Pending

$4,599,000

431 Marlborough St #Penthouse, Boston, MA 02115

3beds

3,077sqft

$32,750/mo

Get pre-qualified

Condominium, Townhouse, Rowhouse

Built in 1885

-- sqft lot

$4,217,600 Zestimate^®

$1,495/sqft

$2,004/mo HOA

What's special

Private walk-out deckBeautifully appointed custom kitchenSkylit dining areaSoaring ceilingsThree spacious bedrooms

This exceptional penthouse duplex seamlessly blends the timeless elegance of Back Bay architecture with the comfort and sophistication of modern living. Offering direct elevator access to both levels, the residence encompasses over 3,000 square feet of thoughtfully designed living space. The upper level unfolds as a bright, open living and entertaining space highlighted by soaring ceilings, a fireplaced living room, a skylit dining area, and a beautifully appointed custom kitchen, with a full bath conveniently located on the same level. Oversized glass doors open directly onto a private walk-out deck, creating effortless indoor-outdoor living, while a separate private roof deck offers sweeping Boston skyline views. The lower level features three spacious bedrooms, two full bathrooms, and a versatile lounge framed by custom built-ins, creating a flexible space for a family room or home office. Additional highlights include two deeded parking spaces and a pet-friendly association.

43 days
348
13

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 3
Bathrooms: 3
Full bathrooms: 3

Primary bedroom

Features: Bathroom - Full, Walk-In Closet(s), Flooring - Hardwood, Double Vanity, Recessed Lighting
Level: Third

Bedroom 2

Features: Closet, Flooring - Hardwood, Window(s) - Bay/Bow/Box, Recessed Lighting, Lighting - Overhead
Level: Third

Bedroom 3

Features: Closet, Flooring - Hardwood, Recessed Lighting, Lighting - Overhead
Level: Third

Primary bathroom

Features: Yes

Bathroom 1

Features: Bathroom - Full, Bathroom - With Shower Stall, Flooring - Stone/Ceramic Tile, Countertops - Stone/Granite/Solid, Double Vanity, Lighting - Overhead
Level: Third

Bathroom 2

Features: Bathroom - Full, Bathroom - With Shower Stall, Flooring - Stone/Ceramic Tile, Recessed Lighting, Lighting - Overhead
Level: Third

Bathroom 3

Features: Bathroom - Full, Bathroom - With Shower Stall, Flooring - Stone/Ceramic Tile, Recessed Lighting, Lighting - Overhead
Level: Fourth Floor

Dining room

Features: Flooring - Hardwood, Recessed Lighting
Level: Main,Fourth Floor

Family room

Features: Closet/Cabinets - Custom Built, Flooring - Hardwood, Recessed Lighting
Level: Third

Kitchen

Features: Skylight, Flooring - Hardwood, Balcony / Deck, French Doors, Kitchen Island, Recessed Lighting, Wine Chiller, Gas Stove
Level: Main,Fourth Floor

Living room

Features: Bathroom - Full, Skylight, Flooring - Hardwood, Flooring - Stone/Ceramic Tile, Wet Bar, Cable Hookup, Exterior Access, Open Floorplan, Recessed Lighting
Level: Fourth Floor

Heating

Forced Air, Natural Gas, Unit Control

Cooling

Central Air, Individual, Unit Control

Appliances

Laundry: Main Level, Third Floor

Features

Has basement: No
Number of fireplaces: 1
Fireplace features: Dining Room, Living Room
Common walls with other units/homes: No One Above

Interior area

Total structure area: 3,077
Total interior livable area: 3,077 sqft
Finished area above ground: 3,077

Property

Parking

Total spaces: 2
Parking features: Deeded, Off Street, Tandem
Uncovered spaces: 2

Features

Patio & porch: Deck, Deck - Roof, Deck - Composite
Exterior features: Deck, Deck - Roof, Deck - Composite

Details

Parcel number: 4951854
Zoning: RES

Construction

Type & style

Home type: Townhouse
Property subtype: Condominium, Townhouse, Rowhouse

Materials

Brick
Roof: Rubber

Condition

Year built: 1885
Major remodel year: 2014

Utilities & green energy

Sewer: Public Sewer
Water: Public

Community & HOA

Community

Features: Public Transportation, Shopping, Walk/Jog Trails, Medical Facility, Highway Access, House of Worship, Private School, Public School, T-Station, University
Security: Intercom, TV Monitor

HOA

Amenities included: Elevator(s)
Services included: Water, Sewer, Insurance, Maintenance Grounds, Snow Removal, Trash, Reserve Funds
HOA fee: $2,004 monthly

Location

Region: Boston

Financial & listing details

Price per square foot: $1,495/sqft
Tax assessed value: $3,955,500
Annual tax amount: $49,511
Date on market: 7/29/2026

Estimated market value

$4,217,600

$3.84M - $4.64M

Not available

Price history

Date	Event	Price
8/24/2026	Pending sale	$4,599,000$1,495/sqft
Source: MLS PIN #73556567 Report a problem
7/29/2026	Listed for sale	$4,599,000+9.5%$1,495/sqft
Source: MLS PIN #73556567 Report a problem
3/18/2025	Sold	$4,200,000-6.6%$1,365/sqft
Source: MLS PIN #73299204 Report a problem
2/8/2025	Pending sale	$4,499,000$1,462/sqft
Source: William Raveis Real Estate, Mortgage & Insurance #73299204 Report a problem
2/8/2025	Contingent	$4,499,000$1,462/sqft
Source: MLS PIN #73299204 Report a problem
10/6/2024	Listed for sale	$4,499,000$1,462/sqft
Source: MLS PIN #73299204 Report a problem
10/20/2021	Listing removed	--
Source: William Raveis Real Estate, Mortgage & Insurance Report a problem
3/16/2021	Listed for rent	$15,000$5/sqft
Source: William Raveis Real Estate, Mortgage & Insurance #72798545 Report a problem