Travis County property record for 5100 Portmarnock Ct, Austin, TX 78747
| Property Type | Single Family Home |
|---|---|
| Details | 3 ba · 2,509 sqft · built 1996 |
| Lot Size | 0.297 acres (12,959 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $3,606 (2024) |
| Flood Zone | Zone X (minimal risk) |
| APN | 0443070404 |
| Primary APN | 0443070404 |
|---|---|
| Alternative APNs |
|
| Full Baths | 3 Baths |
|---|---|
| Stories | 1 Story |
| Building Area | 2,509 sqft Living Area |
| Gross Area | 2,949 sqft |
| 1st Floor Area | 2,509 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1996 |
|---|---|
| Construction Type | Wood Frame |
| Foundation Type | Slab (Mat/Raft) |
| Roof Type | Hip |
| Roof Material | Composition Shingle |
| Lot Area | 12,959 sqft (0.297 acres) |
| Garage Type | Attached |
| Garage Area | 440 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
| Porch Area | 165 sqft |
| Patio Area | 341 sqft |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Account Number | 373913 |
|---|---|
| Old Parcel Number | 04430704040000 |
| Street Address | 5100 PORTMARNOCK CT |
| City | AUSTIN |
| State | TX |
| Zip | 78747-1466 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 19 BLK C ONION CREEK ADDN |
| Legal Subdivision | ONION CREEK ADDN |
| Legal Block | C |
| Legal Lot Number | 19 |
| Jurisdiction | TRAVIS TX |
| Township / Civil Division | AUSTIN |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 2446 |
Source: Travis County records, as of November 3, 2025
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 | 5100 PORTMARNOCK CT, AUSTIN, TX 78747-1466 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Aug 13, 1996 |
| Deed Sale | Aug 13, 1996 |
| Deed Document Number | 0127490570 |
| Deed Book / Page | 12749 / 0570 |
| Record Updated | Jun 8, 2026 |
Source: Travis County assessment roll, as of August 1, 2025
| Type | Name |
|---|---|
| State | Texas |
| Municipality | Austin City |
| County | Travis County |
| Unified School District | Austin Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $559,333 (-8.67%) Land $75,769 Building $516,430 | $592,199 (-3.3%) Land $75,769 Building $516,430 | |
| 2024 | $3,606.00 (-28.59%) | ||
| 2023 | $612,400 Land $72,600 Building $539,800 | $612,400 Land $72,600 Building $539,800 | |
| 2022 | $5,050.00 |
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 May 17, 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 |
| Flood Insurance Cost | Premium on Record median of 94 individual policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 106 units insured incl. 12 condo units |
| Nearby Flood Claims | 2 (2015) |
| Claims Outside the SFHA | 1 of 2 |
| Most Recent Claim | Oct 2015 · Severe Storms, Tornadoes, Straight-line Winds, And Flooding |
| Claims by Event |
|
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 62% of the US · lower than 87% of Texas |
|---|---|
| Wildfire Likelihood | 0.06% annual chance |
| Exposure | Direct burnable vegetation |
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 230 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 |
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