OFF MARKET

Off market feb 2025 for $675K

$648,956

Est. refi paymentEst. refi $2,161/mo

•

1,286

sq ft

3 Seal Hbr #733, Winthrop, MA 02152

About this home

Welcome to Seal Harbor 3. Coastal living at its finest where the serene sounds of waves crashing against the shore meet the vibrant energy of city life just 6 miles away. This beautifully maintained 2 bedroom, 2 bath waterfront condo perched majestically on the water's edge is move-in ready and offers the perfect combination of luxury and convenience. Enjoy stunning views from your private oasis. Seal Harbor is a lifestyle which offers 24/7 concierge, outdoor heated pool, indoor rooftop lap pool, sundeck with Boston skyline views, fitness facility, sauna, tennis courts, billiard room, function rooms, additional storage and so much more. Winthrop By the Sea offers a wonderful sense of community, boating, swimming, fishing, nice local restaurants, golf course, seasonal ferry... Come SEA for yourself, you will not be disappointed. Seller welcomes offers with requests for buyer concessions.

CondoProperty Type

1987Year Built

$505Est. Price/Sq.Ft.

1 car garageParking

Listed by Cathie Curran • Charlesgate Realty Group, llc

Bought with Helen Sullivan • Chinatti Realty Group, Inc.

Redfin checked: 2 minutes ago

•Source:MLS PIN #73318882

Redfin Estimate

$648,956

$26K since sold in February 2025$11K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 0% lower than the average sale price ($649K) of 6 comparable homes.

SOLD BY REDFIN OCT 23, 2026
$623,000
A
2 beds2 baths1,302 sq ft
3 Seal Harbor Rd #342, Winthrop, MA 02152
SOLD AUG 26, 2026
$589,000
B
2 beds2 baths1,241 sq ft
1 Seal Harbor Rd #116, Winthrop, MA 02152
SOLD SEP 15, 2026
$715,500
C
2 beds2 baths1,414 sq ft
1 Seal Hbr #700, Winthrop, MA 02152
SOLD MAY 7, 2026
$632,000
D
2 beds2 baths1,302 sq ft
3 Seal Hbr #344, Winthrop, MA 02152
SOLD MAR 2, 2026
$670,000
E
2 beds2 baths1,327 sq ft
3 Seal Harbor Rd #137, Winthrop, MA 02152
SOLD OCT 15, 2026
$665,000
F
2 beds2 baths1,471 sq ft
550 Pleasant St #510, Winthrop, MA 02152

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$92,794

Est. take-home

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Market trends in 02152, MA

Last updated October 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

99.0%

0.9% MoM

Median sale price

$715K

$86K MoM

Avg. days on market

27d

4 days MoM

Recently sold homes

3 MoM

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Provided by Redfin

Sale history for 3 Seal Hbr #733

Date

Event

Price

TURBOTENANT #1

May 15, 2026

Rental Removed

$1,862

$1/sq ft

May 14, 2026

Listed for Rent

$1,862

$1/sq ft

MLS PIN #73318882

Feb 4, 2025

Sold

$675,000

$525/sq ft

Dec 27, 2024

Contingent

—

Dec 10, 2024

Listed

$675,000

$525/sq ft

MLS PIN #71126730

May 31, 2011

Sold

$325,900

$253/sq ft

Apr 13, 2011

Contingent

—

Jan 20, 2011

Price Changed

$339,000

$264/sq ft

Nov 23, 2010

Relisted

—

Nov 23, 2010

Listing Removed

—

Sep 28, 2010

Price Changed

$349,000

$271/sq ft

Aug 22, 2010

Listed

$359,000

$279/sq ft

Beautiful,Sunny two bedroom,two full baths in Luxurious Seal Harbor Three.Incredible waterfront unit many amenities.Indoor and outdoor Pool and jacuzzi's.Top floor exercise room and sauna,overlooking ocean.Function rooms,Walking paths,Gazebo.One underground deeded parking spot,plenty of guest parking.24 hour concierge,Rooftop sun deck,tennis courts.To Good to miss,come see this great unit overlooking ocean ,gazebo and boats sailing.

Public Records

Jun 13, 1988

Sold

$212,000

$165/sq ft

Year

Property tax

Land + Additions

Assessment*

2023

$5,677 (+0.9%)

$530,600

2022

$5,624 (−2.1%)

$478,200

2021

$5,745 (+3.6%)

$453,100

2020

$5,546 (−1.2%)

$439,500

2019

$5,611 (−3.0%)

$425,700

2018

$5,783 (+2.9%)

$408,400

2017

$5,618 (+0.4%)

$389,900

2016

$5,596 (+16.7%)

$364,100

2014

$4,794 (−1.6%)

$307,700

2013

$4,870 (+2.9%)

$326,600

2012

$4,732 (+7.2%)

$326,600

2011

$4,413 (−7.3%)

$319,800

2010

$4,763 (+21.0%)

$375,000

2009

$3,937

$394,900

Tax history for 3 Seal Hbr #733

Year

Property tax

Land + Additions

Assessment*

2023

$5,677 (+0.9%)

$530,600

2022

$5,624 (−2.1%)

$478,200

2021

$5,745 (+3.6%)

$453,100

2020

$5,546 (−1.2%)

$439,500

2019

$5,611 (−3.0%)

$425,700

2018

$5,783 (+2.9%)

$408,400

2017

$5,618 (+0.4%)

$389,900

2016

$5,596 (+16.7%)

$364,100

2014

$4,794 (−1.6%)

$307,700

2013

$4,870 (+2.9%)

$326,600

2012

$4,732 (+7.2%)

$326,600

2011

$4,413 (−7.3%)

$319,800

2010

$4,763 (+21.0%)

$375,000

2009

$3,937

$394,900

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Public record

Beds

Baths

Stories

Lot width

—

Lot depth

—

Lot size

—

Year renovated

1989

Sq. Ft.

1,286

Year built

1987

Style

Condo/Co-op

County

APN

1425393

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Jul 21, 2023.

Property details

Parking

Parking Information
Has Garage
Has Open Parking
# of Garage Spaces: 1
# of Covered Spaces: 1
AttachedGarageYN: Yes
Parking Features: Under, Deeded, Off Street, On Street, Common, Guest, Paved, Exclusive Parking

Interior

Master Bedroom Information
Features: Flooring - Wood

Bedroom #2 Information
Features: Flooring - Wood

Bathroom Information
# of Bathrooms (Full): 2
Master Bathroom Features: Yes

Bathroom #1 Information
Features: Bathroom - 3/4,Bathroom - Tiled With Shower Stall,Walk-In Closet(s),Flooring - Stone/Ceramic Tile,Countertops - Stone/Granite/Solid,Double Vanity,Remodeled

Bathroom #2 Information
Features: Bathroom - Full,Bathroom - Tiled With Tub & Shower,Walk-In Closet(s),Flooring - Stone/Ceramic Tile,Countertops - Stone/Granite/Solid

Living Room Information
Features: Flooring - Stone/Ceramic Tile,Balcony / Deck,Open Floorplan

Dining Room Information
Features: Flooring - Stone/Ceramic Tile,Lighting - Overhead

Kitchen Information
Features: Flooring - Stone/Ceramic Tile,Countertops - Stone/Granite/Solid,Kitchen Island,Cabinets - Upgraded,Open Floorplan,Remodeled,Stainless Steel Appliances

Basement Information
Basement: Y

Laundry Information
Laundry Features: Common Area, In Building, In Unit, Electric Dryer Hookup, Washer Hookup

Interior Features
# of Rooms (Total): 5
Flooring: Wood, Tile
Interior Features: Elevator

Exterior

Building Information
Building Name: Seal Harbor
Building Area (Total): 1,286
Construction Materials: Brick
StructureType: High-Rise
Stories (Total): 1
Year Built Source: Public Records
Year Built Details: Actual
Lead Paint: None

Exterior Features
Roof: Rubber
Exterior Features: Balcony, Hot Tub/Spa, Gazebo, Outdoor Shower, Professional Landscaping, Tennis Court(s)

Pool Information
Has Spa
Pool Features: Association, In Ground, Indoor, Heated
Spa Features: Hot Tub/Spa

Property Information
PropertySubType: Condominium
Property AttachedYN: Yes
Entry Level: 7
Entry Location: Unit Placement(Upper,Front)
Security Features: Concierge
Other Structures: Gazebo
Has Waterview
Ocean, Public, Sound, Walk to

Lot Information
WaterfrontYN: Yes

Financial

Tax Information
Tax Annual Amount: $5,675
Tax Year: 2024

Utilities

Utility Information
Utilities: for Electric Range, for Electric Oven, for Electric Dryer, Washer Hookup
Sewer: Public Sewer
Water Source: Public
Electric: Circuit Breakers

Heating & Cooling
Has Heating
Has Cooling
Heating: Forced Air, Heat Pump, Individual, Unit Control
Cooling: Central Air, Heat Pump, Individual, Unit Control

Location

HOA Information
Association Fee: $845
Association Fee Frequency: Monthly
Association Fee Includes: Water, Sewer, Insurance, Security, Maintenance Structure, Road Maintenance, Maintenance Grounds, Snow Removal, Trash, Reserve Funds
Association Amenities: Pool, Laundry, Elevator(s), Tennis Court(s), Fitness Center, Sauna/Steam, Clubroom, Trail(s), Storage, Clubhouse

Location Information
Directions: Google Directions.
UnparsedAddress: 3 Seal Harbor # 733, Winthrop MA 02152

Community Information
Senior CommunityYN: No
Community Features: Public Transportation, Shopping, Pool, Tennis Court(s), Park, Walk/Jog Trails, Golf, Medical Facility, Laundromat, Bike Path, Conservation Area, Marina, Public School
Pets Allowed: Yes w/ Restrictions

Public facts

Beds: 2
Baths: 2.0
Sq. Ft.: 1,286
Stories: 1.0
Lot Size: —
Style: Condo/Co-op
Year Built: 1987
Year Renovated: 1989
County: —
APN: 1425393

Home facts updated by county records on Jul 20, 2023

Other

Listing Information
StandardStatus: Closed

Around this home

Schools

K - 12
Preschool & daycare

William P. Gorman/Fort Banks Elementary School

Public PreK-2 • Assigned • 0.7mi

Winthrop Middle School

Public 6-8 • Assigned • 0.8mi

8/10

Winthrop Senior High School

Public 9-12 • Assigned • 0.8mi

5/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Historical weather

Winthrop, MA • 02152

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 9.2 hours in June and 4.4 hours in December, placing it below the U.S. average for solar exposure.

9.2 hrs

4.4 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$617,000 – $747,000

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Home values near 3 Seal Hbr #733

Data from public records.

Address	Redfin Estimate
3 Seal Harbor Rd Apt 134, Winthrop, MA 1 Beds \| 1 Baths \| 897 Sq. Ft.	$456,973
3 Seal Harbor Rd Apt 235, Winthrop, MA 2 Beds \| 2 Baths \| 1306 Sq. Ft.	$624,714
3 Seal Harbor Rd Apt 248, Winthrop, MA 2 Beds \| 2 Baths \| 1320 Sq. Ft.	$660,607
3 Seal Harbor Rd Apt 341, Winthrop, MA 1 Beds \| 1 Baths \| 871 Sq. Ft.	$455,695
3 Seal Harbor Rd Apt 432, Winthrop, MA 1 Beds \| 2 Baths \| 1263 Sq. Ft.	$551,103
3 Seal Harbor Rd Apt 444, Winthrop, MA 2 Beds \| 2 Baths \| 1422 Sq. Ft.	$638,738
3 Seal Harbor Rd Apt 543, Winthrop, MA 1 Beds \| 1 Baths \| 838 Sq. Ft.	$488,197

Address	Redfin Estimate
3 Seal Harbor Rd Apt 136, Winthrop, MA 2 Beds \| 2.5 Baths \| 1505 Sq. Ft.	$707,159
3 Seal Harbor Rd Apt 243, Winthrop, MA 1 Beds \| 1 Baths \| 838 Sq. Ft.	$448,793
3 Seal Harbor Rd Apt 331, Winthrop, MA 1 Beds \| 1.5 Baths \| 1033 Sq. Ft.	$468,631
3 Seal Harbor Rd Apt 345, Winthrop, MA 2 Beds \| 2 Baths \| 1310 Sq. Ft.	$608,173
3 Seal Harbor Rd Apt 436, Winthrop, MA 3 Beds \| 2.5 Baths \| 1674 Sq. Ft.	$1,118,670
3 Seal Harbor Rd Apt 533, Winthrop, MA 2 Beds \| 2 Baths \| 1286 Sq. Ft.	$589,416
3 Seal Harbor Rd Apt 631, Winthrop, MA 1 Beds \| 1.5 Baths \| 1033 Sq. Ft.	$530,012

Address	Redfin Estimate
3 Seal Harbor Rd Apt 231, Winthrop, MA 1 Beds \| 1.5 Baths \| 1033 Sq. Ft.	$519,179
3 Seal Harbor Rd Apt 246, Winthrop, MA 2 Beds \| 2 Baths \| 1202 Sq. Ft.	$568,163
3 Seal Harbor Rd Apt 333, Winthrop, MA 2 Beds \| 2 Baths \| 1286 Sq. Ft.	$630,214
3 Seal Harbor Rd Apt 431, Winthrop, MA 1 Beds \| 1.5 Baths \| 1010 Sq. Ft.	$520,105
3 Seal Harbor Rd Apt 441, Winthrop, MA 1 Beds \| 1 Baths \| 871 Sq. Ft.	$471,857
3 Seal Harbor Rd Apt 535, Winthrop, MA 2 Beds \| 2 Baths \| 1306 Sq. Ft.	$581,663
3 Seal Harbor Rd Apt 633, Winthrop, MA 2 Beds \| 2 Baths \| 1286 Sq. Ft.	$591,417

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