Genesee County property record for 621 Thayer St, Flint, MI 48503
| Property Type | Single Family Home |
|---|---|
| Details | 1 ba · 1,700 sqft · built 1900 |
| Lot Size | 0.163 acres (7,100 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $750 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 40-13-402-013 |
| Primary APN | 40-13-402-013 |
|---|
| Full Baths | 1 Bath |
|---|---|
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 1,700 sqft Living Area |
| 1st Floor Area | 950 sqft |
| Basement Area | 750 sqft |
| Unfinished Basement | 750 sqft |
| Year Built | Built 1900 |
|---|---|
| Effective Year Built | Effective 1900 |
| Exterior Material | Brick |
| Lot Area | 7,100 sqft (0.163 acres) |
| Lot Dimensions | 161 ft deep x 44.2 ft wide |
| Garage Type | Detached |
| Garage Area | 360 sqft |
| Porch | Porch |
| Porch Area | 240 sqft |
| Heating System | Forced Air with A/C |
|---|
| Street Address | 621 THAYER ST |
|---|---|
| City | FLINT |
| State | MI |
| Zip | 48503-5515 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | MR-1 |
| Legal Description | WEST FLINT COM AT A PT ON THE E LINE OF THAYER ST 220.6 FT M OR L, SLY FROM THE S LINE OF W SECOND ST; TH SLY ON THE E LINE |
| Legal Subdivision | WEST FLINT |
| Legal Block | 8 |
| Legal Lot Number | 8 |
| Jurisdiction | GENESEE MI |
| Township / Civil Division | FLINT |
| Census Block Group | 3 |
| Census Block | 3012 |
| Census Tract | 3700 |
621 Thayer St is owned and occupied by an individual.
Source: Genesee County records, as of October 2, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 621 THAYER ST, FLINT, MI 48503-5515 |
| 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 | Name on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 621 Thayer St was $750 with a homeowner's exemption, up 1.5% from the year before.
Source: Genesee County assessment roll, as of October 2, 2026
| Type | Name |
|---|---|
| State | Michigan |
| County | Genesee County |
| Municipality | Flint City |
| Unified School District | Flint City School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $34,100 (+16.78%) | $68,200 (+16.78%) | |
| 2025 | $750.00 (+1.49%) Homeowner's exemption | $29,200 | $58,400 |
| 2024 | $739.00 | ||
| 2023 | $22,000 | $44,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 621 Thayer St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective February 19, 2024
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 621 Thayer St 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 95% of Michigan |
|---|---|
| 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 | CITY OF FLINT serves 81,252 people · EPA ID MI0002310 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Jan 2026 |
| Lead | 3 ppb (2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | Lead service line inventory Oct 2024 |
| 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.
Source: FCC Broadband Data Collection, based on 160 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: AT&T.
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