Harris County property record for 509 Main St, Houston, TX 77002
| Property Type | Townhouse |
|---|---|
| Details | 5,000 sqft · built 1920 |
| Lot Size | 0.057 acres (2,500 sqft) |
| Owner | Company Name on File |
| Last Sale | $1,210,300 (Sep 2024) |
| Tax Bill | $18,193 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 001-056-000-0008 |
| Primary APN | 001-056-000-0008 |
|---|
| Stories | 2 Stories |
|---|---|
| Building Area | 5,000 sqft Living Area |
| 1st Floor Area | 2,500 sqft |
| Year Built | Built 1920 |
|---|---|
| Effective Year Built | Effective 2024 |
| Architectural Style | Townhouse |
| Exterior Material | Brick |
| Construction Type | Masonry / Concrete Block |
| Fire Resistance | Masonry Walls, Wood Interior |
| Lot Area | 2,500 sqft (0.057 acres) |
| Cooling System | Central |
|---|---|
| Heating System | HVAC |
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 0010560000008 |
|---|---|
| Street Address | 509 MAIN ST |
| City | HOUSTON |
| State | TX |
| Zip | 77002-3104 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Townhouse |
| Legal Description | TR 8 BLK 56 SSBB |
| Legal Subdivision | SOUTH SIDE OF BUFFALO BAYOU |
| Legal Tract | 8 |
| Legal Block | 56 |
| Jurisdiction | HARRIS TX |
| Township / Civil Division | HOUSTON |
| Census Block Group | 1 |
| Census Block | 1071 |
| Census Tract | 980700 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the Main Street/Market Square Historic District listed 1983 · 55 contributing resources · NRIS 83004471 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
509 Main St, a townhouse, is owned by a company that bought it in September 2024.
Source: Harris County records, as of September 29, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 3302 ONION CRK, SUGAR LAND, TX 77479-2546 |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
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 | Sep 9, 2024 · Amount on File |
| Deed Sale | Sep 9, 2024 · Amount on File |
| Prior Sale | Dec 3, 2007 · Amount on File |
| Deed Document Number | 2024331215 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 509 Main St was $18,193, up 3% from the year before.
Source: Harris County assessment roll, as of September 29, 2026
| Type | Name |
|---|---|
| State | Texas |
| County | Harris County |
| Municipality | Houston City |
| Unified School District | Houston Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $1,245,731 (+1.6%) Land $375,000 Building $870,731 | $1,245,731 (+1.6%) Land $375,000 Building $870,731 | |
| 2025 | $18,193.00 (+29.99%) | $1,226,132 Land $375,000 Building $851,132 | $1,226,132 Land $375,000 Building $851,132 |
| 2024 | $13,996.00 | ||
| 2023 | $709,088 Land $375,000 Building $334,088 | $709,088 Land $375,000 Building $334,088 | |
| 2020 | $19,750.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 509 Main St in Zone X, an area of minimal flood risk, though there have been 22 flood claims nearby since 2008.
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 File median of 46 individual policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 195 units insured incl. 149 condo units |
| Nearby Flood Claims | 22 (2008–2024) |
| Claims Outside the SFHA | 3 of 22 |
| Most Recent Claim | Jul 2024 · Hurricane Beryl |
| 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.
The area around 509 Main St 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 HOUSTON serves 2,970,543 people · EPA ID TX1010013 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Oct 2025 |
| Lead | 5 ppb (2024) action level 15 ppb |
| Water Quality | Turbidity resolved · May 2025 |
|---|---|
| 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 130 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable · Fiber in parts of the area | 2,000 / 2,000 |
| AT&T Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
May also be available: IBT Connect, T-Mobile, Verizon.
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