Condominium at 99 Sumner St # 310, Boston MA 02128, Boston
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18 photos

$749,000

99 Sumner St # 310, Boston MA 02128
Boston, MA 02128
Listed by Samantha Berdinka
Bedrooms
1
Bathrooms
1
Living area
740 sqft
Year built
2020

About this home

Recent construction. The Mark is a full service waterfront building in East Boston. Sweeping views to the city skyline over Boston Harbor. Just a two minute walk to Maverick Square MBTA, and water shuttles. Concierge, fitness center, golf simulator, club room, library, fire pits and grills. Resort style living on the water. Condo fee includes parking monthly maintenance fee. Elegantly finished unit with ample closet space, Bosch appliances Silestone quartz counter tops. Oversized windows and a peekaboo view of the water from the living room.

Highlights

Waterfront

Property details

MLS
MLS Property Information Network
MLS #
73503476
Property type
Condominium
Subdivision
N/A
Status
Active
Days on market
180
On market date
April 17, 2026
Stories
1
Total bathrooms
1
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 180 days -- 60 more days than Boston's current average of 120 days.
For reference, the median list price across 8,758 active listings in Boston right now is $60,000.

Mortgage calculator

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

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Adjust tax / insurance estimates
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Est. monthly payment
$4,661/mo
$149,800 down
$599,200 loan
Principal & interest$3,886
Property tax (est.)$624
Home insurance (est.)$150

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Data source: Listing information provided by MLS Property Information Network via Trestle/CoreLogic. Last updated April 21, 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.