For sale

$1,199,000

99 Sumner St #421, Boston, MA 02128

2beds

1,195sqft

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Condominium

Built in 2021

-- sqft lot

$1,158,600 Zestimate^®

$1,003/sqft

$1,428/mo HOA

What's special

Fireplace loungeIn-unit laundryWarm hardwood floorsPrivate balconyTwo garage parking spacesQuartz countertopsTwo bedrooms

Experience exceptional waterfront living at The Mark. This residence features two bedrooms, a bonus room/versatile den, two full baths, and a private balcony overlooking the Harbor. The open-concept interior is anchored by a chef’s kitchen boasting Bosch appliances and quartz countertops, all flowing seamlessly across warm hardwood floors. Generous bedrooms and closet space, while the primary bedroom features an ensuite bathroom. This home comes complete with in-unit laundry, two garage parking spaces and a private storage unit. Life at The Mark offers unparalleled full-service luxury. Residents enjoy a 24-hour concierge, fitness center, fireplace lounge, billiards room, library, & a pet spa. Step outside to the private balcony or explore the vibrant local scene. With the ferry, Blue Line, and Logan Airport just moments away, downtown Boston & beyond are within easy reach. This is a rare opportunity to enjoy a dynamic city lifestyle in a in a premier waterfront setting.

8 days

240

14

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Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 2
Bathrooms: 2
Full bathrooms: 2

Primary bathroom

Features: Yes

Heating

Forced Air

Cooling

Central Air

Appliances

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

Features

Flooring: Wood
Windows: Insulated Windows
Has basement: No
Has fireplace: No
Common walls with other units/homes: 2+ Common Walls

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: Under, Garage Door Opener
Attached garage spaces: 2

Features

Entry location: Unit Placement(Upper)
Patio & porch: Deck
Exterior features: Deck
Has view: Yes
View description: Water, Harbor
Has water view: Yes
Water view: Harbor,Water
Waterfront features: Waterfront, Harbor

Details

Parcel number: 0105403128,5200268
Zoning: 102 Res

Construction

Type & style

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

Materials

Brick

Condition

Year built: 2021

Utilities & green energy

Sewer: Public Sewer
Water: Public
Utilities for property: for Gas Range

Community & HOA

Community

Features: Public Transportation, Shopping, Park, Walk/Jog Trails, Bike Path, Highway Access, House of Worship, Private School, Public School, T-Station, University
Security: Intercom, TV Monitor, Concierge

HOA

Amenities included: Hot Water, Recreation Facilities, Fitness Center, Storage, Garden Area
Services included: Heat, Water, Sewer, Insurance, Security, Maintenance Structure, Maintenance Grounds, Snow Removal, Trash, Reserve Funds
HOA fee: $1,428 monthly

Location

Region: Boston

Financial & listing details

Price per square foot: $1,003/sqft
Tax assessed value: $999,999,999
Annual tax amount: $14,608
Date on market: 6/18/2026
Listing terms: Contract

Estimated market value

$1,158,600

$1.10M - $1.22M

$4,158/mo

Price history

Date	Event	Price
6/18/2026	Listed for sale	$1,199,000-15.1%$1,003/sqft
Source: MLS PIN #73538123 Report a problem
4/4/2022	Sold	$1,411,900$1,182/sqft
Source: MLS PIN #72930549 Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$13,384 +15.9%	$1,155,800 +9.1%
2024	$11,550 +3.6%	$1,059,600 +2.1%
2023	$11,151	$1,038,300

Find assessor info on the county website

Monthly payment

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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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