OFF MARKET

Off market jul 2025 for $929K

$935,780

Est. refi paymentEst. refi $3,485/mo

•

1,777

sq ft

3 Seal Hbr Ph 31, Winthrop, MA 02152

About this home

Beautifully renovated! Discover Seal Harbor. Situated at the ocean's edge in Winthrop, the Seal Harbor condominium community is located just fifteen minutes from Boston's financial district. The buildings are amenity-rich, offering 24/7 concierge, on-site management, secure underground garage parking, a heated outdoor pool with shower, bathrooms, full poolhouse kitchen, an outdoor Jacuzzi, and two gas grills. Residents also enjoy year-round access to an indoor pool on the 9th floor, complete with dramatic views, a full fitness center, as well as an indoor Jacuzzi and sauna with a large deck-perfect for viewing Independence Day fireworks! Seal Harbor Three boasts three separate function rooms where guests are able to enjoy table tennis, billiards and television. And in addition to the mature grounds, owners also have access to tennis courts, private basement storage, bicycle storage, water sports storage and a full recycling facility. This home has two deeded garage parking spots.

CondoProperty Type

1987Year Built

$527Est. Price/Sq.Ft.

2 car garageParking

Listed by Mark Carangelo • Mark Carangelo

Bought with Mark Carangelo • Mark Carangelo

Redfin checked: a minute ago

•Source:MLS PIN #73346942

Redfin Estimate

$935,780

$6,780 since sold in July 2025$17K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 44.2% higher 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 SEP 15, 2026
$715,500
B
2 beds2 baths1,414 sq ft
1 Seal Hbr #700, Winthrop, MA 02152
SOLD AUG 26, 2026
$589,000
C
2 beds2 baths1,241 sq ft
1 Seal Harbor Rd #116, Winthrop, MA 02152
SOLD MAY 7, 2026
$632,000
D
2 beds2 baths1,302 sq ft
3 Seal Hbr #344, Winthrop, MA 02152
SOLD OCT 15, 2026
$665,000
E
2 beds2 baths1,471 sq ft
550 Pleasant St #510, Winthrop, MA 02152
SOLD MAR 2, 2026
$670,000
F
2 beds2 baths1,327 sq ft
3 Seal Harbor Rd #137, Winthrop, MA 02152

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$162,403

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

98.4%

0.5% MoM

Median sale price

$665K

$51K MoM

Avg. days on market

36d

9 days MoM

Recently sold homes

1 MoM

New listings for sale

NEW 27 HRS AGO
$675,000
3 beds1 bath1,354 sq ft
25 North Ave, Winthrop, MA 02152
$699,000
3 beds1.5 baths2,053 sq ft
65 Sunnyside Ave, Winthrop, MA 02152
$730,000
3 beds1.5 baths1,406 sq ft
9 Lincoln St, Winthrop, MA 02152
$835,000
6 beds3 baths2,424 sq ft
11-15 Sturgis St, Winthrop, MA 02152
$365,000
2 beds1 bath782 sq ft
200 Governors Dr #19, Winthrop, MA 02152
$865,000
2 beds2.5 baths1,806 sq ft
1001 Shirley St #2, Winthrop, MA 02152
$649,900
3 beds2 baths1,515 sq ft
19 Beal St, Winthrop, MA 02152
$869,000
3 beds2 baths1,925 sq ft
115 Read St #1, Winthrop, MA 02152
$889,000
3 beds2 baths2,916 sq ft
115 Read St #2, Winthrop, MA 02152
$629,900
2 beds1 bath1,166 sq ft
96 Marshall St, Winthrop, MA 02152
See all

Provided by Redfin

Sale history for 3 Seal Hbr Ph 31

Date

Event

Price

MLS PIN #73346942

Jul 24, 2025

Sold

$929,000

$523/sq ft

Mar 18, 2025

Listed

$929,000

$523/sq ft

MLS PIN #72989739

Aug 26, 2022

Sold

$850,000

$478/sq ft

Jun 29, 2022

Contingent

—

Jun 24, 2022

Price Changed

$880,000

$495/sq ft

Jun 1, 2022

Listed

$895,000

$504/sq ft

+30

Spectacular ocean and Boston skyline views await you from this beautiful unit. Southeast facing, 2-bedroom corner penthouse features an open living area, upgraded windows and sliding doors with ¼ inch thick, architectural windows, newly installed Thermador wifi controlled induction cook top making it an amazing entertainment space! This is a bi-level unit with master suites, skylights, and an inspired walk-in closet/laundry room. There is a 260 sf private patio and 2 deeded garages. 1 garage has cabinetry for additional storage. Three Seal Harbor is a full service, 24 hour concierge building with an indoor rooftop pool & Jacuzzi (same level as this unit), club room, work out area, craft room, an outdoor pool & jacuzzi, tennis courts, a BBQ area and an ocean-side gazebo.

MLS PIN #72137101

May 3, 2017

Sold

$700,000

$394/sq ft

Apr 2, 2017

Pending

—

Mar 29, 2017

Listed

$675,000

$380/sq ft

+25

Enjoy spectacular ocean and Boston skyline views from this beautiful unit that was completely renovated in 2014. This South East facing, 2-bedroom corner penthouse has everything the upscale buyer is seeking in a property, featuring an open living area, upgraded and customized kitchen that includes Medallion cabinetry, crystal knobs, superb functionality and a stunning red compressed quartz breakfast bar and prep area. An amazing entertainment space! This is a bi-level unit with 2 master suites, skylights, and an inspired walk-in closet/laundry room. There is a 260sf private patio and 2 deeded garages. 1 garage has cabinetry for additional storage. Seal Harbor 3 is a full service, 24 hour concierge building with an indoor rooftop pool & Jacuzzi (same level as this unit!), club room, work out area, craft room, an outdoor pool & jacuzzi, tennis courts, a BBQ area and an ocean-side gazebo.

MLS PIN #71355219

Jul 13, 2012

Sold

$506,250

$285/sq ft

Jun 27, 2012

Contingent

—

May 22, 2012

Price Changed

$550,000

$310/sq ft

Mar 22, 2012

Listed

$575,000

$324/sq ft

Public Records

Dec 5, 2008

Sold

$440,000

$248/sq ft

MLS PIN #70772481

Dec 11, 2008

Listing Removed

—

Dec 5, 2008

Sold

$440,000

$248/sq ft

Nov 22, 2008

Contingent

—

Jun 4, 2008

Listed

$489,000

$275/sq ft

MLS PIN #30451067

Aug 15, 2001

Sold

$495,000

$279/sq ft

Jun 27, 2001

Listing Removed

—

Oct 4, 2000

Listed

$495,000

$279/sq ft

MLS PIN #30303183

Jun 25, 1999

Sold

$272,000

$153/sq ft

Mar 24, 1999

Listing Removed

—

Mar 22, 1999

Listed

$299,000

$168/sq ft

Public Records

Apr 20, 1988

Sold

$340,000

$191/sq ft

Year

Property tax

Land + Additions

Assessment*

2023

$9,551 (+1.0%)

$892,600

2022

$9,457 (−2.1%)

$804,200

2021

$9,657 (+3.6%)

$761,600

2020

$9,322 (−1.1%)

$738,700

2019

$9,422 (−0.7%)

$714,900

2018

$9,484 (+10.2%)

$669,800

2017

$8,604 (+2.6%)

$597,100

2016

$8,387 (+18.8%)

$545,700

2014

$7,062 (−1.6%)

$453,300

2013

$7,179 (+2.9%)

$481,500

2012

$6,977 (+24.5%)

$481,500

2011

$5,603 (−16.8%)

$406,000

2010

$6,737 (+19.5%)

$530,500

2009

$5,637

$565,400

Tax history for 3 Seal Hbr Ph 31

Year

Property tax

Land + Additions

Assessment*

2023

$9,551 (+1.0%)

$892,600

2022

$9,457 (−2.1%)

$804,200

2021

$9,657 (+3.6%)

$761,600

2020

$9,322 (−1.1%)

$738,700

2019

$9,422 (−0.7%)

$714,900

2018

$9,484 (+10.2%)

$669,800

2017

$8,604 (+2.6%)

$597,100

2016

$8,387 (+18.8%)

$545,700

2014

$7,062 (−1.6%)

$453,300

2013

$7,179 (+2.9%)

$481,500

2012

$6,977 (+24.5%)

$481,500

2011

$5,603 (−16.8%)

$406,000

2010

$6,737 (+19.5%)

$530,500

2009

$5,637

$565,400

*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

2.5

Stories

Lot width

—

Lot depth

—

Lot size

—

Year renovated

1989

Sq. Ft.

1,777

Year built

1987

Style

Condo/Co-op

County

APN

1425419

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Aug 25, 2023.

Property details

Parking

Parking Information
Has Garage
Has Open Parking
# of Garage Spaces: 2
# of Covered Spaces: 2
AttachedGarageYN: Yes
Parking Features: Attached, Under, Garage Door Opener, Deeded, Off Street, Tandem, Common, Guest, Paved, Exclusive Parking

Interior

Bathroom Information
# of Bathrooms (Full): 2
# of Bathrooms (Half): 1
Master Bathroom Features: Yes

Basement Information
Basement: Y

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

Interior Features
# of Rooms (Total): 4
Door Features: Insulated Doors
Window Features: Insulated Windows, Storm Window(s)
Flooring: Wood, Tile, Hardwood

Exterior

Building Information
Building Name: Seal Harbor
Building Area (Total): 1,777
Construction Materials: Brick
StructureType: High-Rise
Stories (Total): 10
Year Built Source: Public Records
Year Built Details: Actual
Lead Paint: None

Exterior Features
Fencing: Security
Roof: Rubber
Patio And Porch Features: Deck, Deck - Roof, Deck - Composite, Deck - Access Rights
Exterior Features: Deck, Deck - Roof, Deck - Composite, Deck - Access Rights, Balcony, Hot Tub/Spa, Garden, Gazebo, Outdoor Shower, Professional Landscaping, Sprinkler System, Tennis Court(s)

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

Property Information
Accessibility Features: Accessible Entrance
PropertySubType: Condominium
Property AttachedYN: Yes
Entry Level: 10
Entry Location: Unit Placement(Upper,Front)
Security Features: Intercom, TV Monitor, Doorman, Security Guard, Security Gate, Concierge
Other Structures: Gazebo
Has Waterview
Bay, Harbor, Ocean, Private

Lot Information
WaterfrontYN: Yes

Financial

Tax Information
Tax Annual Amount: $9,673.92
Tax Year: 2025

Utilities

Utility Information
Utilities: for Electric Range, for Electric Oven, for Electric Dryer
Sewer: Public Sewer
Water Source: Public
Electric: 110 Volts, Circuit Breakers

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

Location

HOA Information
Association Fee: $1,404
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), Park, Recreation Facilities, Fitness Center, Sauna/Steam, Clubroom, Trail(s), Beach Rights, Storage, Garden Area, Clubhouse

Location Information
Directions: Left on Spitbook, right on Daniel Webster. Or Google maps.
UnparsedAddress: 3 Seal Harbor, Winthrop MA 02152

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

Public facts

Beds: 2
Baths: 2.5
Sq. Ft.: 1,777
Stories: 1.0
Lot Size: —
Style: Condo/Co-op
Year Built: 1987
Year Renovated: 1989
County: —
APN: 1425419

Home facts updated by county records on Aug 25, 2023

Other

Miscellaneous Information
Heat Zones: 3

Listing Information
Exclusions: Pets - Absolutely No Dogs Permitted. No Smoking Or Vaping.
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

$889,000 – $1.08M

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Home values near 3 Seal Hbr Ph 31

Data from public records.

Address	Redfin Estimate
3 Seal Harbor Road Unit 135, Winthrop, MA 2 Beds \| 2 Baths \| 1370 Sq. Ft.	$588,593
3 Seal Harbor Road Unit 248, Winthrop, MA 2 Beds \| 2 Baths \| 1320 Sq. Ft.	$660,607
3 Seal Harbor Road Unit 343, Winthrop, MA 1 Beds \| 1 Baths \| 823 Sq. Ft.	$474,203
3 Seal Harbor Road Unit 531, Winthrop, MA 1 Beds \| 1.5 Baths \| 1033 Sq. Ft.	$513,122
3 Seal Harbor Road Unit 545, Winthrop, MA 2 Beds \| 2 Baths \| 1310 Sq. Ft.	$554,422
3 Seal Harbor Road Unit 634, Winthrop, MA 1 Beds \| 1 Baths \| 840 Sq. Ft.	$503,747
3 Seal Harbor Road Unit 736, Winthrop, MA 3 Beds \| 2.5 Baths \| 1674 Sq. Ft.	$851,785

Address	Redfin Estimate
3 Seal Harbor Road Unit 231, Winthrop, MA 1 Beds \| 1.5 Baths \| 1033 Sq. Ft.	$519,179
3 Seal Harbor Road Unit 333, Winthrop, MA 2 Beds \| 2 Baths \| 1286 Sq. Ft.	$630,214
3 Seal Harbor Road Unit 347, Winthrop, MA 2 Beds \| 2 Baths \| 1320 Sq. Ft.	$596,742
3 Seal Harbor Road Unit 543, Winthrop, MA 1 Beds \| 1 Baths \| 838 Sq. Ft.	$488,197
3 Seal Harbor Road Unit 631, Winthrop, MA 1 Beds \| 1.5 Baths \| 1033 Sq. Ft.	$530,012
3 Seal Harbor Road Unit 645, Winthrop, MA 2 Beds \| 2 Baths \| 1310 Sq. Ft.	$580,531
3 Seal Harbor Road Unit 737, Winthrop, MA 2 Beds \| 2 Baths \| 1318 Sq. Ft.	$652,433

Address	Redfin Estimate
3 Seal Harbor Road Unit 232, Winthrop, MA 1 Beds \| 2 Baths \| 1263 Sq. Ft.	$619,687
3 Seal Harbor Road Unit 334, Winthrop, MA 1 Beds \| 1 Baths \| 840 Sq. Ft.	$511,394
3 Seal Harbor Road Unit 436, Winthrop, MA 3 Beds \| 2.5 Baths \| 1674 Sq. Ft.	$1,118,670
3 Seal Harbor Road Unit 544, Winthrop, MA 2 Beds \| 2 Baths \| 1302 Sq. Ft.	$625,086
3 Seal Harbor Road Unit 632, Winthrop, MA 1 Beds \| 2 Baths \| 1263 Sq. Ft.	$635,283
3 Seal Harbor Road Unit 734, Winthrop, MA 1 Beds \| 1 Baths \| 840 Sq. Ft.	$502,973
3 Seal Harbor Road Unit 741, Winthrop, MA 1 Beds \| 1 Baths \| 871 Sq. Ft.	$440,466

Property information provided by MLS PIN when last listed in 2025. This data may not match . Learn more.

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