Lake County property record for 1001 S Union Ave, Madison, SD 57042
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 6 ba · 624 sqft · built 1900 |
| Lot Size | 0.34 acres (14,810 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $513 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 21780-00000-070-20 |
| Primary APN | 21780-00000-070-20 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 6 Baths |
| Stories | 1 Story |
| Building Area | 624 sqft Living Area |
| Basement Area | 624 sqft |
| Unfinished Basement | 624 sqft |
| Year Built | Built 1900 |
|---|---|
| Effective Year Built | Effective 1900 |
| Lot Area | 14,810 sqft (0.34 acres) |
| Garage Type | Detached |
| Garage Area | 308 sqft |
| Street Address | 1001 S UNION AVE |
|---|---|
| City | MADISON |
| State | SD |
| Zip | 57042-3243 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | E300' S50' N245' LOT 7 CO AUD 4TH ADD #2231M |
| Legal Subdivision | CO AUD 4TH ADD |
| Legal Lot Number | 7 |
| Jurisdiction | LAKE SD |
| Township / Civil Division | MADISON |
| Census Block Group | 2 |
| Census Block | 2082 |
| Census Tract | 960201 |
1001 S Union Ave, a single family home, is owned by an individual.
Source: Lake County records, as of September 23, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | PO BOX 94, WENTWORTH, SD 57075-0094 |
| 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 2026 property tax bill for 1001 S Union Ave was $513, down 9.7% from the year before.
Source: Lake County assessment roll, as of October 24, 2025
| Type | Name |
|---|---|
| State | South Dakota |
| County | Lake County |
| Municipality | Madison City |
| Unified School District | Madison Central School District 39-2 (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $513.00 (-9.68%) | $35,600 (-) Land $14,300 Building $21,300 | $35,600 Land $14,300 Building $21,300 |
| 2025 | $568.00 (+4.99%) | $35,600 (-) Land $14,300 Building $21,300 | |
| 2024 | $541.00 (+5.66%) | $35,600 (+8.87%) Land $14,300 Building $21,300 | |
| 2023 | $512.00 (+91.04%) | $32,700 Land $12,400 Building $20,300 | |
| 2022 | $268.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 1001 S Union Ave in Zone X, an area of minimal flood risk, though there have been 3 flood claims nearby since 2019.
Source: FEMA National Flood Hazard Layer, effective November 20, 2024 · 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 |
| Community Rating System | Class 8 (10% premium discount) |
| Nearby Flood Policies | 6 in force |
| Nearby Flood Claims | 3 (2019) |
| Most Recent Claim | Sep 2019 · Severe Storms, Tornadoes, 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.
Wildfire risk around 1001 S Union 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 96% of South Dakota |
|---|---|
| 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 | KINGBROOK III RURAL WATER SYSTEM private · serves 2,973 people · EPA ID SD4600874 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jul 2022 |
| Lead | 3 ppb (2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| 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.
Source: FCC Broadband Data Collection, based on 157 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Midco Cable | 2,000 / 350 |
| Bluepeak Cable · Fiber in parts of the area | 1,000 / 30 |
May also be available: GigFire, Interlakes Wireless, Verizon.
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