Shiawassee County property record for 509 E Mason St, Owosso, MI 48867 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Lot Size | 0.18 acres (7,841 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $1,681 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 050-668-000-030-00 |
| Primary APN | 050-668-000-030-00 |
|---|
| Lot Area | 7,841 sqft (0.18 acres) |
|---|
| Street Address | 509 E MASON ST |
|---|---|
| City | OWOSSO |
| State | MI |
| Zip | 48867-3035 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | S 138' OF E 58' OF LOT 23 A L & B O WILLIAMS SUBDIV OF OUTLOTS 8 & 9 |
| Legal Subdivision | WILLIAMS SUBDIV |
| Legal Lot Number | 23 |
| Jurisdiction | SHIAWASSEE MI |
| Township / Civil Division | OWOSSO |
| Census Block Group | 3 |
| Census Block | 3016 |
| Census Tract | 30500 |
Source: Shiawassee County records · APN 050-668-000-030-00
Assessment roll updated July 16, 2026 · Last verified July 2026
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| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 509 E MASON ST, OWOSSO, MI 48867-3035 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
Source: Shiawassee County records · Assessment roll updated July 16, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | Michigan |
| County | Shiawassee County |
| Municipality | Owosso City |
| Unified School District | Owosso Public Schools (KG - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $71,000 (+11.46%) | $142,000 (+11.46%) | |
| 2025 | $1,681.00 (+4.93%) Homeowner's exemption | $63,700 (+26.89%) | $127,400 (+26.89%) |
| 2023 | $1,602.00 Homeowner's exemption | $50,200 | $100,400 |
Source: FEMA National Flood Hazard Layer, Shiawassee County (26155C), updated April 12, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
Source: NPS National Register of Historic Places · August 1, 2026 release · Last verified October 2026
| Historic District | Within the Mason Street Historic Residential District listed 1980 · 37 contributing resources · NRIS 80001900 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
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