential) |
| Local Zoning Code | SF2 |
| Legal Description | S7149 - PRESERVE AT STONE OAK PH 1 SEC 1, BLOCK B, LOT 38, ACRES 1.786, (PARK, AMENITIES) |
| Legal Subdivision | PRESERVE AT STONE OAK PH 1 SEC 1 |
| Legal Phase | 1 |
| Legal Block | B |
| Legal Lot Number | 38 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 3 |
| Census Block | 3007 |
| Census Tract | 20608 |
3900 Upper Passage Ln is owned by a company that acquired it in November 2018.
Source: Williamson County records, as of September 11, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | PO BOX 203310, AUSTIN, TX 78720-3310 |
| Owner Type | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Nov 2, 2018 |
| Deed Sale | Nov 2, 2018 |
| Deed Document Number | 201897964 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 3900 Upper Passage Ln was $487.
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 | $487.00 | $27,609 Land $536 Building $27,073 | $27,609 Land $536 Building $27,073 |
| 2023 | $395.00 (-7.49%) | $22,559 Land $536 Building $22,023 | $22,559 Land $536 Building $22,023 |
| 2022 | $427.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 3900 Upper Passage Ln 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 | 1 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 3900 Upper Passage Ln is low, with a 0.03% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 65% of the US · lower than 90% of Texas |
|---|---|
| Wildfire Likelihood | 0.03% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 364 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: VTX Communications, Western Broadband.
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