17 Benenson Dr, Cos Cob, CT 06807 Property Records

Greenwich Town property record for 17 Benenson Dr, Cos Cob, CT 06807

Property Summary

Property Type	Single Family Home
Details	4 bd · 5.5 ba · 6,409 sqft · built 1968
Lot Size	2.05 acres (89,298 sqft)
Owner	Trust Name on Record
Last Sale	$1,589,000 (Dec 2015)
Tax Bill	$23,526 (2026)
Deeds & Mortgages	Jun 2021 Mortgage May 2021 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`08A-1210S`

Property Details

APN / Parcel Number

Primary APN	`08A-1210S`
Alternative APNs	`GREE M:08A B:1210/S` `399/006`

Interior

Bedrooms	4 Beds
Full Baths	5.5 Baths
Half Baths	1 Half Bath
Total Rooms	14 Rooms
Stories	2 Stories
Building Area	6,409 sqft Living Area
Basement Area	2,112 sqft
Unfinished Basement	2,112 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1968
Effective Year Built	Effective 1968
Architectural Style	Colonial
Exterior Material	Wood Siding
Construction Type	Frame
Roof Type	Gable
Roof Material	Asphalt
Lot Area	89,298 sqft (2.05 acres)
Garage Type	Attached
Parking Spaces	1 Parking Space
Pool Type	Pool with Hot Tub/Spa
Deck Area	Deck Area

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Hot Water
Heating Fuel	Gas

Location & Zoning

Account Number	399/006
Street Address	17 BENENSON DR
City	COS COB
State	CT
Zip	06807-1401
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	RA-2
Legal Block	1210/S
Jurisdiction	GREENWICH CT
Township / Civil Division	GREENWICH
Census Block Group	1
Census Block	1002
Census Tract	10202

Owner

Source: Greenwich Town records, as of October 21, 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	Trust Name on Record
Mailing Address	17 BENENSON DR, COS COB, CT 06807-1401
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Jun 10, 2021	Deed of Trust, Mortgage · ARM QUICKEN LOANS INC
May 24, 2021	Deed of Trust, Mortgage · ARM QUICKEN LOANS INC
May 15, 2020	Warranty Deed, Transfer UNKNOWN

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Dec 24, 2015 · Amount on Record
Deed Sale	Dec 24, 2015 · Amount on Record
Prior Sale	Dec 2, 2011 · Amount on Record
Deed Document Number	201511985
Deed Book / Page	7005 / 6
Last Transfer Date	Mar 27, 2020
Transfer Doc	7663-335
Record Updated	Oct 29, 2026

June 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	GREENWICH CT
Property Address	17 BENENSON DR, COS COB, CT 06807-1401
Transaction Type	Mortgage
Record Updated	Jan 17, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0007907-53
Date	Jun 10, 2021
Book Page	7907/53
Instrument	6686

Lender

Name	QUICKEN LOANS INC
Type	Lending Institution

Agreement

Type	ARM
Amount	Amount Recorded
Term	361 Months
Due	Jul 1, 2051

Interest

Rate Type	Adjustable Rate
Rate	2.88%
Type Change Date	Jun 1, 2031
Index	Other
Margin	3

May 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	GREENWICH CT
Property Address	17 BENENSON DR, COS COB, CT 06807-1401
Transaction Type	Mortgage
Record Updated	Jun 10, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	7895-43
Date	May 24, 2021
Book Page	7895/43
Instrument	5492

Lender

Name	QUICKEN LOANS INC
Type	Lending Institution

Agreement

Type	ARM
Amount	Amount Recorded
Term	361 Months
Due	Jun 1, 2051

Interest

Rate Type	Adjustable Rate
Rate	3.13%
Type Change Date	Jan 1, 2031
Index	1-Year LIBOR

May 2020: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	GREENWICH CT
Recording Date	May 15, 2020
Property Address	17 BENENSON DR, COS COB, CT 06807-1401
Document Number	7663-335
Book / Page	007663 / 000335
Instrument Date	Mar 27, 2020
Instrument	3520
Transaction Type	Transfer
Record Updated	Jun 2, 2020
Title Company	UNKNOWN

Transaction

Tax	$0.00
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Trust
Address	17 BENENSON DR COS COB CT 068071401, COS COB, CT 06807-1401

Tax Assessment & Valuation

Source: Greenwich Town assessment roll, as of June 25, 2026

Property Jurisdictions

Type	Name
State	Connecticut
County Subdivision	Greenwich Town
Unified School District	Greenwich School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026	$23,526.00 (+33.09%)	$2,243,990 (+56.89%) Land $808,780 Building $1,435,210	$3,654,015 (+264.96%)
2025	$17,677.00	$1,430,310 (-) Land $622,160 Building $808,150	$1,001,217 Land $435,512 Building $565,705
2024	$17,677.00 (+6.21%)
2023	$16,643.00 (+0.92%)	$1,430,310 (-) Land $622,160 Building $808,150
2022	$16,491.00	$1,430,310 Land $622,160 Building $808,150

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

Source: FEMA National Flood Hazard Layer, effective November 28, 2025

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

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Low lower than 80% of the US · above 55% of Connecticut
Wildfire Likelihood	0.01% annual chance
Exposure	Direct burnable vegetation

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	AQUARION-EASTERN FAIRFIELD COUNTY private · serves 351,756 people · EPA ID CT0150011
Water Source	Surface water
Last State Inspection	Jun 2025
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	24 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 115 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Optimum Fiber · Cable	8,000 / 8,000
Verizon Fiber	2,300 / 2,300

May also be available: Frontier.

Cell Coverage

5G and 4G LTE (outdoors only)

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