$5,130,000
SOLD SEP 4, 2025

EchelonSeaport Towers 1 & 2 135 Seaport Blvd Unit PH 3C Floor 25 Boston, MA 02210

Seaport Neighborhood
3 Beds
2.5 Baths
2,040 Sq Ft
$4,700/mo HOA Fee

Recently Sold

$2,515 Per Sq Ft

5% Below List Price

125 Days on Market

Highlights

  • Concierge
  • Marina View
  • Heated Indoor Pool
  • Marina
  • Fitness Center
  • 3-minute walk to Seaport Common

About This Home

As of September 2025

Spectacular penthouse in the heart of Boston’s vibrant Seaport—surrounded by award-winning restaurants, luxury boutiques, and waterfront attractions. This rare offering features 3 bedrooms, including a flexible third currently used as a den/media room. Soaring ceilings, wide-plank hardwood flrs, and floor-to-ceiling windows create an airy, sun-drenched atmosphere with sweeping city and harbor views and private terrace. A sleek chef’s kitchen with premium appliances anchors the open-concept layout. The elegant primary suite includes custom closets and a spa-inspired bath. Enjoy 5-star amenities: 50k sq.ft - indoor & outdoor pools, fitness center with classes, basketball court, golf simulator, 22nd-floor Sky Lounge, and landscaped terraces with fire pits and grills. 24/7 concierge, valet, and doorman. Includes 2 garage parking spaces—one self-park (rare) and one valet. Easy access to highways & Logan Airport. A rare opportunity for elevated living in Boston’s most exciting neighborhood.

Last Agent to Sell the Property

Collin Sullivan

William Raveis R.E. & Home Services Listed on: 03/25/2025

William Raveis R.E. & Home Services

Co-Listed By

Daniel Resop

William Raveis R.E. & Home Services

Last Buyer's Agent

Miaoli Deng

MLJ Real Estate Service LLC

Property Details

Home Type

  • Condominium

Est. Annual Taxes

  • $54,905

Year Built

  • Built in 2018

HOA Fees

  • $4,700 Monthly HOA Fees

Parking

  • 2 Car Attached Garage
  • Tuck Under Parking
  • Heated Garage

Property Views

  • Marina
  • Harbor

Home Design

  • Entry on the 25th floor

Interior Spaces

  • 2,040 Sq Ft Home
  • 1-Story Property
  • 1 Fireplace

Bedrooms and Bathrooms

  • 3 Bedrooms

Pool

  • Heated Indoor Pool
  • Heated In Ground Pool

Utilities

  • Central Air
  • Heat Pump System

Additional Features

  • Balcony
  • No Units Above
  • Property is near public transit

Listing and Financial Details

  • Assessor Parcel Number W:06 P:02642 S:592,5175554

Community Details

Overview

  • Association fees include heat, gas, water, sewer, insurance, security, maintenance structure, ground maintenance, snow removal, trash
  • 195 Units
  • High-Rise Condominium
  • Echelon Seaport Community

Amenities

  • Concierge
  • Doorman
  • Shops
  • Sauna
  • Elevator
  • Community Storage Space

Recreation

  • Marina
  • Fitness Center
  • Community Pool
  • Bike Trail

Pet Policy

  • Call for details about the types of pets allowed

Security

  • Resident Manager or Management On Site

Property Details

Home Type

Condominium

Est. Annual Taxes

$54,905

Year Built

Built in 2018

Lot Details

0

HOA Fees

$4,700 per month

Parking

2

Listing Details

  • Property Type: Residential
  • Property Sub Type: Condominium
  • Structure Type: High-Rise
  • Year Built: 2018
  • Entry Level: 25
  • Year Built Details: Actual
  • Special Features: None
  • Stories: 1

Interior Features

  • Fireplace YN: Yes
  • Fireplaces: 1
  • Total Bedrooms: 3
  • Full Bathrooms: 2
  • Half Bathrooms: 1
  • Total Bathrooms: 3
  • Basement: N
  • Above Grade Finished Sq Ft: 2040
  • Living Area: 2040
  • Spa YN: No
  • Stories Total: 1
  • MAIN LO: M59500
  • MAIN SO: AN6655

Exterior Features

  • Exterior Features: Balcony
  • Common Walls: No One Above
  • Home Warranty YN: No
  • Pool Features: Association, In Ground, Indoor, Heated
  • Waterfront YN: No
  • Waterview Flag: Yes

Garage/Parking

  • Garage Spaces: 2
  • Attached Garage YN: Yes
  • Carport Y N: No
  • Covered Parking Spaces: 2
  • Garage YN: Yes
  • Parking Features: Under, Heated Garage

Utilities

  • Sewer: Public Sewer
  • Cooling: Central Air
  • Heating: Heat Pump
  • Cooling Y N: Yes
  • Heating YN: Yes
  • Security Features: Doorman, Concierge
  • Water Source: Public

Condo/Co-op/Association

  • Association Amenities: Pool, Elevator(s), Fitness Center, Sauna/Steam, Clubroom, Storage
  • Association Fee: 4700
  • Association Fee Frequency: Monthly
  • Community Features: Public Transportation, Shopping, Pool, Bike Path, Highway Access, Marina
  • Senior Community YN: No
  • MANAGEMENT: Professional - On Site

Fee Information

  • Association Fee Includes: Heat, Gas, Water, Sewer, Insurance, Security, Maintenance Structure, Maintenance Grounds, Snow Removal, Trash

Lot Info

  • Parcel Number: W:06 P:02642 S:592,5175554
  • Zoning: CD
  • Farm Land Area Units: Square Feet
  • Lot Size Units: Acres
  • Property Attached YN: Yes
  • OUTDOOR SPACE AVAILABLE: Yes - Private

Rental Info

  • Pets Allowed: Yes w/ Restrictions

Tax Info

  • Tax Year: 2025
  • Tax Annual Amount: 54905

Multi Family

  • Number Of Units Total: 195
  • Basement Included Sq Ft: No
  • Waterview: Harbor, Marina

Ownership History

Date Name Owned For Owner Type

Purchase Details

Listed on
Mar 25, 2025
Closed on
Sep 3, 2025
Sold by
Steilacoom 88 T and Steilacoom Kimler
Bought by
Gong Baiyu
Seller's Agent
Collin Sullivan
William Raveis R.E. & Home Services
Buyer's Agent
Miaoli Deng
MLJ Real Estate Service LLC
List Price
$5,395,000
Sold Price
$5,130,000
Premium/Discount to List
-$265,000
-4.91%
Views
22

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Avg. Annual Appreciation
-12.26%
Original Mortgage
$200,000
Outstanding Balance
$200,000
Interest Rate
6.5%
Mortgage Type
New Conventional
Estimated Equity
$4,830,366

Purchase Details

Closed on
Sep 1, 2021
Sold by
Boston Seaport M1 & 2 Land
Bought by
Steilacoom 88 T and Steilacoom Kimler
Source: Public Records

Range of Values:

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Average Value
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List Price
Sold Price
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Home Values in the Area

Source: Public Records

Average Home Value in this Area

Source: Public Records

Purchase History

Date Type Sale Price Title Company
Deed $5,130,000 --
Deed $5,130,000 --
Condominium Deed $4,789,100 None Available
Source: Public Records

Mortgage History

Date Status Loan Amount Loan Type
Open $200,000 New Conventional
Closed $200,000 New Conventional
Source: Public Records

Property History

Date Event Price List to Sale Price per Sq Ft Prior Sale
09/04/2025 09/04/25 Sold $5,130,000 -4.9% $2,515 / Sq Ft
07/28/2025 07/28/25 Pending -- -- --
03/25/2025 03/25/25 For Sale $5,395,000 +12.7% $2,645 / Sq Ft
11/18/2021 11/18/21 Sold $4,789,100 0.0% $2,338 / Sq Ft View Prior Sale
10/06/2021 10/06/21 Pending -- -- --
10/05/2021 10/05/21 For Sale $4,789,100 -- $2,338 / Sq Ft
Source: MLS Property Information Network (MLS PIN)

Tax History Compared to Growth

Source: Public Records

Tax History

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2025 $54,905 $4,741,400 $0 $4,741,400
2024 $48,509 $4,450,400 $0 $4,450,400
2023 $47,298 $4,403,900 $0 $4,403,900
2022 $31,468 $2,892,300 $0 $2,892,300
Source: Public Records

Agents Affiliated with this Home

  • Collin Sullivan

    Seller's Agent in 2025

    Collin Sullivan

    William Raveis R.E. & Home Services

    (617) 529-6622

    3 in this area

    83 Total Sales

    Collin Sullivan
    Section Image
  • Daniel Resop

    Seller Co-Listing Agent in 2025

    Daniel Resop

    William Raveis R.E. & Home Services

    (617) 266-5200

    2 in this area

    100 Total Sales

    Daniel Resop
    Section Image
  • Miaoli Deng

    Buyer's Agent in 2025

    Miaoli Deng

    MLJ Real Estate Service LLC

    (617) 606-2590

    4 in this area

    52 Total Sales

    Miaoli Deng
    Section Image
  • Patrick Cutter

    Seller's Agent in 2021

    Patrick Cutter

    MP Boston Marketing LLC

    (617) 542-1555

    178 in this area

    203 Total Sales

    Patrick Cutter
    Section Image

  • L

    Buyer's Agent in 2021

    Laura Rodriguez

    The Collaborative Companies

    (787) 237-3140

    79 in this area

    79 Total Sales

    Laura Rodriguez
    Section Image
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About EchelonSeaport Towers 1 & 2

Map

Source: MLS Property Information Network (MLS PIN)

MLS Number: 73349558

MLS Property Information Network (MLS PIN)

APN: CBOS W:06 P:02642 S:592

Massachusetts Suffolk County Boston 02210 Seaport

135 Seaport Blvd Unit PH 3C, Boston, MA

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