For sale

$695,000

99 Sumner St #101, Boston, MA 02128

1beds

821sqft

$5,486/mo

Get pre-qualified

Condominium

Built in 2020

-- sqft lot

$674,900 Zestimate^®

$847/sqft

$977/mo HOA

What's special

Open concept living spacePrivate outdoor spaceVersatile denFloor to ceiling windowsCorner residenceNatural light

A rare opportunity to own one of the few one bedroom residences at The Mark with both a private outdoor space and a versatile den. Thoughtfully designed to maximize both function and style, this corner residence offers the flexibility today's buyers are searching for. Whether you envision a home office, guest room, nursery, fitness space, or creative studio, the den adapts to your lifestyle delivering the benefits of a larger home while maintaining the value of a one bedroom. Floor to ceiling windows fill the open concept living space with natural light and frame sweeping views of Boston Harbor and the skyline. Built in 2021, The Mark is East Boston's premier full service waterfront residence, offering concierge, fitness center, golf simulator, co working and conference spaces, pet spa, resident lounges, and a harbor front terrace with fire pits and grills. Just moments from Maverick Station, the water shuttle, Seaport, and Downtown Boston.

31 days

264

11

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 1
Bathrooms: 1
Full bathrooms: 1

Primary bedroom

Level: First

Bathroom 1

Level: First

Kitchen

Level: First

Living room

Level: First

Heating

Forced Air

Cooling

Central Air

Appliances

Included: Range, Dishwasher, Microwave, Refrigerator, Washer, Dryer

Features

Den
Has basement: No
Has fireplace: No

Interior area

Total structure area: 821
Total interior livable area: 821 sqft
Finished area above ground: 821

Property

Parking

Total spaces: 1
Parking features: Rented
Uncovered spaces: 1

Features

Entry location: Unit Placement(Ground)
Patio & porch: Patio
Exterior features: Patio
On waterfront: Yes
Waterfront features: Waterfront

Details

Parcel number: W:01 P:05403 S:002,5200268
Zoning: CD

Construction

Type & style

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

Condition

Year built: 2020

Utilities & green energy

Sewer: Public Sewer
Water: Public

Community & HOA

Community

Features: Public Transportation, Park, Walk/Jog Trails, Bike Path, Highway Access, Marina, T-Station

HOA

Amenities included: Elevator(s), Recreation Facilities, Fitness Center, Clubroom
Services included: Water, Sewer, Insurance, Security, Maintenance Structure, Maintenance Grounds, Snow Removal, Trash
HOA fee: $977 monthly

Location

Region: Boston

Financial & listing details

Price per square foot: $847/sqft
Tax assessed value: $696,600
Annual tax amount: $8,067
Date on market: 7/13/2026

Estimated market value

$674,900

$641,000 - $709,000

$3,082/mo

Price history

Date	Event	Price
7/13/2026	Listed for sale	$695,000-0.4%$847/sqft
Source: MLS PIN #73548575 Report a problem
5/9/2026	Listing removed	$698,000$850/sqft
Source: MLS PIN #73446050 Report a problem
4/13/2026	Price change	$698,000-4.4%$850/sqft
Source: MLS PIN #73446050 Report a problem
2/12/2026	Price change	$730,000-0.7%$889/sqft
Source: MLS PIN #73446050 Report a problem
2/4/2026	Price change	$735,000-0.5%$895/sqft
Source: MLS PIN #73446050 Report a problem
11/20/2025	Price change	$739,000-1.5%$900/sqft
Source: MLS PIN #73446050 Report a problem
10/21/2025	Listed for sale	$750,000+4.9%$914/sqft
Source: MLS PIN #73446050 Report a problem
8/27/2021	Sold	$714,900$871/sqft
Source: MLS PIN #72890554 Report a problem