New Haven City property record for 21 Mill River St, New Haven, CT 06511
| Property Type | Commercial Vacant Land |
|---|---|
| Details | 900 sqft · built 1900 |
| Lot Size | 0.194 acres (8,470 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $3,264 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 181 0589 00400 |
| Primary APN | 181 0589 00400 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 900 sqft Total Area |
| 1st Floor Area | 900 sqft |
| Year Built | Built 1900 |
|---|---|
| Effective Year Built | Effective 1900 |
| Exterior Material | Combination |
| Construction Type | Masonry / Concrete Block |
| Roof Type | Flat |
| Roof Material | Tar & Gravel |
| Lot Area | 8,470 sqft (0.194 acres) |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Oil |
| Account Number | 181 0589 00400 |
|---|---|
| Street Address | 21 MILL RIVER ST |
| City | NEW HAVEN |
| State | CT |
| Zip | 06511 |
| Property Category | Commercial |
| Property Type | Vacant Land > Commercial |
| Local Zoning Code | RM2 |
| Legal Block | 589 |
| Legal Lot Number | 400 |
| Jurisdiction | NEW HAVEN CT |
| Township / Civil Division | NEW HAVEN |
| Census Block Group | 1 |
| Census Block | 1012 |
| Census Tract | 142100 |
21 Mill River St, commercial vacant land, is owned by an individual.
Source: New Haven City records, as of October 20, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 27 MILL RIVER ST, NEW HAVEN, CT 06511-5022 |
| Owner Type | Individual |
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 | Name on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 21 Mill River St was $3,264, 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 | $3,264.00 (+1.4%) | $81,690 (-) Land $69,860 Building $11,830 | |
| 2025 | $3,219.00 | $81,690 Land $69,860 Building $11,830 | $116,700 Land $99,800 Building $16,900 |
| 2024 | $3,219.00 (+5.92%) | ||
| 2023 | $3,039.00 (-6.41%) | $81,690 (-) Land $69,860 Building $11,830 | |
| 2022 | $3,247.00 | $81,690 Land $69,860 Building $11,830 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 21 Mill River St in Zone X, an area of minimal flood risk, within 100 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective January 25, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| 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 21 Mill River 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 390 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 |
May also be available: AT&T, GoNetspeed, T-Mobile.
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