311 Cognewaugh Rd, Cos Cob, CT 06807 Property Records

Greenwich Town property record for 311 Cognewaugh Rd, Cos Cob, CT 06807

Property Summary

Property Type	Single Family Home
Details	6 bd · 5 ba · 5,040 sqft · built 1975
Lot Size	0.78 acres (33,977 sqft)
Owner	Individual Name on File
Last Sale	$2,675,000 (May 2024)
Tax Bill	$20,077 (2026)
Deeds & Mortgages	May 2024 Sale Dec 2018 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`08-2858`

Property Details

APN / Parcel Number

Primary APN	`08-2858`
Alternative APNs	`GREE M:08 B:2858` `379/024`

Interior

Bedrooms	6 Beds
Full Baths	5 Baths
Half Baths	2 Half Baths
Total Rooms	12 Rooms
Stories	2 Stories
Building Area	5,040 sqft Living Area
Attic	Attic
Attic Area	498 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1975
Effective Year Built	Effective 1985
Architectural Style	Cape Cod
Exterior Material	Aluminum/Vinyl
Construction Type	Frame
Roof Type	Gable
Roof Material	Asphalt
Lot Area	33,977 sqft (0.78 acres)
Garage Type	Attached
Parking Spaces	1 Parking Space
Pool Type	In-Ground Pool

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Forced Air with A/C
Heating Fuel	Gas

Location & Zoning

Account Number	379/024
Street Address	311 COGNEWAUGH RD
City	COS COB
State	CT
Zip	06807-1310
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	RA-2
Legal Block	2858
Jurisdiction	GREENWICH CT
Township / Civil Division	GREENWICH
Census Block Group	1
Census Block	1002
Census Tract	10202

Owner

311 Cognewaugh Rd is owned and occupied by an individual who bought it in May 2024.

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

Owner of Record	Individual Name on File
Mailing Address	311 COGNEWAUGH RD, COS COB, CT 06807-1310
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Individual(s)

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
May 31, 2024	Warranty Deed, Transfer
Dec 4, 2018	Warranty Deed, Transfer · Stand-Alone First Mortgage FIELDPOINT PRIVATE BANK & TRUST

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	May 31, 2024 · Amount on File
Deed Sale	May 31, 2024 · Amount on File
Prior Sale	Dec 4, 2018 · Amount on File
Deed Document Number	20242634
Deed Book / Page	8326 / 56
Record Updated	Oct 29, 2026

May 2024: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	GREENWICH CT
Recording Date	May 31, 2024
Property Address	311 COGNEWAUGH RD, COS COB, CT 06807-1310
Document Number	0008326-56
Book / Page	8326 / 56
Instrument Date	May 22, 2024
Instrument	2634
Transaction Type	Transfer
Record Updated	Jun 13, 2024

Transaction

Amount	Amount 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	311 COGNEWAUGH RD, COS COB, CT 06807-1310

December 2018: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	GREENWICH CT
Recording Date	Dec 4, 2018
Property Address	311 COGNEWAUGH RD, COS COB, CT 06807-1310
Document Number	7455-69
Book / Page	7455 / 69
Instrument Date	Dec 3, 2018
Instrument	9001
Transaction Type	Transfer
Record Updated	May 21, 2021

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
Relationship	Joint Tenants
Address	311 COGNEWAUGH RD, COS COB, CT 06807-1310

Mortgage

Document Number	9002
Date	Dec 4, 2018
Instrument	9002

Lender

Name	FIELDPOINT PRIVATE BANK & TRUST

Agreement

Type	Stand-Alone First Mortgage
Amount	Amount on Record

Tax Assessment & Valuation

The 2026 property tax bill for 311 Cognewaugh Rd was $20,077, up 34.8% 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	$20,077.00 (+34.76%)	$1,982,960 (+60.25%) Land $678,650 Building $1,304,310	$2,978,384 (+243.86%)
2025	$14,898.00	$1,237,390 Land $503,300 Building $734,090	$866,173 Land $352,310 Building $513,863
2024	$14,898.00 (+16.02%)
2023	$12,841.00 (-0.48%)	$1,127,420 (-1.44%) Land $503,300 Building $624,120
2022	$12,903.00	$1,143,870 Land $503,300 Building $640,570

Assessed value is set for property tax purposes, not a market price estimate; it is a fraction of this property's market value.

Flood

FEMA maps place 311 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 311 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 89% of Connecticut
Wildfire Likelihood	Under 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

4G LTE (outdoors only), no 5G reported

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