New Haven City property record for 73 William St, New Haven, CT 06511
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 4 ba · 2,957 sqft · built 1900 |
| Lot Size | 0.153 acres (6,671 sqft) |
| Owner | Company Name on File |
| Last Sale | $155,000 (Aug 2019) |
| Tax Bill | $10,221 (2026) |
| Deeds & Mortgages | Jan 2022 Refinance |
| Flood Zone | Zone X (minimal risk) |
| APN | 209 0590 01600 |
| Primary APN | 209 0590 01600 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 11 Rooms |
| Units | 2 Units |
| Stories | 2 Stories |
| Building Area | 2,957 sqft Living Area |
| Gross Area | 5,189 sqft |
| 1st Floor Area | 1,515 sqft |
| Basement Area | 1,515 sqft |
| Unfinished Basement | 1,515 sqft |
| Year Built | Built 1900 |
|---|---|
| Effective Year Built | Effective 1986 |
| Architectural Style | Duplex Single |
| Exterior Material | Aluminum/Vinyl |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 6,671 sqft (0.153 acres) |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Gas |
| Account Number | 209 0590 01600 |
|---|---|
| Street Address | 73 WILLIAM ST |
| City | NEW HAVEN |
| State | CT |
| Zip | 06511-4940 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | RM2 |
| Legal Block | 590 |
| Legal Lot Number | 1600 |
| Jurisdiction | NEW HAVEN CT |
| Township / Civil Division | NEW HAVEN |
| Census Block Group | 1 |
| Census Block | 1014 |
| Census Tract | 142100 |
73 William St, a duplex, is owned by a company that bought it in August 2019.
Source: New Haven City records, as of October 20, 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 | Company Name on File |
|---|---|
| Mailing Address | 373 HUMPHREY ST, NEW HAVEN, CT 06511-3934 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 19, 2019 · Amount on File |
| Deed Sale | Aug 19, 2019 · Amount on File |
| Prior Sale | Jun 1, 2010 · Amount on File |
| Deed Document Number | 20197693 |
| Deed Book / Page | 9896 / 80 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | NEW HAVEN CT |
| Property Address | 73 WILLIAM ST, NEW HAVEN, CT 06511-4940 |
| Transaction Type | Mortgage |
| Record Updated | Aug 22, 2023 |
| Name | Verified Name |
|---|
| Document Number | 010323-215 |
|---|---|
| Date | Jan 31, 2022 |
| Book Page | 10323/215 |
| Instrument | 2022-00939 |
| Name | STRONGHILL CAPITAL LLC |
|---|
| Type | Stand-Alone Refinance |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Feb 1, 2052 |
The 2026 property tax bill for 73 William St was $10,221, up 1.4% from the year before.
Source: New Haven City assessment roll, as of September 25, 2026
| Type | Name |
|---|---|
| State | Connecticut |
| County Subdivision / Municipality | New Haven City |
| Unified School District | New Haven School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $10,221.00 (+1.42%) | $255,780 (-) Land $130,340 Building $125,440 | $566,212 (+216.24%) |
| 2025 | $10,078.00 | $255,780 Land $130,340 Building $125,440 | $179,046 Land $91,238 Building $87,808 |
| 2024 | $10,078.00 (+5.92%) | ||
| 2023 | $9,515.00 (-6.41%) | $255,780 (-) Land $130,340 Building $125,440 | |
| 2022 | $10,167.00 | $255,780 Land $130,340 Building $125,440 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 73 William St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective January 25, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 73 William 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 | REGIONAL WATER AUTHORITY serves 418,900 people · EPA ID CT0930011 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jun 2024 |
| Lead | Under 1 ppb (2026) 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 346 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Frontier Fiber | 7,000 / 7,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: T-Mobile.
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