For sale

$1,490,000

99 Sumner St #321, Boston, MA 02128

2beds

1,195sqft

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Condominium

Built in 2021

-- sqft lot

$1,421,800 Zestimate^®

$1,247/sqft

$1,567/mo HOA

What's special

Sleek contemporary designOversized windows

Residence 321 at The Mark, offers sophisticated waterfront living with panoramic harbor and skyline views. This spacious 2 bedroom + den home features oversized windows, a private balcony with stunning sunset views, sleek contemporary design complemented by custom motorized window treatments throughout. The open-concept layout is ideal for modern living and entertaining. Rarely available, the residence also includes TWO garage parking spaces and TWO private storage units. Residents enjoy luxury amenities including 24/7 concierge, fitness center with flex studio, harbor view terrace with grills and fire pits, resident lounge, golf simulator, conference room, and pet spa. Located in East Boston’s vibrant waterfront neighborhood, The Mark is just a 2-minute walk to Maverick Station on the MBTA Blue Line, steps from water taxis and the MBTA Ferry, and minutes from Logan Airport. Enjoy a waterfront lifestyle with refined living, exceptional convenience, and picture-perfect views.

33 days

174

7

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Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 2
Bathrooms: 2
Full bathrooms: 2

Primary bathroom

Features: Yes

Heating

Central, Forced Air, Individual, Unit Control

Cooling

Central Air, Individual, Unit Control

Appliances

Included: Range, Dishwasher, Disposal, Microwave, Refrigerator, Freezer, Washer, Dryer
Laundry: In Unit

Features

Flooring: Wood, Tile
Has basement: No
Has fireplace: No

Interior area

Total structure area: 1,195
Total interior livable area: 1,195 sqft
Finished area above ground: 1,195

Property

Parking

Total spaces: 2
Parking features: Attached, Under, Garage Door Opener
Attached garage spaces: 2

Features

Exterior features: Balcony, City View(s)
Has view: Yes
View description: City, Water, Harbor
Has water view: Yes
Water view: Harbor,Water
Waterfront features: Waterfront, Harbor, Ocean, 1 to 2 Mile To Beach, Beach Ownership(Public)

Details

Parcel number: 1328111
Zoning: CD

Construction

Type & style

Home type: Condo
Property subtype: Condominium
Attached to another structure: Yes

Condition

Year built: 2021

Utilities & green energy

Sewer: Public Sewer
Water: Public

Community & HOA

Community

Features: Public Transportation, Shopping, Pool, Tennis Court(s)
Security: Intercom, Concierge

HOA

Amenities included: Hot Water, Elevator(s), Putting Green, Recreation Facilities, Fitness Center, Clubroom, Storage, Clubhouse
Services included: Water, Sewer, Insurance, Security, Maintenance Structure, Maintenance Grounds, Snow Removal, Trash, Reserve Funds
HOA fee: $1,567 monthly

Location

Region: Boston

Financial & listing details

Price per square foot: $1,247/sqft
Tax assessed value: $1,157,400
Annual tax amount: $6,419
Date on market: 5/27/2026

Estimated market value

$1,421,800

$1.35M - $1.49M

$4,090/mo

Price history

Date	Event	Price
5/27/2026	Listed for sale	$1,490,000-5.4%$1,247/sqft
Source: MLS PIN #73524677 Report a problem
10/16/2025	Listing removed	$6,000$5/sqft
Source: MLS PIN #73430673 Report a problem
9/15/2025	Listed for rent	$6,000-7.7%$5/sqft
Source: MLS PIN #73430673 Report a problem
9/2/2025	Listing removed	$6,500$5/sqft
Source: Zillow Rentals Report a problem
9/1/2025	Listing removed	$1,575,000$1,318/sqft
Source: MLS PIN #73365390 Report a problem
7/23/2025	Listed for rent	$6,500$5/sqft
Source: Zillow Rentals Report a problem
4/28/2025	Listed for sale	$1,575,000$1,318/sqft
Source: MLS PIN #73365390 Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$13,270 +14.9%	$1,145,900 +8.1%
2024	$11,552 +3.6%	$1,059,800 +2.1%
2023	$11,153	$1,038,500

Find assessor info on the county website

Monthly payment

Est. payment

Payment breakdown

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All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.

HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.

Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.

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