Dane County property record for 1145 Williamson St, Madison, WI 53703
| Property Type | Duplex |
|---|---|
| Details | 2 bd · 2 ba · 1,120 sqft · built 1874 |
| Lot Size | 0.074 acres (3,232 sqft) |
| Owner | Company Name on File |
| Last Sale | $370,000 (May 2025) |
| Tax Bill | $6,332 (2024) |
| Deeds & Mortgages | Jun 2020 Mortgage Oct 2018 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 0709-131-2525-3 |
| Primary APN | 0709-131-2525-3 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Units | 2 Units |
| Stories | 2 Stories |
| Building Area | 1,120 sqft Living Area |
| 1st Floor Area | 638 sqft |
| 2nd Floor Area | 482 sqft |
| Basement Area | 300 sqft |
| Family Room | Family Room |
| Interior Walls | Plaster |
| Year Built | Built 1874 |
|---|---|
| Effective Year Built | Effective 1971 |
| Architectural Style | Traditional |
| Exterior Material | Composition/Composite |
| Foundation Type | Stone |
| Roof Material | Asphalt |
| Lot Area | 3,232 sqft (0.074 acres) |
| Lot Dimensions | 132 ft deep x 24.5 ft wide |
| Sewer | Municipal |
|---|---|
| Water Source | Commercial |
| Street Address | 1145 WILLIAMSON ST |
|---|---|
| City | MADISON |
| State | WI |
| Zip | 53703-4353 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | HIS-TL, TR-V2 |
| Legal Description | ORIGINAL PLAT, AKA FARWELLS REPLAT, BLKS 182 & 183, NE 24 1/2 FT OF SW 49 FT OF LOT 8 |
| Legal Range | 09 |
| Legal Township | 07 |
| Legal Section | 13 |
| Legal Subdivision | ORIGINAL PLAT, AKA FARWELLS REPLAT, BLKS |
| Legal Block | 182 |
| Legal Lot Number | 8 |
| Jurisdiction | DANE WI |
| Township / Civil Division | MADISON |
| Census Block Group | 3 |
| Census Block | 3019 |
| Census Tract | 1901 |
1145 Williamson St, a duplex, is owned by a company that bought it in May 2025.
Source: Dane County records, as of January 22, 2026
| Owner of Record | Company Name on File |
|---|---|
| Owner Type | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Jun 15, 2020 | Deed of Trust, Mortgage · Commercial Mortgage MONONA STATE BANK |
| Oct 2, 2018 | Quit Claim Deed, Transfer · Commercial Mortgage Quitclaim |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | May 21, 2025 · Amount on File |
| Deed Sale | May 21, 2025 · Amount on File |
| Prior Sale | Oct 2, 2018 |
| Deed Document Number | 6028840 |
| Record Updated | Jun 8, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | DANE WI |
| Property Address | 1145 WILLIAMSON ST, MADISON, WI 53703-4353 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0005600912 |
|---|---|
| Date | Jun 15, 2020 |
| Instrument | 5600912 |
| Name | MONONA STATE BANK |
|---|---|
| Type | Bank |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
| Rate Type | Fixed Rate |
|---|
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | DANE WI |
| Recording Date | Oct 2, 2018 |
| Property Address | 1145 WILLIAMSON ST, MADISON, WI 53703-4353 |
| Document Number | 0005445075 |
| Instrument Date | Oct 1, 2018 |
| Instrument | 5445075 |
| Transaction Type | Transfer |
| Record Updated | Feb 6, 2021 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|
| Document Number | 0005445076 |
|---|---|
| Date | Oct 2, 2018 |
| Instrument | 5445076 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
| Rate Type | Fixed Rate |
|---|
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 | $362,400 Land $123,200 Building $239,200 | ||
| 2024 | $6,332.00 | $362,400 | |
| 2023 | $302,000 Land $123,200 Building $178,800 | ||
| 2022 | $5,455.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 1145 Williamson 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 | 5 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.
The area around 1145 Williamson St has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 427 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 · Fiber in parts of the area | 1,000 / 1,000 |
| Verizon Fixed Wireless | 1,000 / 75 |
| LiteWire Fixed Wireless · Fiber in parts of the area | 100 / 25 |
| T-Mobile Fixed Wireless | 100 / 20 |
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