Condominium at 99 Sumner St # 312, Boston MA 02128
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$959,000

99 Sumner St # 312, Boston MA 02128
Boston, MA 02128
Listed by Highland Homes Team
Bedrooms
2
Bathrooms
2
Living area
1,085 sqft
Year built
2021

About this home

Welcome to The Mark at DeNormandie Wharf. Experience this condo that truly offers the feel of a vacation home with the convenience of city living. This southeast-facing unit bathes in abundant natural light throughout the day, offering breathtaking city and water views. This unit showcases full Bosch appliances, a Silestone Quartz waterfall island, upgraded cabinetry, and a private walkout balcony where you can enjoy New Year's Eve fireworks right from your own space. The Mark is a full-service building that offers a variety of amenity services including a 24/7 concierge, harbor-view lounges, fitness center, golf simulator, pet spa, library, and state-of-a-art courtyard with grills and firepit. Being only two minutes away from Maverick station and nearby ferries to Seaport District, you’re perfectly positioned to enjoy all the excitement of the city while retreating to your tranquil waterfront home. Plus, this unit comes with a deeded garage parking space and a dedicated storage unit.

Highlights

Waterfront

Property details

MLS
MLS Property Information Network
MLS #
73577896
Property type
Condominium
Subdivision
N/A
Status
Active
Days on market
38
On market date
September 15, 2026
Stories
1
Total bathrooms
2
Garage spaces
1
Parking spaces
1
Lot size
N/A
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Nearby schools

Within 10 miles. School directory data from the National Center for Education Statistics (NCES), accessed via the Urban Institute Education Data API. Local Score is calculated by INNOVATE Real Estate; where a state rating is shown, it comes from that state's own official school report card.

Elementary
Dante Alighieri Montessori School
0.34 mi away · Grades -1-6
Nearest school -- attendance-zone data not available here
5.0
Local Score (student-teacher ratio only (preliminary -- will incorporate state test-score data once available)) -- not an official state rating
Enrollment
104
Student:teacher ratio
10.4:1
District
Boston
Middle
Joseph A. Browne School
1.77 mi away · Grades 5-8
Nearest school -- attendance-zone data not available here
4.0
Local Score (student-teacher ratio only (preliminary -- will incorporate state test-score data once available)) -- not an official state rating
Enrollment
540
Student:teacher ratio
12.3:1
District
Chelsea
High
East Boston High
0.97 mi away · Grades 7-12
Nearest school -- attendance-zone data not available here
4.0
Local Score (student-teacher ratio only (preliminary -- will incorporate state test-score data once available)) -- not an official state rating
Enrollment
1,111
Student:teacher ratio
12.2:1
District
Boston

Walkability

Blended score for Boston's center, calculated by INNOVATE Real Estate from two sources: the EPA's National Walkability Index (street network, transit, land-use mix) and Google Places amenity data (what's actually reachable on foot from this point). 60% EPA National Walkability Index + 40% nearby-amenity density (Google Places).

79
Walkable
out of 100
EPA National Walkability Index
13.0 / 20 -- Above average walkable
Google Places amenity density
100 / 100
Restaurants & cafes20
Grocery stores20
Parks20
Schools20
Transit stops20
Pharmacies11

Market position

How this listing compares to current activity in Boston, from live MLS data.

On the market 38 days -- 86 fewer days than Boston's current average of 124 days.
For reference, the median list price across 8,974 active listings in Boston right now is $85,000.

Mortgage calculator

Estimate only - actual rate and payment depend on your lender, credit, and loan program.

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Est. monthly payment
$5,925/mo
$191,800 down
$767,200 loan
Principal & interest$4,976
Property tax (est.)$799
Home insurance (est.)$150

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Data source: Listing information provided by MLS Property Information Network via Trestle/CoreLogic. Last updated September 20, 2026.

Information herein deemed reliable but not guaranteed; all measurements, school assignments, HOA fees, taxes, and feature lists are approximate and should be independently verified. Equal Housing Opportunity.