66 William St, New Haven, CT 06511 Property Records

New Haven City property record for 66 William St, New Haven, CT 06511

Property Summary

Property Type	Apartment House (2-4 Units)
Details	9 bd · 6 ba · 4,562 sqft · built 1900
Lot Size	0.164 acres (7,142 sqft)
Owner	Company Name on File
Last Sale	$1,350,000 (Feb 2021)
Tax Bill	$21,058 (2026)
Deeds & Mortgages	Feb 2021 Sale & Mortgage Oct 2019 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`209 0586 01700`

Property Details

APN / Parcel Number

Primary APN	`209 0586 01700`
Alternative APN	`NHVN M:209 B:0586 L:01700`

Interior

Bedrooms	9 Beds
Full Baths	6 Baths
Units	6 Units
Stories	3 Stories
Building Area	4,562 sqft Living Area
Gross Area	6,416 sqft
1st Floor Area	1,735 sqft
Basement Area	1,365 sqft
Unfinished Basement	1,365 sqft

Exterior

Year Built	Built 1900
Effective Year Built	Effective 1900
Architectural Style	Condo/Apartment
Exterior Material	Aluminum/Vinyl
Roof Type	Gable
Roof Material	Asphalt
Lot Area	7,142 sqft (0.164 acres)

Utilities, Heating & Cooling

Heating System	Hot Water
Heating Fuel	Oil

Location & Zoning

Account Number	209 0586 01700
Street Address	66 WILLIAM ST
City	NEW HAVEN
State	CT
Zip	06511-4939
Property Category	Commercial
Property Type	Residential > Multi-Unit > Apartment House (2-4 Units)
Local Zoning Code	RM2
Legal Subdivision	WILLIAM ST
Legal Block	586
Legal Lot Number	1700
Jurisdiction	NEW HAVEN CT
Township / Civil Division	NEW HAVEN
Census Block Group	1
Census Block	1015
Census Tract	142100

Owner

66 William St, a residential property, is owned by a company that bought it in February 2021.

Source: New Haven City records, as of October 20, 2026

Owner of Record	Company Name on File
Mailing Address	15 ABIGAIL ST, MILFORD, CT 06460-7918
Owner Type	Company
Vesting	Company

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Date	Document
Feb 9, 2021	Warranty Deed, Transfer · Stand-Alone First Mortgage HUDSON VALLEY FCU
Oct 7, 2019	Grant Deed, Mortgage UNION SVGS
Jul 24, 2019	Warranty Deed, Transfer UNKNOWN

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Feb 9, 2021 · Amount on File
Deed Sale	Feb 9, 2021 · Amount on File
Prior Sale	Jul 24, 2019 · Amount on File
Deed Document Number	20212021-01339
Deed Book / Page	10122 / 273
Prior Transfer Date	Feb 4, 2021
Prior Transfer Doc	10122-273
Record Updated	Oct 29, 2026

February 2021: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	NEW HAVEN CT
Recording Date	Feb 9, 2021
Property Address	66 WILLIAM ST, NEW HAVEN, CT 06511-4939
Document Number	010122-273
Book / Page	10122 / 273
Instrument Date	Feb 4, 2021
Instrument	2021-01339
Transaction Type	Transfer
Record Updated	Jul 18, 2024

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	15 ABIGAIL ST, MILFORD, CT 06460-7918

Mortgage

Document Number	0202101341
Date	Feb 9, 2021
Instrument	2021-01341

Lender

Name	HUDSON VALLEY FCU
Type	Credit Union

Agreement

Type	Stand-Alone First Mortgage
Amount	Amount on Record

October 2019: Grant Deed, Mortgage

Document Type	Grant Deed
Jurisdiction	NEW HAVEN CT
Recording Date	Oct 7, 2019
Property Address	66 WILLIAM ST, NEW HAVEN, CT 06511-4939
Book / Page	009917 / 000031
Instrument Date	Oct 3, 2019
Instrument	9206
Transaction Type	Mortgage
Record Updated	Oct 29, 2019
Title Company	UNKNOWN

Transaction

Tax	$0.00
Additional	Multiple Parcels

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	66 WILLIAM ST NEW HAVEN CT 065114939, NEW HAVEN, CT 06511-4939

Mortgage

Document Number	9917-31
Date	Oct 7, 2019
Book Page	009917/000031
Instrument	9206

Lender

Name	UNION SVGS
Type	Federal Savings Bank

Agreement

Amount	Amount on Record

July 2019: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	NEW HAVEN CT
Recording Date	Jul 24, 2019
Property Address	66 WILLIAM ST, NEW HAVEN, CT 06511-4939
Document Number	9885-164
Book / Page	009885 / 000164
Instrument Date	Jul 24, 2019
Instrument	6848
Transaction Type	Transfer
Record Updated	Aug 13, 2019
Title Company	UNKNOWN

Transaction

Amount	Amount on Record
Tax	$890.00
Amount Accuracy	Confirmed
Additional	Arm's Length Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	66 WILLIAM ST NEW HAVEN CT 065114939, NEW HAVEN, CT 06511-4939

Tax Assessment & Valuation

The 2026 property tax bill for 66 William St was $21,058, up 1.4% from the year before.

Source: New Haven City assessment roll, as of September 25, 2026

Property Jurisdictions

Type	Name
State	Connecticut
County Subdivision / Municipality	New Haven City
Unified School District	New Haven School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026	$21,058.00 (+1.43%)	$526,960 (-) Building $359,940
2025	$20,762.00	$526,960 Land $167,020 Building $359,940	$752,800 Land $238,600 Building $514,200
2024	$20,762.00 (+5.91%)
2023	$19,603.00 (-6.42%)	$526,960 (-) Land $167,020 Building $359,940
2022	$20,947.00	$526,960 Land $167,020 Building $359,940

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

FEMA maps place 66 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.

Wildfire

The area around 66 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.

Drinking Water

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

Violations Reported to EPA

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.

Internet Providers

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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