Dane County property record for 109 Koster St, Madison, WI 53713
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 912 sqft · built 1969 |
| Lot Size | 0.244 acres (10,633 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $5,429 (2025) |
| Deeds & Mortgages | Aug 2022 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 0709-351-1403-6 |
| Primary APN | 0709-351-1403-6 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 912 sqft Living Area |
| Gross Area | 1,824 sqft |
| 1st Floor Area | 912 sqft |
| Basement Area | 912 sqft |
| Flooring | Wood |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1969 |
|---|---|
| Effective Year Built | Effective 1970 |
| Architectural Style | Ranch |
| Exterior Material | Wood |
| Roof Material | Asphalt |
| Lot Area | 10,633 sqft (0.244 acres) |
| View / Lot | Traffic |
| Driveway | Gravel Driveway |
| Driveway Area | 56 sqft |
| Cooling System | Central |
|---|---|
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 109 KOSTER ST |
|---|---|
| City | MADISON |
| State | WI |
| Zip | 53713-1401 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | TR-C1 |
| Legal Description | CAPITOL VIEW HTS PLAT, LOT 19 |
| Legal Range | 09E |
| Legal Township | 07N |
| Legal Section | 35 |
| Legal Quarter | 1 |
| Legal Subdivision | CAPITOL VIEW HTS PLAT |
| Legal Lot Number | 19 |
| Jurisdiction | DANE WI |
| Township / Civil Division | MADISON |
| Census Block Group | 4 |
| Census Block | 4023 |
| Census Tract | 1401 |
109 Koster St is owned and occupied by an individual who acquired it in August 2022.
Source: Dane County records, as of March 16, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 109 KOSTER ST, MADISON, WI 53713-1401 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Aug 22, 2022 |
| Transfer Doc | 0005858259 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | DANE WI |
| Recording Date | Aug 26, 2022 |
| Property Address | 109 KOSTER ST, MADISON, WI 53713-1401 |
| Document Number | 0005858259 |
| Instrument Date | Aug 22, 2022 |
| Instrument | 5858259 |
| Transaction Type | Transfer |
| Record Updated | Sep 14, 2022 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 109 KOSTER ST, MADISON, WI 53713-1401 |
The 2025 property tax bill for 109 Koster St was $5,429, up 14.7% from the year before.
Source: Dane County assessment roll, as of March 16, 2026
| Type | Name |
|---|---|
| State | Wisconsin |
| County | Dane County |
| Municipality | Madison City |
| Unified School District | Madison Metropolitan School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $5,429.00 (+14.66%) Homeowner's exemption | $281,800 Land $71,300 Building $210,500 | |
| 2024 | $4,735.00 | $256,200 (+8.41%) | |
| 2023 | $235,000 Land $65,400 Building $169,600 | $236,323 | |
| 2022 | $4,873.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 109 Koster St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 20, 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 |
| Nearby Flood Policies | 2 in force |
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 109 Koster 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 99.1% of the US · lower than 97.9% of Wisconsin |
|---|---|
| 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 | MADISON WATER UTILITY serves 272,000 people · EPA ID WI1130224 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Apr 2023 |
| Lead | 2 ppb (2023) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | Lead service line inventory Oct 2024 |
| Monitoring and Reporting | 1 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 342 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 |
| LiteWire Fixed Wireless | 100 / 25 |
May also be available: AT&T, Four Lakes Broadband, T-Mobile, Verizon.
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