Dane County property record for 503 S Prospect Ave, Madison, WI 53711
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 2,038 sqft · built 1926 |
| Lot Size | 0.17 acres (7,444 sqft) |
| Owner | 2 Owner Names on File |
| Last Sale | $345,000 (Sep 2008) |
| Tax Bill | $11,752 (2024) |
| Flood Zone | Zone X (minimal risk) |
| APN | 0709-223-1502-7 |
| Primary APN | 0709-223-1502-7 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 11 Rooms |
| Stories | 3 Stories |
| Building Area | 2,038 sqft Living Area |
| 1st Floor Area | 854 sqft |
| 2nd Floor Area | 834 sqft |
| Attic Area | 208 sqft |
| Basement Area | 778 sqft |
| Finished Basement | 350 sqft |
| Family Room | Family Room |
| Flooring | Wood |
| Interior Walls | Plaster |
| Year Built | Built 1926 |
|---|---|
| Effective Year Built | Effective 1963 |
| Architectural Style | Traditional |
| Exterior Material | Aluminum/Vinyl |
| Foundation Type | Concrete |
| Roof Material | Asphalt |
| Lot Area | 7,444 sqft (0.17 acres) |
| Garage Type | Detached |
| Garage Area | 360 sqft |
| Driveway | Driveway |
| Driveway Area | 142 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Enclosed Porch |
| Porch Area | 156 sqft |
| Patio Area | 112 sqft |
| Sewer | Municipal |
|---|---|
| Water Source | Commercial |
| Street Address | 503 S PROSPECT AVE |
|---|---|
| City | MADISON |
| State | WI |
| Zip | 53711-1941 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | TR-C2 |
| Legal Description | PLAT OF WEST LAWN, LOT 12, BLOCK 17 |
| Legal Range | 09 |
| Legal Township | 07 |
| Legal Section | 22 |
| Legal Subdivision | PLAT OF WEST LAWN |
| Legal Block | 17 |
| Legal Lot Number | 12 |
| Jurisdiction | DANE WI |
| Township / Civil Division | MADISON |
| Census Block Group | 2 |
| Census Block | 2004 |
| Census Tract | 901 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the West Lawn Heights Historic District listed 1998 · 378 contributing resources · NRIS 98000223 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
The current owner of 503 S Prospect Ave bought it in September 2008.
Source: Dane County records, as of January 22, 2026
| Owner of Record | 2 Owner Names on File |
|---|---|
| Mailing Address | 503 S PROSPECT AVE, MADISON, WI 53711-1941 |
| Occupancy | Owner Occupied |
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 | 2 Names on Deed |
|---|---|
| Last Sale | Sep 25, 2008 · Amount on File |
| Deed Sale | Sep 25, 2008 · Amount on File |
| Deed Document Number | 4470035 |
| Record Updated | Jun 8, 2026 |
Source: Dane County assessment roll, as of January 1, 2025
| 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 | $683,800 Land $228,400 Building $455,400 | ||
| 2024 | $11,752.00 | $683,800 | |
| 2023 | $621,600 Land $207,600 Building $414,000 | ||
| 2022 | $10,733.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 503 S Prospect Ave 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 | 3 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 503 S Prospect 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 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 692 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
| Verizon Fixed Wireless | 1,000 / 75 |
| LiteWire Fixed Wireless | 100 / 25 |
May also be available: Four Lakes Broadband, T-Mobile.
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