Dane County property record for 307 Koster St, Madison, WI 53713
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,212 sqft · built 1918 |
| Lot Size | 0.635 acres (27,652 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $5,034 (2025) |
| Deeds & Mortgages | Jan 2026 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 0709-351-1102-4 |
| Primary APN | 0709-351-1102-4 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 1,212 sqft Living Area |
| Gross Area | 1,788 sqft |
| 1st Floor Area | 636 sqft |
| 2nd Floor Area | 576 sqft |
| Basement Area | 576 sqft |
| Family Room | Family Room |
| Flooring | Carpet |
| Interior Walls | Plaster |
| Year Built | Built 1918 |
|---|---|
| Effective Year Built | Effective 1974 |
| Architectural Style | Old Style |
| Exterior Material | Stucco |
| Roof Material | Asphalt |
| Lot Area | 27,652 sqft (0.635 acres) |
| View / Lot | Traffic |
| Driveway | Gravel Driveway |
| Driveway Area | 161 sqft |
| Porch | Open Frame Porch |
|---|---|
| Porch Area | 198 sqft |
| Deck Area | 72 sqft |
| Patio Area | 72 sqft |
| Cooling System | Window A/C |
|---|---|
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 307 KOSTER ST |
|---|---|
| City | MADISON |
| State | WI |
| Zip | 53713-1405 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | WP-18 |
| Legal Description | HAMMERSLEY HEIGHTS, PRT LOT 26 DESC AS FOL, BEG AT NW COR LOT 26, TH SLY ALG W L OT LN 230.8 FT, TH ELY PARA TO S LOT LN 92.3 FT, TH NLY PARA TO W LN 176.3 FT, T H NWLY ALG NE LOT LN 108 FT TO POB ALSO PRT OF LOT 2, CSM 7112, RECORDED IN DANE COUNTY |
| Legal Range | 09E |
| Legal Township | 07N |
| Legal Section | 35 |
| Legal Quarter | 1 |
| Legal Subdivision | HAMMERSLEY HEIGHTS |
| Legal Lot Number | 26 |
| Jurisdiction | DANE WI |
| Township / Civil Division | MADISON |
| Census Block Group | 4 |
| Census Block | 4025 |
| Census Tract | 1401 |
Source: Dane County records, as of March 16, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 307 KOSTER ST, MADISON, WI 53713-1405 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Jan 5, 2026 |
| Transfer Doc | 0006073996 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | DANE WI |
| Recording Date | Jan 6, 2026 |
| Property Address | 307 KOSTER ST, MADISON, WI 53713-1405 |
| Document Number | 0006073996 |
| Map Reference | VOL 36 PG 61 |
| Instrument Date | Jan 5, 2026 |
| Instrument | 6073996 |
| Transaction Type | Transfer |
| Record Updated | Jan 20, 2026 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 307 KOSTER ST, MADISON, WI 53713-1405 |
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 | $5,034.00 (+16.93%) Homeowner's exemption | $289,400 (+1%) Land $104,000 Building $185,400 | |
| 2024 | $4,305.00 (+12.81%) Homeowner's exemption | $263,100 (+9.44%) Land $104,000 Building $159,100 | $263,100 (+8.83%) |
| 2023 | $240,400 Land $95,400 Building $145,000 | $241,754 | |
| 2022 | $3,816.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 95% of the US · lower than 88% of Wisconsin |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | Direct burnable vegetation |
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 270 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Spectrum Cable · Fiber in parts of the area | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| LiteWire Fixed Wireless | 100 / 25 |
| T-Mobile Fixed Wireless | 100 / 20 |
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