23 Frontier Rd, Cos Cob, CT 06807 Property Records

Greenwich Town property record for 23 Frontier Rd, Cos Cob, CT 06807 · Last verified July 2026

Property Summary

Property Type	Single Family Home
Details	5 bd · 4.5 ba · 3,444 sqft · built 1969
Lot Size	1.05 acres (45,738 sqft)
Owner	2 Individual Names on File
Last Sale	$1,470,000 (Sep 2021)
Tax Bill	$11,721 (2025)
Deeds & Mortgages	Sep 2021 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`08-3579`

Property Details

APN / Parcel Number

Primary APN	`08-3579`
Alternative APNs	`GREE M:08 B:3579` `358/019`

Interior

Bedrooms	5 Beds
Full Baths	4.5 Baths
Half Baths	1 Half Bath
Total Rooms	13 Rooms
Stories	2 Stories
Building Area	3,444 sqft Living Area
Basement Area	1,248 sqft
Unfinished Basement	1,248 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1969
Effective Year Built	Effective 1979
Architectural Style	Colonial
Exterior Material	Wood Siding
Construction Type	Frame
Roof Type	Gable
Roof Material	Asphalt
Lot Area	45,738 sqft (1.05 acres)
Garage Type	Attached
Parking Spaces	1 Parking Space
Pool Type	In-Ground Pool

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Hot Water
Heating Fuel	Gas

Location & Zoning

Account Number	358/019
Street Address	23 FRONTIER RD
City	COS COB
State	CT
Zip	06807-1208
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Block	3579
Jurisdiction	GREENWICH CT
Township / Civil Division	GREENWICH
Census Block Group	1
Census Block	1005
Census Tract	10202

Owner

Source: Greenwich Town records · APN 08-3579

Assessment roll updated June 25, 2026 · Last verified July 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on File
Mailing Address	23 FRONTIER RD, COS COB, CT 06807-1208
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Sep 30, 2021 · Amount on Record
Deed Sale	Sep 30, 2021 · Amount on Record
Prior Sale	Jun 20, 2003 · Amount on Record
Deed Document Number	202111305
Deed Book / Page	7983 / 340
Record Updated	Sep 20, 2026

September 2021: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	GREENWICH CT
Recording Date	Sep 30, 2021
Property Address	23 FRONTIER RD, COS COB, CT 06807-1208
Document Number	7983-340
Book / Page	7983 / 340
Instrument Date	Sep 30, 2021
Instrument	11305
Transaction Type	Transfer
Record Updated	Oct 14, 2021

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
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	23 FRONTIER RD, COS COB, CT 06807-1208

Mortgage

Document Number	11306
Date	Sep 30, 2021
Instrument	11306

Lender

Name	US BANK NA
Type	Bank

Agreement

Type	Stand-Alone First Mortgage
Amount	Amount Recorded

Tax Assessment & Valuation

Source: Greenwich Town records · Assessment roll updated June 25, 2026 · Last verified July 2026

Property Jurisdictions

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

Tax Bill & Assessment History

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

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$11,721.00	$973,490 (-) Land $528,220 Building $445,270	$681,443 Land $369,754 Building $311,689
2024	$11,721.00 (+5.71%)
2023	$11,088.00 (+0.97%)	$973,490 (-) Land $528,220 Building $445,270
2022	$10,981.00	$973,490 Land $528,220 Building $445,270

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, County delivery 09001C, updated November 28, 2025 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X
Special Flood Hazard Area	No
Flood Hazard	Minimal
500-Year Floodplain	No

Wildfire

Wildfire Risk	Low above 6% of the US · above 11% of Connecticut
Wildfire Likelihood	Less than 1 in 10,000 per year
Exposure	Direct burnable vegetation at the parcel

Values are read at the parcel center point; lenders make the official flood determination.