Condominium at 3 Seal Harbor Road # 342, Winthrop MA 02152, Winthrop
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$639,000

3 Seal Harbor Road # 342, Winthrop MA 02152
Winthrop, MA 02152
Listed by Nancy Ciampa McLaughlin
Bedrooms
2
Bathrooms
2
Living area
1,302 sqft
Year built
1987

About this home

Seal Harbor in Winthrop offers an elevated coastal living experience that is unparalleled. Timeless detail inside & out of this building is complemented by white-glove concierge service. Unit 342 is a luxury residence with ocean & pool views from every window. It is conveniently located a few steps from the new elevators & welcomes you into an open floor plan with striking natural sunlight; hardwood floors & a modern kitchen with island dining. Unit offers 2 spacious bedrooms with marble en-suite baths & walk-in closets. A private oversized balcony is the crown jewel with magnificent views. Conveniences include garage parking, extra storage ideal for seasonal items, in-unit laundry & central A/C. Residents enjoy premium amenities such as game room, club room with full kitchen, hobby room & multiple meeting rooms. Building also showcases a fitness center, sauna, hot tub, indoor pool & roof deck with Boston skyline & ocean views. Seal Harbor is a hidden gem on the Boston City line.

Highlights

Waterfront

Property details

MLS #
73506354
Property type
Condominium
Subdivision
N/A
Status
Active
Days on market
168
On market date
April 23, 2026
Stories
1
Total bathrooms
2
Garage spaces
1
Parking spaces
2
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 (e.g. NC Dept. of Public Instruction, SC Report Card).

Elementary
William P. Gorman/Fort Banks Elementary
0.7 mi away · Grades -1-2
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
481
Student:teacher ratio
12.7:1
District
Winthrop
Middle
Winthrop Middle School
0.84 mi away · Grades 6-8
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
423
Student:teacher ratio
11.1:1
District
Winthrop
High
Winthrop High School
0.85 mi away · Grades 9-12
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
564
Student:teacher ratio
13.4:1
District
Winthrop

Walkability

Blended score for Winthrop'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).

69
Walkable
out of 100
EPA National Walkability Index
13.0 / 20 -- Above average walkable
Google Places amenity density
75 / 100
Restaurants & cafes14
Grocery stores1
Parks14
Schools6
Transit stops20
Pharmacies0

Market position

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

On the market 168 days -- 89 more days than Winthrop's current average of 79 days.
For reference, the median list price across 229 active listings in Winthrop right now is $499,900.

Mortgage calculator

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Est. monthly payment
$3,998/mo
$127,800 down
$511,200 loan
Principal & interest$3,316
Property tax (est.)$533
Home insurance (est.)$150

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Data source: Listing information provided by MLS Property Information Network via Trestle/CoreLogic. Last updated September 2, 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.