Condominium at 3 Seal Harbor Rd, Winthrop MA 02152, Winthrop
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$1,230,000

3 Seal Harbor Rd, Winthrop MA 02152
Winthrop, MA 02152
Listed by Cathie Curran
Bedrooms
3
Bathrooms
3
Living area
1,913 sqft
Year built
1987

About this home

Experience elevated waterfront living in this stunning 3 bedroom, 3 bath penthouse at the prestigious Seal Harbor III. This exceptional two-level residence features a spacious open-concept floor plan designed to maximize natural light and showcase its spectacular waterfront setting. Entertain effortlessly or simply relax on the massive private deck, offering the perfect space to enjoy ocean breezes and breathtaking views. The kitchen boasts SS appliances, granite counters, Poggenpohl cabinetry and a breakfast bar. Enjoy the beautiful views while cooking. This 2 level unit offers the flexibility of a first floor bedroom and/or office. Nice open staircase. Lovely primary bedroom with en suite. There is a separate jacuzzi room which could become a home office if one chooses to do so. Seal Harbor III offers an unmatched lifestyle with exceptional amenities, including 24/7 concierge, a beautiful fireplaced lobby, an indoor heated pool and hot tub, a recently renovated fitness center, sauna, rooftop deck with panoramic views, outdoor swimming pool, tennis courts and multiple private resident gathering spaces. Additional highlights include a rare heated two-car garage, G9 and G11. Ideally located in the seaside community of Winthrop, you'll enjoy the tranquility of waterfront living while being just minutes from Logan Airport and downtown Boston, providing the perfect balance of coastal charm and city convenience. LUXURY, LOCATION, AND LIFESTYLE come together in this extraordinary waterfront Penthouse.

Highlights

WaterfrontView

Property details

MLS #
73560746
Property type
Condominium
Subdivision
N/A
Status
Active
Days on market
50
On market date
August 6, 2026
Stories
2
Total bathrooms
3
Garage spaces
2
Parking spaces
2
Lot size
N/A
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Nearby schools

Within 10 miles · public school directory data (NCES)

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: EPA's National Walkability Index (street network, transit, land-use mix) combined with nearby-amenity density. 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
Nearby-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 50 days -- 25 fewer days than Winthrop's current average of 75 days.
For reference, the median list price across 215 active listings in Winthrop right now is $499,900.

Mortgage calculator

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

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Est. monthly payment
$7,557/mo
$246,000 down
$984,000 loan
Principal & interest$6,382
Property tax (est.)$1,025
Home insurance (est.)$150

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Data source: Listing information provided by MLS Property Information Network via Trestle/CoreLogic. Last updated August 11, 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.