171 Cognewaugh Rd, Cos Cob, CT 06807 Property Records

Greenwich Town property record for 171 Cognewaugh Rd, Cos Cob, CT 06807

Property Summary

Property Type	Single Family Home
Details	3 bd · 4 ba · 3,007 sqft · built 1800
Lot Size	2.15 acres (93,654 sqft)
Owner	2 Individual Names on File
Tax Bill	$35,442 (2026)
Deeds & Mortgages	Apr 2021 Mortgage Apr 2018 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`08-2721`

Property Details

APN / Parcel Number

Primary APN	`08-2721`
Alternative APNs	`GREE M:08 B:2721` `381/048`

Interior

Bedrooms	3 Beds
Full Baths	4 Baths
Total Rooms	9 Rooms
Stories	3 Stories
Building Area	3,007 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1800
Effective Year Built	Effective 1800
Architectural Style	Colonial
Exterior Material	Wood Siding
Construction Type	Frame
Roof Type	Gable
Roof Material	Asphalt
Lot Area	93,654 sqft (2.15 acres)
Garage Type	Attached
Parking Spaces	1 Parking Space
Pool Type	Pool with Hot Tub/Spa
Deck Area	Deck Area
Total Buildings	2 Buildings

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Hot Water
Heating Fuel	Oil

Location & Zoning

Account Number	381/048
Street Address	171 COGNEWAUGH RD
City	COS COB
State	CT
Zip	06807-1505
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	RA-2
Legal Block	2721
Jurisdiction	GREENWICH CT
Township / Civil Division	GREENWICH
Census Block Group	3
Census Block	3005
Census Tract	10202

Owner

171 Cognewaugh Rd is owned and occupied by two individuals who acquired it in April 2018.

Source: Greenwich Town records, as of October 21, 2026

Owner of Record	2 Individual Names on File
Mailing Address	171 COGNEWAUGH RD, COS COB, CT 06807-1505
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

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
Apr 27, 2021	Deed of Trust, Mortgage · Balloon Mortgage FIRST REPUBLIC BANK
Apr 23, 2018	Warranty Deed, Transfer FIRST REPUBLIC BANK

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 23, 2018
Deed Sale	Apr 23, 2018
Deed Document Number	20182737
Deed Book / Page	7373 / 342
Record Updated	Oct 29, 2026

April 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	GREENWICH CT
Property Address	171 COGNEWAUGH RD, COS COB, CT 06807-1505
Transaction Type	Mortgage
Record Updated	May 13, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	7875-139
Date	Apr 27, 2021
Book Page	7875/139
Instrument	4356

Lender

Name	FIRST REPUBLIC BANK
Type	Bank

Agreement

Type	Balloon Mortgage
Amount	Amount on Record
Term	361 Months
Due	May 1, 2051

April 2018: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	GREENWICH CT
Recording Date	Apr 23, 2018
Property Address	171 COGNEWAUGH RD, COS COB, CT 06807-1505
Document Number	7373-342
Book / Page	7373 / 342
Instrument	2737
Transaction Type	Transfer
Record Updated	May 21, 2021

Transaction

Tax	$168.58
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants

Mortgage

Document Number	73740001
Date	Apr 23, 2018
Instrument	07374/0001

Lender

Name	FIRST REPUBLIC BANK
Type	Bank

Agreement

Amount	Amount on Record
Term	360 Months
Due	Apr 23, 2048

Interest

Max Rate At Change	50.1%

Tax Assessment & Valuation

The 2026 property tax bill for 171 Cognewaugh Rd was $35,442, up 3.9% from the year before.

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	$35,442.00 (+3.91%)	$3,500,420 (+23.57%) Land $824,810 Building $2,675,610	$5,704,176 (+187.66%)
2025	$34,107.00	$2,832,830 Land $634,410 Building $2,198,420	$1,982,981 Land $444,087 Building $1,538,894
2024	$34,107.00 (+11.97%)
2023	$30,462.00 (+0.98%)	$2,674,420 (-) Land $634,410 Building $2,040,010
2022	$30,167.00	$2,674,420 Land $634,410 Building $2,040,010

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

Flood

FEMA maps place 171 Cognewaugh Rd in Zone X, an area of minimal flood risk.

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

Wildfire risk around 171 Cognewaugh Rd is low, with less than a 0.01% annual chance of wildfire.

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

Wildfire Risk	Low lower than 94% of the US · lower than 90% of Connecticut
Wildfire Likelihood	Under 0.01% annual chance
Exposure	None beyond ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Internet Providers

Source: FCC Broadband Data Collection, based on 250 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Optimum Fiber · Cable	8,000 / 8,000
Verizon Fiber · Fixed Wireless in parts of the area	980 / 880

May also be available: Frontier.

Cell Coverage

5G and 4G LTE (outdoors only)

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