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$6,985,000

Active

451 Mansfield Avenue

Darien, Connecticut, 06820 · Fairfield County

7

Beds

11

Baths

9,058

Sq Ft

1999

Built

MLS # 24213571

Price / Sq Ft

$771

Property Type

Single Family For Sale

Lot Size

2.7

Class

Property

About This Property

Set back from the road on 2.7 beautifully landscaped acres, 451 Mansfield Avenue offers the privacy, grandeur, and distinctive character of a true country estate. A sweeping circular drive introduces a grand residence distinguished by its striking stone facade and timeless architectural detailing, a substantial two-story guest house, and a magnificent outdoor setting centered around a 24' x 48' infinity-edge pool. Extensive custom stonework, elegant terraces, and lush grounds enhance the property's distinctive estate-like character. Extensively renovated in 2026, the residence features all- new mechanical systems, new windows, and thoughtfully redesigned interiors. Blending timeless architectural elegance with sophisticated contemporary luxury, the home offers approximately 9,000 square feet of finished living space, including a light-filled 1,600-square-foot walk-out lower level. Inside, a graceful, curved staircase rises from the herringbone-floored foyer, introducing beautifully proportioned rooms, distinctive millwork, and refined architectural detailing. Formal living and dining rooms, each with a custom marble fireplace, provide gracious entertaining spaces, while a richly paneled library with coffered ceiling and fireplace offers a distinguished private study.

Property Details

451 Mansfield Avenue, Darien Connecticut 06820 — Single Family For Sale listed at $6,985,000.

At a Glance

7

Bedrooms

11

Bathrooms

9,058

Sq Ft

2.7

Lot Size

--

Garage

1999

Year Built

The Details

Property TypeSingle Family For Sale
NeighborhoodFairfield
Address451 Mansfield Avenue
MLS Number24213571
Year Built1999
Square Footage9,058
Lot Size2.7
Bedrooms7
Bathrooms11
Water SourcePublic Water Connected

Property Details

Other Details

Appliances IncludedGas Range,Wall Oven,Microwave,Range Hood,Subzero,Dishwasher,Washer,Electric Dryer,Wine Chiller
In Law AccessDetached,Separate Entry
In Law ApartmentPossible
Lockbox LocationFront Door
Parcel Number1975979
ZoningR2

Financial

Assessed Value3043810
Mil Rate Total15.48
Property Tax47118
Tax YearJuly 2025-June 2026

Property Features

Attic DescriptionWalk-up
Attic YN1
Basement DescriptionFull,Heated,Sump Pump,Storage,Garage Access,Cooled,Partially Finished
Cooling SystemCentral Air
Exterior SidingStone,Wood
Fireplaces Total6
Foundation TypeConcrete
Fuel Tank LocationIn Ground
Garage ParkingAttached Garage
Garages Number4
Heat Fuel TypePropane
Heat TypeHot Air
Hot Water DescriptionPropane,Domestic
Interior FeaturesSauna
Laundry Room InfoUpper Level
Pool DescriptionGunite,Heated,Pool House,Infinity Edge,Salt Water,In Ground Pool
Roof InformationSlate
Swimming Pool YN1

All Photos (40)

MARKET CONTEXTDarien →
Town Median+299% vs list
$1,750,000
Darien, CT
Mill Rate
14.36
Fairfield County
NYC Commute
50 min
Metro-North express
Schools
A+
2 graded
LOADING COMP CLOUD…

This listing is +299% vs the Darien median. Verify against same-school-district comps before competing offers.

Contact Naima Mazouzi

Fill out the form below and we will respond promptly.

Affordability Calculator

$6,985,000

Down Payment$1,397,000
Loan Amount$5,588,000
Principal & Interest$35,320/mo
Property Tax$6,985/mo
Insurance$100/mo
Est. Monthly$42,405/mo

Listing Agent

N

Naima Mazouzi

Eagle Eye Realty PLLC

Quick Facts

StatusActive
TypeSingle Family For Sale
ClassProperty
MLS #24213571
Last Updated2026-10-13