BMN Boston

Get our mobile app!

Download on the App Store

21 Oak St # 1, Boston MA 02129

Boston, MA 02129 • Charlestown
$1,297,500
Est. $8,191/month
2
Beds
1.5
Baths
1,581
Sq Ft
$821
Price/Sq Ft
0.11
Acres
1920
Year Built
15 hours 48 minutes
Time on Market
Active Open House Listed Mar 25, 2026 • MLS# 73491508 Copied!

About this home

Prime Location Meets Contemporary Luxury! This custom-designed duplex offers nearly 1,600 sq ft of sophisticated living across two levels in a welcoming Charlestown neighborhood. The bright open-concept layout features hardwood floors throughout, windows on three sides equipped with custom remote-control shades, and a striking double-sided gas fireplace connecting the foyer to the living area.A chef’s kitchen boasts stainless appliances, granite countertops, wood cabinetry, and a breakfast bar. The spacious primary suite features dual closets and a newly remodeled spa-style bath, complemented by a generous second bedroom and guest half-bath.Additional upgrades include a new furnace and tankless water heater. Enjoy the convenience of private deeded parking, central air, in-unit laundry, and extra storage. Live steps from Whole Foods and Charlestown’s best dining, including Monument Restaurant & Prima, and Warren Tavern. With easy access to parks and transit.

View in the App

Save this property, schedule tours instantly, and get alerts when the price drops

Scan to download BMN Boston app Scan with phone
Get the full experience in the BMN Boston app

Property Overview

Property Type
Condominium
Listing Type
For Sale
Year Built
1920
Bedrooms
2
Full Bathrooms
1
Half Bathrooms
1
Living Area
1,581 sq ft
Total Rooms
5
Stories
2
Entry Level
1

Open House Schedule

28
Mar
Saturday, March 28
11:30 AM - 1:00 PM EDT
29
Mar
Sunday, March 29
11:30 AM - 1:00 PM EDT

Facts & Features

Central AC

Home Facts

Type Residential
Style Condominium
Year Built 1920
Living Area 1,581 sq ft
Lot Size 0.11 acres
Bedrooms 2
Full Baths 1
Half Baths 1
Total Rooms 5

Interior

Heating Forced Air, Natural Gas
Cooling Central Air
Flooring Wood, Tile
Appliances Energy Star Qualified Refrigerator, Energy Star Qualified Dryer, Energy Star Qualified Dishwasher, Energy Star Qualified Washer, Range, Oven
Fireplace None
Fireplaces 1
Basement N
Laundry In Unit
Features None

Exterior

Construction Frame
Architecture None
Roof Shingle
Features Porch, Garden
Pool None
Spa None
Fencing None
Patio/Porch Porch

Parking

Features Off Street, Deeded, Driveway
Total Spaces 1

Utilities

Electric 110 Volts
Water Public
Sewer Public Sewer
Gas None
Other For Gas Range

Financial

Annual Tax $13,562
Assessed Value $1,171,200

Interior Features

Flooring: Wood, Tile
Appliances: ENERGY STAR Qualified Refrigerator, ENERGY STAR Qualified Dryer, ENERGY STAR Qualified Dishwasher, ENERGY STAR Qualified Washer, Range, Oven
Interior Features:
Windows: Insulated Windows
Basement: N
Laundry: In Unit
Security:

Construction & Materials

Year Built: 1920
Effective Year (Renovated): 2008
Structure Type: 2/3 Family
Exterior Materials: Frame
Roof: Shingle
Foundation:
Stories: 2

Heating, Cooling & Utilities

Heating: Forced Air, Natural Gas
Heating Zones: 1
Cooling: Central Air
Cooling Zones: 1
Hot Water:
Water Source: Public
Sewer: Public Sewer
Energy Features: Thermostat

Exterior & Lot

Exterior Features: Porch, Garden
Patio & Porch: Porch
Fencing:
Other Structures:
Lot Features:
Road Surface:

Parking & Garage

Total Parking Spaces: 1
Parking Features: Off Street, Deeded, Driveway

Special Features

Fireplaces: 1
Fireplace Type:
Community Amenities: Public Transportation, Shopping, Park, Walk/Jog Trails, Medical Facility, Bike Path, Highway Access, House of Worship, Marina, Private School, Public School, T-Station, University

Location

Loading map...

Neighborhood

Charlestown

21 Oak St # 1, Boston MA 02129

Boston, MA 02129

Walkability

Loading Walk Score...

Nearby Schools

School information not available for this location.

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 $1,130
Homeowners Insurance $200
HOA Fee $300/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

Interest
Principal
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.

Property History

Property Timeline

🏠
Listed for Sale
Mar 25, 2026
$1,297,500
Original listing
Agent: Lisa Sheehan Office: Berkshire Hathaway HomeServices Robert Paul Properties

Price & Status History

Date Event Price Change
Mar 25, 2026 New Listing Added $1,297,500

Market Statistics

Time on Market
15 hours 48 minutes
Price per Sq Ft
$821

Tax History

Year Taxes Assessment
2025 $13,562 $1,171,200

Financial Details

Annual Property Tax
$13,562
Tax Year 2025
HOA Fee
$300
Monthly
Assessed Value
$1,171,200

Listing Information

Listing Agent Lisa Sheehan
Listing Office Berkshire Hathaway HomeServices Robert Paul Properties
Agent MLS ID E9500664
Office MLS ID AN6521
Listing information is deemed reliable but not guaranteed. Data provided by MLS Property Information Network, Inc. All information should be independently verified.

Comparable Properties

Customize Comparable Search

Finding comparable properties...

Market Analytics for Boston, MA

Real-time market trends and pricing data for this area

21 Oak St # 1, Boston MA 02129 - Photo 1 21 Oak St # 1, Boston MA 02129 - Photo 2 21 Oak St # 1, Boston MA 02129 - Photo 3 21 Oak St # 1, Boston MA 02129 - Photo 4 21 Oak St # 1, Boston MA 02129 - Photo 5 21 Oak St # 1, Boston MA 02129 - Photo 6 21 Oak St # 1, Boston MA 02129 - Photo 7 21 Oak St # 1, Boston MA 02129 - Photo 8 21 Oak St # 1, Boston MA 02129 - Photo 9 21 Oak St # 1, Boston MA 02129 - Photo 10 21 Oak St # 1, Boston MA 02129 - Photo 11 21 Oak St # 1, Boston MA 02129 - Photo 12 21 Oak St # 1, Boston MA 02129 - Photo 13 21 Oak St # 1, Boston MA 02129 - Photo 14 21 Oak St # 1, Boston MA 02129 - Photo 15 21 Oak St # 1, Boston MA 02129 - Photo 16 21 Oak St # 1, Boston MA 02129 - Photo 17 21 Oak St # 1, Boston MA 02129 - Photo 18 21 Oak St # 1, Boston MA 02129 - Photo 19 21 Oak St # 1, Boston MA 02129 - Photo 20 21 Oak St # 1, Boston MA 02129 - Photo 21 21 Oak St # 1, Boston MA 02129 - Photo 22 21 Oak St # 1, Boston MA 02129 - Photo 23 21 Oak St # 1, Boston MA 02129 - Photo 24 21 Oak St # 1, Boston MA 02129 - Photo 25 21 Oak St # 1, Boston MA 02129 - Photo 26 21 Oak St # 1, Boston MA 02129 - Photo 27 21 Oak St # 1, Boston MA 02129 - Photo 28
BMN Boston Real Estate

BMN Boston Real Estate

Douglas Elliman

Schedule a Tour