3 Seal Harbor # 336 Winthrop, MA ^$ 859,900

3 Seal Harbor # 336

^$ 859,900

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3 Seal Harbor # 336

Winthrop, MA, 02152

^$ 859,900

Bedrooms2 Baths1.1 Sq 1,674

Monthly Estimate*

^$ 5,429

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Condo for sale in Winthrop, MA

for $859,900 with 2 bedrooms and 1 full bath, 1 half bath. This 1,674 square foot condo was built in 1987.

A rare offering at the prestigious Seal Harbor III, this exceptional corner residence captures breathtaking panoramic water views from an expansive, light filled interior and a private balcony - perfect for enjoying morning coffee, evening sunsets, or simply taking in the every changing waterfront scenery. Completely reimagined with a full gut reno in 2010, the home showcases timeless design, an open concept floor plan, and impeccable craftsmanship throughout. Thoughtfully curated with luxurious finishes and custom details, the residence is designed for both elegant entertaining and effortless everyday living. The spa-inspired primary bath features a steam shower, while the versatile second bedroom-equally suited as a den or private office-is enhanced by a striking custom leather accent wall. Seal Harbor III offers an unmatched lifestyle with exceptional amenities, including 24 hour concierge deeded garage parking (D41T), outdoor parking, heated indoor pool/hot tub, outdoor pool, storage closet, clubhouse, tennis courts and so much more.

Condo Active

Price

^$ 859,900

Bedrooms

Full Bath

Half Bath

Property Type

Condo

Taxes

^$ 10,484

Style

High-Rise

Year Built

1987

Town/City

Winthrop

County/Region

Suffolk

MLS | Web ID

73554136

List By

Cathie Curran

Listing Agent

Charlesgate Realty Group, Llc

Broker

Affordability Calculator

$6,303

Per Month

Monthly Principal & Interest: $5,429
Monthly Property Taxes: $874
Monthly Home Insurance: --

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Default based on a 30-year fixed rate of 6.49% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.

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Trends

Condo listings in Winthrop, MA

Average List Price ^$561,558

Percent of Sale Price 35%

About Winthrop, MA

17,967 Population

-2% Since 2002

^$65,929 Median Income

46.08 Median Age

21% Households with Children

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Trends Information provided by ATTOM Data Solutions.

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Pricing History

Date	Price	Price Change	Description
7/23/2026	$859,900		Listed Price

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3 Seal Harbor # 336, Winthrop, MA, 02152 is a Condo for sale at $859,900 with 1,674 sqft. 3 Seal Harbor # 336 has 2 bedrooms, 1.1 baths, and was built in 1987. The property's zip code is 02152 which is in Winthrop, MA

*Information deemed reliable but not guaranteed.

Financial calculator disclaimer: Default based on a 30-year fixed rate of 6.49% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.

Data is updated as of 7/24/2026.

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The property listing data and information, or the Images, set forth herein were provided to MLS Property Information Network, Inc. from third party sources, including sellers, lessors and public records, and were compiled by MLS Property Information Network, Inc. The property listing data and information, and the Images, are for the personal, non-commercial use of consumers having a good faith interest in purchasing or leasing listed properties of the type displayed to them and may not be used for any purpose other than to identify prospective properties which such consumers may have a good faith interest in purchasing or leasing. MLS Property Information Network, Inc. and its subscribers disclaim any and all representations and warranties as to the accuracy of the property listing data and information, or as to the accuracy of any of the Images, set forth herein.

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3 Seal Harbor # 336

Condo for sale in Winthrop, MA

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