For sale

$44,500,000

150 Seaport Blvd #Gph, Boston, MA 02210

6beds

10,609sqft

$325,980/mo

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Condominium

Built in 2022

-- sqft lot

$24,522,500 Zestimate^®

$4,195/sqft

$22,930/mo HOA

What's special

Double-height great roomSoaring floor-to-ceiling windows

Experience a new echelon of luxury living at The Grand Penthouse, the crown jewel of the St. Regis Residences. Encompassing over 10,000 sq ft across 2 dramatic levels, this one-of-a-kind home sits atop Boston’s iconic Seaport, offering panoramic views of Boston Harbor and the city skyline through soaring floor-to-ceiling windows. Designed with extraordinary attention to detail, the residence features a double-height great room, a sculptural curved floating staircase with glass railings, and a grand foyer with an Italian marble radial inlay floor. Every element is curated for refined living and entertaining at scale. The outdoor living experience is equally extraordinary, including a custom infinity-edge pool with a clear acrylic bottom, and a retractable Libart International glass roof, and sweeping water views from every angle. Blending the privacy of a custom home with the legendary service of the St. Regis brand, The Grand Penthouse is a truly rare offering Boston has never seen.

25 days
6,650
276

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 6
Bathrooms: 10
Full bathrooms: 8
1/2 bathrooms: 2

Primary bathroom

Features: Yes

Heating

Forced Air, Fan Coil

Cooling

Central Air

Appliances

Included: Range, Oven, Dishwasher, Disposal, Microwave, Refrigerator, Freezer, Washer, Dryer, Wine Refrigerator
Laundry: In Unit

Features

Sauna/Steam/Hot Tub, Wet Bar, Wired for Sound, Elevator
Flooring: Marble
Has basement: No
Number of fireplaces: 1
Common walls with other units/homes: No One Above

Interior area

Total structure area: 10,609
Total interior livable area: 10,609 sqft
Finished area above ground: 10,609

Property

Parking

Total spaces: 4
Parking features: Attached
Attached garage spaces: 4

Accessibility

Accessibility features: Accessible Entrance

Features

Patio & porch: Deck - Roof, Deck - Roof + Access Rights, Covered
Exterior features: Deck - Roof, Deck - Roof + Access Rights, Covered Patio/Deck, Hot Tub/Spa, Decorative Lighting, City View(s)
Pool features: Association, In Ground, Indoor, Heated
Has spa: Yes
Spa features: Hot Tub/Spa
Has view: Yes
View description: City, Water, Dock/Mooring, Ocean
Has water view: Yes
Water view: Dock/Mooring,Ocean,Water
Waterfront features: Waterfront, Ocean, Harbor, Dock/Mooring, Deep Water Access, Marina, Public, Private, 1 to 2 Mile To Beach, Beach Ownership(Public)

Details

Parcel number: 5233770
Zoning: 0102

Construction

Type & style

Home type: Condo
Property subtype: Condominium
Attached to another structure: Yes

Materials

Stone

Condition

Year built: 2022

Utilities & green energy

Sewer: Public Sewer
Water: Public
Utilities for property: for Gas Range

Community & HOA

Community

Features: Public Transportation, Shopping, Pool, Park, Highway Access, Marina, Public School, T-Station
Security: Intercom, Doorman, Concierge, Security System

HOA

Amenities included: Hot Water, Pool, Elevator(s), Fitness Center, Sauna/Steam, Clubroom, Parking, Clubhouse
Services included: Gas, Water, Sewer, Insurance, Security, Maintenance Structure, Trash, Reserve Funds
HOA fee: $22,930 monthly

Location

Region: Boston

Financial & listing details

Price per square foot: $4,195/sqft
Tax assessed value: $35,911,700
Annual tax amount: $420,004
Date on market: 8/25/2026

Estimated market value

$24,522,500

$18.64M - $32.86M

Not available

Price history

Date	Event	Price
8/25/2026	Listed for sale	$44,500,000$4,195/sqft
Source: MLS PIN #73567770 Report a problem
7/1/2026	Listing removed	$44,500,000$4,195/sqft
Source: MLS PIN #73383587 Report a problem
1/28/2026	Price change	$44,500,000-10.1%$4,195/sqft
Source: MLS PIN #73383587 Report a problem
6/2/2025	Listed for sale	$49,500,000$4,666/sqft
Source: MLS PIN #73383587 Report a problem