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$6,985,000 Just Listed

  • For Sale
  • Active
  • Single Family
  • 7 Beds
  • 9 Full Baths
  • 2 Partial Baths
  • 9,058 Sq. Ft.
  • 4 Car Garage
  • Updated 2 hours ago
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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.

Full Property Details for 451 Mansfield Ave

General

  • Price: $6,985,000
  • Taxes: (July 2025-June 2026)
  • Status: Active
  • Type: Single Family
  • Source: SMARTMLS
  • MLS ID: 24213571
  • Updated: Today (10/13/2026)
  • Added to Site: Today

Interior

  • Number of Rooms: 15
  • Interior Features: Sauna
  • Fireplace: Yes
  • Number of Fireplaces: 6
  • Appliances: Gas Range, Wall Oven, Microwave, Range Hood, Subzero, Dishwasher, Washer, Electric Dryer, Wine Chiller

Rooms

Bathrooms

  • Total Bathrooms: 11
  • Full Bathrooms: 9
  • Half Bathrooms: 2

Bedrooms

  • Total Bedrooms: 7
  • Primary Bedroom: Primary Bedroom, Upper
  • Bedroom 1: Bedroom, Other
  • Bedroom 2: Bedroom, Upper
  • Bedroom 3: Bedroom, Upper
  • Bedroom 4: Bedroom, Upper
  • Bedroom 5: Bedroom, Upper
  • Bedroom 6: Bedroom, Upper

Other Rooms

  • Living Room: Living Room, Main
  • Kitchen: Kitchen, Main
  • Dining Room: Dining Room, Main
  • Laundry: Upper Level

Additional Information

  • Pool: Yes
  • Pool Description: Gunite, Heated, Pool House, Infinity Edge, Salt Water, In Ground Pool

Parking

  • Garage: Yes
  • Attached garage: Yes
  • Garage Spaces: 4
  • Parking: Attached Garage

Location

  • County: Fairfield
  • Driving Directions: GPS Friendly

School Information

  • Elementary School: Per Board of Ed
  • High School: Per Board of Ed

Heating & Cooling

  • Cooling Type: Central Air
  • Heating Type: Hot Air, Propane
  • Heating Fuel: Propane
  • Water Heater: Propane, Domestic

Utilities

  • Sewer: Public Sewer Connected
  • Water: Public Water Connected

Structural Information

  • Architectural Style: Colonial
  • Construction Status: No/Resale
  • Exterior Const.: Stone, Wood
  • Basement Desc.: Full, Heated, Sump Pump, Storage, Garage Access, Cooled, Partially Finished
  • Roof: Slate
  • Attic: Yes
  • Square Feet: 9,058
  • Above Ground: 7,472 Sq. Ft.
  • Below Ground: 1,586 Sq. Ft.
  • Year Built: 1999

Lot Features

  • Lot Size (Acres): 2.7
  • Zoning: R2
  • Lot Description: Lightly Wooded, Dry, Professionally Landscaped

Financial Considerations

  • Assessment Amount: $3,043,810
  • Tax Year: July 2025-June 2026

Disclosures and Reports

  • Property ID: 1975979

Listed by Eagle Eye Realty PLLC, Naima Mazouzi

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Listing agent

— 451 Mansfield Ave —

  • Naima Mazouzi

    Eagle Eye Realty PLLC

Agent Contact: (860) 754-7651 Office Contact: (860) 263-9102

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Price & Sales History for 451 Mansfield Ave Get Price Alerts and Save Property

Date
Details
Price
Change
Source
10/13/2026
Listed
$6,985,000
106.66%
MLS
4/13/2026
Sold
$3,380,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 451 Mansfield Ave

Year
Property Taxes
Change
Tax Assessment
Change
2025
$47,118
5%
$3,043,810
—
2023
$44,714
1%
$3,043,810
22%
2023
$44,095
2%
$2,503,970
—
2022
$43,143
2%
$2,503,970
—
2021
$42,167
3%
$2,503,970
—
2020
$40,890
-20%
$2,503,970
-20%
2019
$51,283
-18%
$3,113,740
-20%
2018
$62,592
—
$3,892,560
—
2017
$62,904
2%
$3,892,560
—
2016
$61,386
3%
$3,892,560
—
2015
$59,751
2%
$3,892,560
—
2014
$58,427
15%
$3,892,560
1%
2012
$50,897
—
$3,864,630
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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Listed by Eagle Eye Realty PLLC, Naima Mazouzi

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451 Mansfield Avenue, Darien, CT 06820 (MLS# 24213571) is a Single Family property with 7 bedrooms, 9 full bathrooms and 2 partial bathrooms. 451 Mansfield Avenue is currently listed for $6,985,000 and was received on October 13, 2026. Want to learn more about 451 Mansfield Avenue? Do you have questions about finding other Single Family real estate for sale in Darien? You can browse all Darien real estate or contact a Coldwell Banker agent to request more information.

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