Dimensions16 x 16.416666666
FeaturesBathroom - Full, Closet, Flooring - Hardwood, Recessed Lighting
LevelThird
423 Beacon St # 2, Boston MA 02115
Boston, MA 02115 • Back Bay
$4,500,000
Est. $27,737/month
Estimate assumptions
20% down, a 30-year loan at 6.5%, and $200/month estimated insurance.
Includes the supplied property-tax and HOA inputs; missing inputs contribute $0. HOA fees with an unspecified frequency are treated as monthly. PMI and closing costs are excluded.
Adjust the payment calculatorTrack this home for price, status, and open-house alerts.
About this home
A Back Bay penthouse that lives like a townhouse. A private entry and a single flight of stairs bring you to the main level, and the primary suite is just one flight above, so day-to-day living stays on two floors. The top floor and a private roof deck are there whenever you want them. One of only two residences in a classic brownstone, with deeded parking. The main level is made for entertaining. A 21-foot living room opens to oversized bay windows over the tree-lined street, anchored by a gas fireplace in a warm wood surround with built-in shelving alongside. The dining room flows back to the kitchen, with custom cabinetry, a Wolf range, a Sub-Zero refrigerator and a generous center island made for gathering. One flight up, the primary floor is a true retreat: a bedroom with its own bay window, a dressing hall lined with built-in closets, and a five-piece marble bath with a tub and a separate shower. A second bedroom at the rear works beautifully as a guest room or office. The top floor adds two more bedrooms and two full baths, including a front bedroom with its own fireplace and wet bar that doubles as a media room or guest suite. Just above, the private roof deck, more than 300 square feet, takes in the Back Bay skyline and becomes an outdoor living room from spring through fall. Fully renovated, with 11-foot ceilings on the main and primary floors and 10-foot ceilings above, walnut-stained white oak floors, radiant heated bath floors, integrated sound, refined millwork, central air and in-unit laundry. Pet friendly, with Newbury Street and the Esplanade minutes away.
View in the App
Save this property, schedule tours instantly, and get alerts when the price drops
Scan with phone
BMN Estimate
Get the number an algorithm can't give you
A free agent CMA factors in condition, upgrades, and the street — the things comps alone can't see.
Recently Sold Nearby
Price & Status History
Property Timeline
Listed for Sale
Nov 4, 2026
$4,500,000
Original listing
Agent: Hans Nagrath
Office: Compass
| Date | Event | Price | Change | $/sqft | Details |
|---|---|---|---|---|---|
| 11/04/2026 | 🏠 Listed for Sale | $4,500,000 | - | - | Original listing |
Tax History
| Year | Taxes | Assessment |
|---|---|---|
| 2026 | $45,975 | $3,707,700 |
Financial Details
Annual Property Tax
$45,975
Tax Year 2026
HOA Fee
$951
Monthly
Assessed Value
$3,707,700
Facts & Features
Central AC
Home Facts
Type
Residential
Style
Condominium
Year Built
1869
Living Area
2,539 sq ft
Lot Size
0.06 acres
Stories
3
Bedrooms
4
Full Baths
3
Half Baths
1
Total Rooms
7
Interior
Heating
Central
Cooling
Central Air
Flooring
Tile, Hardwood, Flooring - Stone/ceramic Tile
Appliances
Range, Dishwasher, Disposal, Microwave, Refrigerator, Washer, Dryer, Wine Refrigerator, Range Hood
Fireplace
Living Room
Fireplaces
2
Basement
N
Laundry
Electric Dryer Hookup, Washer Hookup, Third Floor, In Unit
Features
Bathroom - Full, Bathroom - Tiled With Tub & Shower, Lighting - Sconce, Bathroom, Wet Bar
Exterior
Construction
Brick
Architecture
None
Roof
Rubber
Features
Deck - Roof
Pool
None
Spa
None
Fencing
None
Patio/Porch
Deck - Roof
Parking
Features
Off Street, Deeded
Total Spaces
1
Utilities
Electric
None
Water
Public
Sewer
Public Sewer
Gas
None
Other
For Gas Range, For Electric Dryer, Washer Hookup
Financial
Annual Tax
$45,975
Assessed Value
$3,707,700
HOA & Community
HOA Fee
$951 Monthly
Fee Includes
Water, Sewer, Insurance, Maintenance Structure, Maintenance Grounds, Snow Removal, Reserve Funds
Amenities
None
Optional Fee Includes
None
Owner-Occupied Units
2
Pets
Yes
MA Disclosures
Lead Paint
Unknown
Seller Disclosures
Public Record Reflects 3 Bedrooms; Property Is Currently Configured And Marketed As A 4 Bedroom. Buyer And Buyer’s Agent To Perform Their Own Due Diligence.
Additional Details
Possession
None
Accepted Financing
Contract
Structure Type
["Brownstone"]
Unit/Building
2
Sq Ft Source
Public Record
Documents
Master Deed, Unit Deed (2)
County
Suffolk
Property Overview
Property Type
Condominium
Listing Type
For Sale
Year Built
1869
Bedrooms
4
Full Bathrooms
3
Half Bathrooms
1
Living Area
2,539 sq ft
Total Rooms
7
Stories
3
Entry Level
2
Floor Layout
Interactive room guide
Floor Layout
Finished Area
2,539 sq ft above grade
Dimensions16 x 17.666666666
FeaturesFireplace, Closet, Flooring - Hardwood, Window(s) - Bay/Bow/Box, Wet Bar, Recessed Lighting
LevelThird
Dimensions7.583333333 x 5.5
FeaturesBathroom - Full, Bathroom - Tiled With Shower Stall, Flooring - Stone/Ceramic Tile, Recessed Lighting, Lighting - Sconce, Pedestal Sink
LevelThird
Dimensions9.416666666 x 16.5
FeaturesCloset, Flooring - Hardwood, Recessed Lighting, Crown Molding
LevelSecond
Dimensions9.583333333 x 14.083333333
FeaturesBathroom - Full, Bathroom - Double Vanity/Sink, Bathroom - Tiled With Shower Stall, Flooring - Marble, Countertops - Stone/Granite/Solid, Recessed Lighting, Lighting - Pendant, Soaking Tub
LevelSecond
Dimensions16 x 19
FeaturesBathroom - Full, Closet, Closet/Cabinets - Custom Built, Flooring - Hardwood, Window(s) - Bay/Bow/Box, Recessed Lighting, Crown Molding
LevelSecond
Dimensions16.333333333 x 16.416666666
FeaturesFlooring - Hardwood, Countertops - Stone/Granite/Solid, Kitchen Island, Cabinets - Upgraded, Open Floorplan, Recessed Lighting, Stainless Steel Appliances, Wine Chiller, Gas Stove, Lighting - Pendant, Crown Molding
LevelFirst
Dimensions5 x 2.5
FeaturesBathroom - Half, Flooring - Stone/Ceramic Tile, Lighting - Sconce, Pedestal Sink, Pocket Door
LevelFirst
Dimensions9.5 x 11.333333333
FeaturesFlooring - Hardwood, Open Floorplan, Recessed Lighting, Lighting - Pendant, Crown Molding
LevelFirst
Dimensions16.25 x 21.083333333
FeaturesFlooring - Hardwood, Window(s) - Bay/Bow/Box, Open Floorplan, Recessed Lighting, Crown Molding
LevelFirst
FeaturesYes
Display Options
Outdoor Areas
Patio & porchDeck - Roof
Room Markers
KKitchen (1)
BRBedroom (4)
BABathroom (4)
DDining (1)
LLiving (1)
Conceptual diagram based on MLS room data. It is not to scale and is not a substitute for architectural plans or on-site measurements.
Interior Features
Flooring:
Tile, Hardwood, Flooring - Stone/Ceramic Tile
Appliances:
Range, Dishwasher, Disposal, Microwave, Refrigerator, Washer, Dryer, Wine Refrigerator, Range Hood
Interior Features:
Bathroom - Full, Bathroom - Tiled With Tub & Shower, Lighting - Sconce, Bathroom, Wet Bar
Windows:
Basement:
N
Laundry:
Electric Dryer Hookup, Washer Hookup, Third Floor, In Unit
Security:
Intercom
Construction & Materials
Year Built:
1869
Effective Year (Renovated):
2017
Structure Type:
Brownstone
Exterior Materials:
Brick
Roof:
Rubber
Foundation:
Stories:
3
Utilities & Systems
Heating:
Central
Heating Zones:
3
Cooling:
Central Air
Cooling Zones:
3
Hot Water:
Water Source:
Public
Sewer:
Public Sewer
Energy Features:
Exterior & Lot
Exterior Features:
Deck - Roof
Patio & Porch:
Deck - Roof
Fencing:
Other Structures:
Lot Features:
Road Surface:
Parking & Garage
Total Parking Spaces:
1
Parking Features:
Off Street, Deeded
Special Features
Fireplaces:
2
Fireplace Type:
Living Room
Community Amenities:
Public Transportation, Shopping, Park, Walk/Jog Trails, Medical Facility, Laundromat, Bike Path, Highway Access, House of Worship, Private School, Public School, T-Station, University
Nearby Schools
School District
Boston School District local
C-
Where Graduates Go
Class of 2021
52%
attend college
38%
4-Year
14%
2-Year
7%
Out of State
7%
Working
School Safety
2024-25
3.7%
Above Average
3.2%
Suspensions
0.3%
In-School
0.5%
Emergency
1.8% below state avg
Elementary Schools
10 schools
Kingsley Montessori School
0.2 mi
Grades PK-06
The Learning Project
0.5 mi
Grades K-06
Kids Are People School
0.6 mi
Grades PK-12
D
Melvin H. King South End Academy
0.8 mi
|
#24 of 25
|
Score: 20.4
Improved 363 spots from last year
-37.8 below state avg
80 students
Diverse
Rising School
Grades PK-12
Park Street School
0.8 mi
Grades K-07
Advent School
0.9 mi
Grades K-06
C
Hurley K-8 School
0.9 mi
|
#259 of 352
|
Score: 35.7
Dropped 24 spots from last year
-22.5 below state avg
337 students
Moderate
Grades PK-08
D
Perkins Elementary School
1.0 mi
|
#766 of 825
|
Score: 31.2
Improved 35 spots from last year
-27 below state avg
201 students
Diverse
Rising School
Diverse Student Body
Grades PK-06
F
Blackstone Elementary School
1.0 mi
|
#808 of 825
|
Score: 26.2
Improved 13 spots from last year
-32 below state avg
572 students
Moderate
Grades PK-06
The Winsor School
1.4 mi
Grades 05-12
Middle Schools
10 schools
F
Higginson/Lewis K-8 School
2.1 mi
|
#349 of 352
|
Score: 23.2
Improved 3 spots from last year
-35 below state avg
246 students
Diverse
Grades 03-08
Middle School Academy
2.2 mi
Nativity Prep School
2.2 mi
Grades 05-08
A
Uncommon Schools - Roxbury Preparatory Dorchester Campus Middle School
2.8 mi
|
#4 of 16
|
Score: 42.5
Improved 187 spots from last year
-15.7 below state avg
1,225 students
Diverse
Rising School
College Ready Curriculum
Grades 05-08
Mother Caroline Academy
3.0 mi
Grades 05-08
Dearborn Middle School
3.0 mi
Epiphany School
4.1 mi
Grades 05-08
C
Ohrenberger School
7.0 mi
|
#266 of 352
|
Score: 35.0
Improved 19 spots from last year
-23.2 below state avg
458 students
Diverse
Diverse Student Body
Grades 03-08
Timilty Middle
1.4 mi
UP Academy
2.2 mi
High Schools
10 schools
Newman School
0.2 mi
Grades 07-12
Cathedral High School
1.1 mi
9 sports
• 430 athletes
Grades 07-12
C
Quincy Upper School
1.2 mi
|
#279 of 346
|
Score: 44.4
Dropped 7 spots from last year
-13.8 below state avg
575 students
Very Diverse
12 sports
• 208 athletes
Diverse Student Body
Grades 06-12
A+
Boston Latin School
1.2 mi
|
#20 of 346
|
Score: 73.7
Improved 60 spots from last year
+15.5 above state avg
2,382 students
Very Diverse
18 sports
• 2,006 athletes
Strong AP Program
High Graduation Rate
Rising School
Strong Athletics
Grades 07-12
A-
O'Bryant School of Math & Science
1.4 mi
|
#90 of 346
|
Score: 61.6
Improved 94 spots from last year
+3.4 above state avg
1,518 students
Very Diverse
High Graduation Rate
Rising School
College Ready Curriculum
Diverse Student Body
Grades 07-12
B
Dearborn STEM Academy
1.7 mi
|
#13 of 25
|
Score: 33.4
Improved 356 spots from last year
-24.8 below state avg
565 students
Moderate
10 sports
• 242 athletes
Early College Program
Rising School
Grades 07-12
A+
Boston Latin Academy
2.4 mi
|
#2 of 25
|
Score: 64.9
Improved 214 spots from last year
+6.7 above state avg
1,669 students
Very Diverse
17 sports
• 1,298 athletes
Strong AP Program
High Graduation Rate
Rising School
Strong Athletics
Grades 07-12
D
Charlestown High School
2.4 mi
|
#319 of 346
|
Score: 32.9
Improved 52 spots from last year
-25.4 below state avg
646 students
Diverse
11 sports
• 488 athletes
Early College Program
Rising School
Grades 07-12
Meridian Academy
2.8 mi
Grades 06-09
F
Albert D Holland School of Technology
2.9 mi
|
#333 of 346
|
Score: 25.4
Improved 28 spots from last year
-32.8 below state avg
526 students
Diverse
Rising School
Grades 07-12
Learn about these ratings
Monthly Payment Calculator
Monthly Payment
$0
Principal, interest, taxes & insurance
Loan Amount
$0
After down payment
Total Interest
$0
Over life of loan
Total Cost
$0
Including down payment
%
Down: $0
%
Monthly Payment Breakdown
Principal & Interest
$0
Property Tax
$3,831
Homeowners Insurance
$200
HOA Fee
$951/mo
PMI (if <20% down)
$0
Loan Summary
Total of 360 payments
$0
Total principal paid
$0
Total interest paid
$0
Rate Impact
-0.5% Rate
$0/mo
Save $0/mo
Current Rate
$0/mo
+0.5% Rate
$0/mo
Cost $0/mo
Payment Over Time
Year 1
95% Interest
Year 15
50/50
Year 30
95% Principal
* Estimates only. Actual payments may vary. Consult with a lender for accurate figures.
Location
Loading map...
Neighborhood
Back Bay
423 Beacon St # 2, Boston MA 02115
Boston, MA 02115
Listing Information
Listing Agent
Hans Nagrath
Listing Office
Compass
Office Phone
617-206-3333
Agent MLS ID
CN225012
Office MLS ID
AN2383
Listing Data Updated
Nov 4, 2026 12:32 PM EST
Listing information is deemed reliable but not guaranteed. Data provided by MLS Property Information Network, Inc. All information should be independently verified.
Contact Us
Ask about this property — free, no obligation.
Similar Homes for Sale
Comparable Properties
Customize Comparable Search
Finding comparable properties...
Loading market insights for Boston.