Overview Property Details Payment Calculator Walkability

Add to favorites

Remove from favorites
Send to Friend
Watch changes on this property

Active

3 Seal Harbor Rd, Winthrop MA 02152

$1,230,000

Estimated $8,575/month Calculator

Condo

3 Bedrooms

Baths

1913

Total Parking: 4 (2 Garage)

Built in 1987

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.

This home has been viewed 20 times

Last Checked: August 7th, 2026 at 8:08pm (Source: MLS PIN #73560746)

Garage Parking

Green Features

Air Conditioning

Waterview

Lead Paint Free

General Information for 3 Seal Harbor Rd, Winthrop MA 02152

Listing ID73560746

Property TypeCondominium

Price1230000 ($642.97/SqFt)

Building Style2/3 Family

CityWinthrop

CountySuffolk

MLS AreaWinthrop Highlands

Neighborhood(s)

Total Parking4 (2 Garage)

Unit Level9

Levels in Unit2

Year Built1987

Year Built SourcePublic Records

Year Built DetailsActual

Building Construction StatusReady for Occupancy

ZoningRes

Unit Features for 3 Seal Harbor Rd, Winthrop MA 02152

Approximate Living Area Total1913

Living Area Includes BasementNo

Rooms6

Bedrooms3

Primary En Suite BathroomYes

BasementFull

Cooling1, Split

LaundryArchway

Fireplaces

Outdoor Space

FlooringTile

Electric220 Volts

AppliancesRange

Condo Association Features for 3 Seal Harbor Rd, Winthrop MA 02152

Complex NameSeal Harbor Condominiums

Pet PolicyNot Allowed

Building ManagementDeveloper Advisory Board

Building Construction StatusReady for Occupancy

Number of Units117

Year Built1987

Year Built DetailsActual

Year Built SourcePublic Records

WaterPublic

SewerPublic Sewer

Parking Features1

Building AmenitiesBeach Rights

Disclosures for 3 Seal Harbor Rd, Winthrop MA 02152

Lead PaintNone

UFFI

Living Area Includes BasementNo

Living Area Disclosure

Building Area SourcePublic Records

Special Listing Conditions

ExclusionsWasher / Dryer

Compensation Based On

Documents AvailablePerc Test

Financial Information for 3 Seal Harbor Rd, Winthrop MA 02152

Association Fee

Optional Fee0

Association Fee IncludesLandscaping

Optional Fee Includes

Association Fee FrequencyMonthly

Assessed Value$1,072,800

Real Estate Tax11950.99

Tax Year2026

Location Information for 3 Seal Harbor Rd, Winthrop MA 02152

Neighborhood(s)

MLS AreaWinthrop Highlands

Area AmenitiesWalk/jog Trails

Contact Information for 3 Seal Harbor Rd, Winthrop MA 02152

Agent

Name: Cathie Curran

Office

Name: Charlesgate Realty Group, llc

Phone: 617-587-0100

Payment Calculator

, Interest

Property Taxes 995.92

Principal & Interest 7578.87

HOA Dues

Term

Interest

Home Price

Down Payment

Exclusive Listing Agent

Charlesgate Realty Group, llc

Cathie Curran

Agent Phone

Office Phone

(617) 587-0100

Text Agent Call Agent Call Office

Array
(
    [acres] => Approx. 0 acres (0 SqFt)
    [add_date] => 2026-08-07 20:08:36
    [address] => Seal Harbor Rd
    [agent] => Array
        (
            [address] => 5 Loring Road
            [city] => Winthrop
            [id] => BB600069
            [name] => Cathie Curran
            [national_association] => 449500291
            [office] => NB1520
            [state] => MA
            [zip] => 02152
        )

[apod_available] => Array
        (
        )

[appliances] => Array
        (
            [0] => Range
        )

[approx_living_area_total] => 1913
    [approx_lot_size_acres] => 0
    [approx_lot_size_sqft] => 0
    [assessed_value] => $1,072,800
    [association] => 
    [association_fee] => Array
        (
        )

[association_fee_frequency] => Array
        (
            [0] => Monthly
        )

[association_fee_includes] => Array
        (
            [0] => Landscaping
        )

[association_required] => Array
        (
        )

[available_date] => 
    [available_now] => 0
    [basement] => Array
        (
            [0] => Full
        )

[bathrooms] => 
    [bedrooms] => 3
    [building_amenities] => Array
        (
            [0] => Beach Rights
        )

[building_area_source] => Array
        (
            [0] => Public Records
        )

[building_management] => Array
        (
            [0] => Developer Advisory Board
        )

[building_debug] => 
    [building_id] => 
    [building_parent] => 0
    [building_name] => Seal Harbor Condominiums
    [building_name_from_address] => 
    [building_url] => 
    [buyer_agent_compensation] => 
    [buyer_agent_id] => 
    [buyer_office_id] => 
    [c_style] => Array
        (
        )

[c_type] => Array
        (
            [0] => Condominium
        )

[cap_rate] => 
    [city] => Winthrop
    [community_features] => Array
        (
            [0] => Walk/jog Trails
        )

[compensation_based_on] => Array
        (
        )

[complex_complete] => Array
        (
            [0] => Ready for Occupancy
        )

[construction_materials] => Array
        (
            [0] => Frame
        )

[construction_status] => 
    [cooling] => Array
        (
            [0] => 1
            [1] => Split
        )

[cooperating_agent_commission] => Array
        (
        )

[county] => Suffolk
    [cultivation_acres] => 
    [date_available_note] => 
    [deposit_amount] => Array
        (
        )

[deposit_required] => Array
        (
        )

[deqe] => 
    [description] => 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.
    [disclosures] => 
    [documents_available] => Array
        (
            [0] => Perc Test
        )

[electric] => Array
        (
            [0] => 220 Volts
        )

[electric_expense] => Array
        (
        )

[elementary_school] => 
    [en_suite_bath] => Array
        (
            [0] => Yes
        )

[energy_features] => 
    [entry_level] => Array
        (
        )

[estimated_monthly_payment] => 
    [exclusions] => Array
        (
            [0] => Washer / Dryer
        )

[exterior_features] => Array
        (
            [0] => Porch
        )

[facilitator_compensation] => 
    [fee_paid_by_tennant] => 
    [financial_data_source] => Array
        (
        )

[fireplaces] => Array
        (
        )

[first_month_required] => Array
        (
        )

[floor_number] => 0
    [flooring] => Array
        (
            [0] => Tile
        )

[for_sale_by_owner] => 
    [foundation_area] => 
    [foundation_materials] => Array
        (
        )

[frontage_length] => 
    [full_baths] => 
    [garage_parking] => 2
    [gas] => Array
        (
        )

[gas_expense] => Array
        (
        )

[gross_income] => Array
        (
        )

[half_baths] => 
    [handicap_access] => 
    [heating] => 
    [heating_expense] => Array
        (
        )

[high_school] => 
    [horse_features] => Array
        (
            [0] => River
        )

[horse_permitted] => 0
    [hot_water] => Array
        (
        )

[id] => 
    [insurance_expense] => Array
        (
        )

[insurance_required] => Array
        (
        )

[interior_features] => Array
        (
            [0] => French Doors
        )

[last_month_required] => Array
        (
        )

[last_sync_date] => 2026-08-07 20:08:36
    [laundry_features] => Array
        (
            [0] => Archway
        )

[lead_paint] => Array
        (
            [0] => None
        )

[lease_term] => Array
        (
        )

[levels_in_unit] => 2
    [living_area] => 
    [living_area_disclosure] => Array
        (
        )

[living_area_includes_basement] => Array
        (
            [0] => No
        )

[lot_features] => Array
        (
        )

[management_expense] => Array
        (
        )

[middle_school] => 
    [miscellaneuos_expense] => Array
        (
        )

[mls_area] => Winthrop Highlands
    [mls_id] => 73560746
    [neighborhoods] => 
    [net_income_calc] => -11950
    [net_operating_income] => Array
        (
        )

[number_of_lots] => Array
        (
        )

[number_of_units] => 117
    [office] => Array
        (
            [id] => NB1520
            [name] => Charlesgate Realty Group, llc
            [phone] => 617-587-0100
        )

[operating_expense] => Array
        (
        )

[optional_fee_includes] => Array
        (
        )

[optional_price] => 0
    [outdoor_space_available] => Array
        (
        )

[owner_occupancy_source] => 
    [parking_features] => Array
        (
            [0] => 1
        )

[pasture_area] => 
    [patio_and_porch] => Array
        (
            [0] => Covered
        )

[perc_test] => Array
        (
        )

[perc_test_date] => 
    [pet_policy] => Array
        (
            [0] => Not Allowed
        )

[phone] => 
    [pool_features] => Array
        (
            [0] => Association
        )

[price] => 1230000
    [price_per_sqft] => 642.97
    [price_per_unit] => 10512.820512821
    [private_pool] => 
    [property_sub_type] => Array
        (
            [0] => Condominium
        )

[real_estate_tax] => 11950.99
    [references_required] => Array
        (
        )

[rent_includes] => Array
        (
        )

[repair_maintenance_expense] => Array
        (
        )

[road_frontage_type] => Array
        (
        )

[roof_material] => Array
        (
            [0] => Asphalt/fiberglass Shingles
        )

[rooms] => 6
    [schools] => 
    [senior_community] => 
    [sewer] => Array
        (
            [0] => Public Sewer
        )

[sewer_expense] => Array
        (
        )

[short_sale] => Array
        (
        )

[special_listing_conditions] => Array
        (
        )

[state] => Massachusetts
    [state_code] => MA
    [status] => Array
        (
            [0] => Active
        )

[street_number] => 3
    [structure_type] => Array
        (
            [0] => 2/3 Family
        )

[style] => Array
        (
        )

[subagent_compensation] => 
    [tag_accessible_features] => 
    [tag_air_conditioning] => 1
    [tag_association_pool] => 
    [tag_beach_access] => 
    [tag_beach_front] => 
    [tag_elevator] => 
    [tag_equestrian] => 
    [tag_garage_parking] => 1
    [tag_generator] => 
    [tag_green_features] => 1
    [tag_laundry] => 1
    [tag_lead_paint_free] => 1
    [tag_loft] => 
    [tag_pet_friendly] => 
    [tag_pre_construction] => 
    [tag_private_outdoor_space] => 
    [tag_private_pool] => 
    [tag_professional_management] => 
    [tag_recently_renovated] => 
    [tag_senior_community] => 
    [tag_townhouse] => 
    [tag_waterfront] => 1
    [tag_waterview] => 1
    [tax_year] => 2026
    [team] => 
    [team_agents] => Array
        (
        )

[terms] => Array
        (
        )

[timber_acres] => 
    [title_5] => 
    [total_gross_expense] => 11950
    [total_gross_income] => 0
    [total_parking] => 4 (2 Garage)
    [trash_expense] => Array
        (
        )

[travel_routes] => 
    [uffi] => Array
        (
        )

[unit_1_bathrooms] => 
    [unit_1_bedrooms] => 
    [unit_1_floor] => 
    [unit_1_lease] => Array
        (
        )

[unit_1_levels] => 
    [unit_1_rent] => Array
        (
        )

[unit_2_bathrooms] => 
    [unit_2_bedrooms] => 
    [unit_2_floor] => 
    [unit_2_lease] => Array
        (
        )

[unit_2_levels] => 
    [unit_2_rent] => Array
        (
        )

[unit_3_bathrooms] => 
    [unit_3_bedrooms] => 
    [unit_3_floor] => 
    [unit_3_lease] => Array
        (
        )

[unit_3_levels] => 
    [unit_3_rent] => Array
        (
        )

[unit_4_bathrooms] => 
    [unit_4_bedrooms] => 
    [unit_4_floor] => 
    [unit_4_lease] => Array
        (
        )

[unit_4_levels] => 
    [unit_4_rent] => Array
        (
        )

[unit_level] => 9
    [unit_number] => PH33
    [units_owner_occupied] => 
    [unparsed] => 3 Seal Harbor Rd, Winthrop MA 02152
    [utilities] => Array
        (
            [0] => 110 Volts
        )

[view] => Array
        (
        )

[water] => Array
        (
            [0] => Public
        )

[water_expense] => Array
        (
        )

[water_views] => Array
        (
            [0] => Yes
        )

[water_views_features] => Array
        (
            [0] => Bay
        )

[waterfront] => 1
    [waterfront_features] => Array
        (
            [0] => River
        )

[raw] => 
)

EXIT

38 More Photos