307 Cognewaugh Rd, Cos Cob, CT 06807 Property Records

Greenwich Town property record for 307 Cognewaugh Rd, Cos Cob, CT 06807

Property Summary

Property Type	Single Family Home
Details	5 bd · 5.5 ba · 7,791 sqft · built 2022
Lot Size	4.08 acres (177,725 sqft)
Owner	2 Individual Names on File
Last Sale	$899,000 (Dec 2020)
Tax Bill	$45,356 (2026)
Deeds & Mortgages	Jun 2025 Line of Credit Jul 2022 Refinance + 2 more
Flood Zone	Zone X (minimal risk)
APN	`08-2316`

Property Details

APN / Parcel Number

Primary APN	`08-2316`
Alternative APNs	`GREE M:08 B:2316` `379/025`

Interior

Bedrooms	5 Beds
Full Baths	5.5 Baths
Half Baths	1 Half Bath
Total Rooms	14 Rooms
Stories	2 Stories
Building Area	7,791 sqft Living Area
Basement Area	4,161 sqft
Unfinished Basement	4,161 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 2022
Effective Year Built	Effective 2022
Architectural Style	Colonial
Exterior Material	Wood Siding
Construction Type	Frame
Roof Type	Gable
Roof Material	Asphalt
Lot Area	177,725 sqft (4.08 acres)
Garage Type	Attached
Parking Spaces	1 Parking Space
Pool Type	Spa / Hot Tub (No Pool)

Utilities, Heating & Cooling

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

Location & Zoning

Account Number	379/025
Street Address	307 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	2316
Jurisdiction	GREENWICH CT
Township / Civil Division	GREENWICH
Census Block Group	1
Census Block	1002
Census Tract	10202

Owner

307 Cognewaugh Rd is owned and occupied by two individuals who bought it in December 2020.

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

Owner of Record	2 Individual Names on File
Mailing Address	307 COGNEWAUGH RD, COS COB, CT 06807-1310
Occupancy	Owner Occupied
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.

Deeds, Mortgages & Sale History

Date	Document
Jun 11, 2025	Deed of Trust, Mortgage · Line of Credit UBS BANK USA
Jul 28, 2022	Deed of Trust, Mortgage · Stand-Alone Refinance FIRST BANK OF GREENWICH
Oct 29, 2021	Deed of Trust, Mortgage · Stand-Alone Refinance FIRST BANK OF GREENWICH
Dec 21, 2020	Warranty Deed, Transfer · Stand-Alone First Mortgage UBS BANK USA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Dec 21, 2020 · Amount on File
Deed Sale	Dec 21, 2020 · Amount on File
Deed Document Number	202011570
Deed Book / Page	7796 / 137
Record Updated	Oct 29, 2026

June 2025: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	GREENWICH CT
Property Address	307 COGNEWAUGH RD, COS COB, CT 06807-1310
Transaction Type	Mortgage
Record Updated	Mar 13, 2026

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	008444-329
Date	Jun 11, 2025
Book Page	8444/329
Instrument	3115

Lender

Name	UBS BANK USA
Type	Bank

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	361 Months
Due	Jul 1, 2055

Interest

Rate Type	Adjustable Rate
Rate	6.13%
Type Change Date	Jun 1, 2030
Index	Other
Margin	3

July 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	GREENWICH CT
Property Address	307 COGNEWAUGH RD, COS COB, CT 06807-1310
Transaction Type	Mortgage
Record Updated	Aug 11, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	008138-134
Date	Jul 28, 2022
Book Page	8138/134
Instrument	6916

Lender

Name	FIRST BANK OF GREENWICH

Agreement

Type	Stand-Alone Refinance
Amount	Amount on Record
Term	361 Months
Due	Aug 1, 2052

October 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	GREENWICH CT
Property Address	307 COGNEWAUGH RD, COS COB, CT 06807-1310
Transaction Type	Mortgage
Record Updated	Nov 11, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	8000-71
Date	Oct 29, 2021
Book Page	8000/71
Instrument	12232

Lender

Name	FIRST BANK OF GREENWICH

Agreement

Type	Stand-Alone Refinance
Amount	Amount on Record
Term	373 Months
Due	Nov 1, 2052

December 2020: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	GREENWICH CT
Recording Date	Dec 21, 2020
Property Address	307 COGNEWAUGH RD, COS COB, CT 06807-1310
Document Number	7796-137
Book / Page	7796 / 137
Instrument Date	Dec 11, 2020
Instrument	11570
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	25 SPEZZANO DR, RIVERSIDE, CT 06878-1320

Mortgage

Document Number	11571
Date	Dec 21, 2020
Instrument	11571

Lender

Name	UBS BANK USA
Type	Bank

Agreement

Type	Stand-Alone First Mortgage
Amount	Amount on Record

Interest

Rate Type	Adjustable Rate
Rate	2.38%
Type Change Date	Jan 1, 2024
Max Rate At Change	3%
Index	Other
Margin	3

Tax Assessment & Valuation

The 2026 property tax bill for 307 Cognewaugh Rd was $45,356, up 25.7% 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	$45,356.00 (+25.73%)	$4,479,580 (+49.51%) Land $973,770 Building $3,505,810	$3,056,575 (+45.74%)
2025	$36,074.00	$2,996,140 Land $747,600 Building $2,248,540	$2,097,298 Land $523,320 Building $1,573,978
2024	$36,074.00 (+164.1%)
2023	$13,659.00 (+61.61%)	$1,199,240 (+60.05%) Land $747,600 Building $451,640
2022	$8,452.00	$749,280 Land $747,600 Building $1,680

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

Flood

FEMA maps place 307 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 307 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

Nearby Properties on Cognewaugh Rd

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures