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275 Mason Street 4AGreenwich, CT 06830

For Sale

$8,450,000

Smart Buyer Rebate $84,500

Chilston Court, offering two-bedroom homes to penthouses. Designed by Robert A.M. Stern Architects with interiors by Bryan O'Sullivan Studio. Amenities include 24/7 Concierge, landscaped courtyard, indoor parking, full wellness area, and multiple resident lounges. Occupancy anticipated November 2028. Taxes estimated and projected for the first year of operation. Floor plans and renderings are artists' conceptions and are not intended to be an actual depiction of the home. All photos shown are renderings and not actual photography. Dimensions and plans are approximate and are subject to variation. This is not an offer. The offering terms are in the Purchase Agreement, Public Offering Statement and Community Documents that will be available from the Declarant, Mason Street Partners LLC.

Listed by Angela Ferrara

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License #REB.0757201

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203-561-7328

Last updated August 31, 2026

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Source: FlexMLS #125720

Listing Facts

  • TypeCondo
  • NeighborhoodDowntown Greenwich
  • Bedrooms3
  • Bathrooms3.5
  • Days on Prevu22
  • Taxes$61,989/year
  • Size2,670 sqft
  • Price per sqft$3,165

Amenities

  • Air Conditioning
  • Parking
  • Swimming Pool

Location

Mortgage Calculator

Listing History

08/24/2026
Listed by
$8,450,000
  1. 08/24/2026$8,450,000
    Listed by

Property Details for 275 Mason Street 4A

Association

Amenities

  • Association Amenities: Spa/Hot Tub, Sauna, Clubhouse, Exercise Room, Pool, Hot Water

Fees

  • Association Fee Includes: Trash, Snow Removal, Grounds Care

Exterior

Construction

  • Property Condition: Under Construction
  • Roof: Asphalt
  • Year Built: 2028
  • Architectural Style: Other
  • Construction Materials: Brick, Masonry, Stone
  • Exterior Features: Balcony

Features

  • Pool Private: Yes

Measurements

  • Building Area Total: 2,670
  • Lot Features: Corner Lot, Courtyard
  • Lot Size Acres: 1.78
  • Lot Size Area: 1
  • Lot Size Square Feet: 77,536
  • Lot Size Units: Acres

Financial

Taxes

  • Parcel Number: 01-1602/S
  • Tax Annual Amount: $61,989.00

Interior

Features

  • Fireplace: Yes
  • Fireplaces Total: 1
  • Interior Features: Entrance Foyer

Rooms

  • Bathrooms Full: 3
  • Bathrooms Half: 1
  • Bathrooms Total Integer: 4
  • Bedrooms Total: 3

Other

General

  • Exclusions: See Remarks

Location

  • City Region: South Of Post Road

Parking

Parking

  • Parking Features: Garage Under Building, Attached Garage, Assigned

Schools

Elementary School

  • Elementary School: Julian Curtiss

Middle or Junior School

  • Middle Or Junior School: Central

Utilities

Equipment

  • Cooling: Central Air
  • Has Cooling: Yes
  • Heating: Hot Water
  • Has Heating: Yes
  • Laundry Features: Laundry Room
  • Sewer: Town Sewer
  • Water Source: Public

Frequently Asked Questions

How many bedrooms and bathrooms does this condo have?

There are 3 bedrooms and 3.5 bathrooms in this condo at 275 Mason Street 4A.

What schools are nearby to 275 Mason Street 4A?

Nearby schools include the Julian Curtiss Elementary School and Central Middle School.

What are the annual taxes for 275 Mason Street 4A?

Annual taxes for this condo are estimated at $61,989.

How does 275 Mason Street 4A compare to other condos in Downtown Greenwich?

This condo is listed 174% above the average price for condos in Downtown Greenwich and has been on the market for 20 less days than the typical home in this area.

What is the square footage on this condo?

According to the MLS, this listing is 2,670 sqft.

275 Mason Street 4A is a 3-bedroom, 3.5-bath condo for sale in Greenwich CT 06830. Available on Prevu for 22 days at $8,450,000. This residence features 2,670 square feet of living space, located in Downtown Greenwich. The median listing price for condos in this area is $2,900,000. Nearby schools include Julian Curtiss Elementary School and Central Middle School. Property amenities include air conditioning, parking, and swimming pool. Browse more condo listings in Fairfield County.

Based on information from Greenwich Multiple Listing Service, Inc. and/or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by Prevu or the MLS. Information is provided exclusively for consumer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumer may be interested in purchasing.

Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.