Unit 421/99 Sumner Street

Boston MA 02128

1195 sq. ft.

Condo

Last sold for $1,160,000

Caroline Morson, last sold this property on 10 August 2026 after 53 days on market.

Overview

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.

Features

2 bedrooms

2 bathrooms

2 carspaces

2 garage spaces

1195 sq. ft. floor area

Condo

Estimated Value

Based on this property and similar 2 bedroom condos sold in Boston over the last 12 months, the estimated median property value of Unit 421/99 Sumner Street is $657.75k.

Median value

$657.75k

Estimated value range

$310k - $1.82m

Median days on market

Estimated value trend

increase over the last 12 months

Average days on market is based on recent, comparable sales in Boston. It is only an indication of the time a property is actively listed and should not be relied upon as an accurate representation of how soon a property will be sold.

Property history for Unit 421/99 Sumner Street

2026

Sold

$1,160,000

10 Aug 2026 by Caroline Morson

2022

Sold

$1,411,900

04 Apr 2022 by Janice Dumont, of Advisors Living - New Developments

Happy sellers in Boston

We have insufficient information to provide an overview of customer satisfaction for Boston. Viewing the agent profiles, reviews and sales for Boston can provide insights for this location.