Hidalgo County property record for 509 W Diamond Head Ave, Alton, TX 78573
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,584 sqft · built 1997 |
| Lot Size | 0.161 acres (7,000 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $1,194 (2025) |
| APN | A268000000010300 |
| Primary APN | A268000000010300 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Stories | 1 Story |
| Building Area | 1,584 sqft Living Area |
| 1st Floor Area | 1,584 sqft |
| Utility Area | 376 sqft |
| Flooring | Tile |
| Year Built | Built 1997 |
|---|---|
| Effective Year Built | Effective 2011 |
| Exterior Material | Stucco |
| Construction Type | Frame |
| Roof Type | Hip |
| Roof Material | Composition Shingle |
| Lot Area | 7,000 sqft (0.161 acres) |
| Lot Dimensions | 117 ft deep x 60 ft wide |
| Garage Type | Carport |
| Garage Area | 336 sqft |
| Carport | Carport |
| Carport Area | 336 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | HVAC |
|---|
| Street Address | 509 W DIAMOND HEAD AVE |
|---|---|
| City | ALTON |
| State | TX |
| Zip | 78573-1081 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R |
| Legal Description | ALOHA VILLAGE LOT 103 |
| Legal Subdivision | ALOHA VILLAGE - SMS |
| Legal Tract | 103 |
| Legal Block | 2 |
| Legal Lot Number | 103 |
| Jurisdiction | HIDALGO TX |
| Township / Civil Division | MISSION |
| Census Block Group | 2 |
| Census Block | 2018 |
| Census Tract | 24124 |
509 W Diamond Head Ave is owned and occupied by two individuals.
Source: Hidalgo County records, as of September 16, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 509 W DIAMOND HEAD AVE, ALTON, TX 78573-1081 |
| 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.
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 509 W Diamond Head Ave was $1,194 with a homeowner's exemption, up 27.2% from the year before.
Source: Hidalgo County assessment roll, as of September 16, 2026
| Type | Name |
|---|---|
| State | Texas |
| Municipality | Alton City |
| County | Hidalgo County |
| Unified School District | Mission Consolidated Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $85,396 (+1%) | $119,988 (-1.12%) Land $38,501 Building $81,487 | |
| 2025 | $1,194.00 (+27.16%) Homeowner's exemption | $77,633 Land $38,501 Building $82,842 | $121,343 Land $38,501 Building $82,842 |
| 2024 | $939.00 (+10.34%) | ||
| 2023 | $851.00 (-0.7%) Homeowner's exemption | $64,159 Land $32,201 Building $56,142 | $88,343 Land $32,201 Building $56,142 |
| 2022 | $857.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA has no flood map on file for 509 W Diamond Head Ave; there have been 1 flood claim nearby since 2020.
Source: FEMA National Flood Hazard Layer · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Not on file |
|---|---|
| Nearby Flood Policies | 6 in force |
| Nearby Flood Claims | 1 (2020) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Jul 2020 · Hurricane Hanna |
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 509 W Diamond Head Ave 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 98% of the US · lower than 98.8% 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 | SHARYLAND WSC serves 68,562 people · EPA ID TX1080033 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Sep 2025 |
| Lead | 1 ppb (2024) action level 15 ppb |
| Water Quality | Chlorite resolved · Jan 2019 |
|---|---|
| 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 291 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable · Fiber in parts of the area | 1,000 / 1,000 |
| TWIN Fixed Wireless | 400 / 100 |
| VTX Communications Fixed Wireless | 400 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless · Fiber in parts of the area | 100 / 20 |
May also be available: Metronet.
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