10 Serenity Ln, Cos Cob, CT 06807 Property Records

Greenwich Town property record for 10 Serenity Ln, Cos Cob, CT 06807

Property Summary

Property Type	Single Family Home
Details	4 bd · 6.5 ba · 4,985 sqft · built 1966
Lot Size	1 acres (43,560 sqft)
Owner	2 Individual Names on File
Last Sale	$2,410,000 (May 2020)
Tax Bill	$21,081 (2026)
Deeds & Mortgages	May 2020 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`08A-1223S`

Property Details

APN / Parcel Number

Primary APN	`08A-1223S`
Alternative APNs	`GREE M:08A B:1223/S` `399/022`

Interior

Bedrooms	4 Beds
Full Baths	6.5 Baths
Half Baths	1 Half Bath
Total Rooms	12 Rooms
Stories	2 Stories
Building Area	4,985 sqft Living Area
Attic	Attic
Attic Area	522 sqft
Basement Area	1,950 sqft
Unfinished Basement	1,950 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1966
Effective Year Built	Effective 1975
Architectural Style	Colonial
Exterior Material	Wood Siding
Construction Type	Frame
Roof Type	Gable
Roof Material	Asphalt
Lot Area	43,560 sqft (1 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	Forced Air with A/C
Heating Fuel	Gas

Location & Zoning

Account Number	399/022
Street Address	10 SERENITY LN
City	COS COB
State	CT
Zip	06807-1417
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	RA-1
Legal Block	1223/S
Jurisdiction	GREENWICH CT
Township / Civil Division	GREENWICH
Census Block Group	1
Census Block	1009
Census Tract	10202

Owner

10 Serenity Ln is owned and occupied by two individuals who bought it in May 2020.

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

Owner of Record	2 Individual Names on File
Mailing Address	10 SERENITY LN, COS COB, CT 06807-1417
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

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	May 15, 2020 · Amount on File
Deed Sale	May 15, 2020 · Amount on File
Prior Sale	Mar 14, 2006 · Amount on File
Deed Document Number	20203551
Deed Book / Page	7664 / 249
Record Updated	Oct 29, 2026

May 2020: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	GREENWICH CT
Recording Date	May 15, 2020
Property Address	10 SERENITY LN, COS COB, CT 06807-1417
Document Number	7664-249
Book / Page	7664 / 249
Instrument Date	Apr 17, 2020
Instrument	3551
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
Address	10 SERENITY LN, COS COB, CT 06807-1417

Mortgage

Document Number	3552
Date	May 15, 2020
Instrument	3552

Lender

Name	BANK OF AMERICA NA
Type	Bank

Agreement

Type	Stand-Alone First Mortgage
Amount	Amount on Record

Interest

Rate Type	Adjustable Rate
Type Change Date	Jun 1, 2030

Tax Assessment & Valuation

The 2026 property tax bill for 10 Serenity Ln was $21,081, up 7.3% 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	$21,081.00 (+7.33%)	$2,010,820 (+26.52%) Land $785,400 Building $1,225,420	$3,834,714 (+244.69%)
2025	$19,642.00	$1,589,280 Land $654,500 Building $934,780	$1,112,496 Land $458,150 Building $654,346
2024	$19,642.00 (+6.21%)
2023	$18,493.00 (+1.91%)	$1,589,280 (+0.98%) Land $654,500 Building $934,780
2022	$18,146.00	$1,573,810 Land $654,500 Building $919,310

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

Flood

FEMA maps place 10 Serenity Ln 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 10 Serenity Ln 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

5G and 4G LTE (outdoors only)

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