New Haven City property record for 33 William St, New Haven, CT 06511
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 3 ba · 1,768 sqft · built 1900 |
| Lot Size | 0.07 acres (3,049 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $8,691 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 209 0591 00400 |
| Primary APN | 209 0591 00400 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 8 Rooms |
| Units | 2 Units |
| Stories | 2 Stories |
| Building Area | 1,768 sqft Living Area |
| Gross Area | 3,420 sqft |
| 1st Floor Area | 916 sqft |
| Basement Area | 916 sqft |
| Unfinished Basement | 916 sqft |
| Game Room | Game Room |
| Year Built | Built 1900 |
|---|---|
| Effective Year Built | Effective 1982 |
| Architectural Style | Duplex Single |
| Exterior Material | Aluminum/Vinyl |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 3,049 sqft (0.07 acres) |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Oil |
| Account Number | 209 0591 00400 |
|---|---|
| Street Address | 33 WILLIAM ST |
| City | NEW HAVEN |
| State | CT |
| Zip | 06511-4930 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | RM2 |
| Legal Block | 591 |
| Legal Lot Number | 400 |
| Jurisdiction | NEW HAVEN CT |
| Township / Civil Division | NEW HAVEN |
| Census Block Group | 1 |
| Census Block | 1014 |
| Census Tract | 142100 |
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 | Individual Name on File |
|---|---|
| Mailing Address | 33 WILLIAM ST, NEW HAVEN, CT 06511-4930 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
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 | $8,691.00 (+1.42%) | $217,490 (-) Land $97,370 Building $120,120 | $383,478 (+151.89%) |
| 2025 | $8,569.00 | $217,490 (-) Land $97,370 Building $120,120 | $152,243 Land $68,159 Building $84,084 |
| 2024 | $8,569.00 (+5.91%) | ||
| 2023 | $8,091.00 (-6.41%) | $217,490 (-) Land $97,370 Building $120,120 | |
| 2022 | $8,645.00 | $217,490 Land $97,370 Building $120,120 |
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 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.
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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