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.
Sold for $1,100,000
Street View
$1,100,000
21 Oak St #1, Charlestown, MA 02129
2beds
1,581sqft
Condominium
Built in 1920
-- sqft lot
$1,201,300 Zestimate®
$696/sqft
$5,199 Estimated rent
Home value
$1,201,300
$1.11M - $1.32M
$5,199/mo
Zestimate® history
Owner options
List your home for rent
$5,199/mo
Rent Zestimate®
Find your next renter with Zillow Rental Manager. Plus, with online applications, you can quickly screen prospective tenants – for free.
$5,199/mo
Rent Zestimate®
Refinance and save
$6,799/mo
Est. payment
Refinancing to a lower rate could help reduce your monthly payments and save thousands over the life of the loan.
$6,799/mo
Est. payment
Explore your selling options
Work with a Zillow partner agent
Leverage their expertise and Zillow's premium Showcase listings to get your home seen by more buyers.
Get startedList with your own agent
Get your home in front of millions of buyers by listing it on Zillow.
Learn how to do itSell it yourself
Take full control of how buyers see your home on Zillow by listing For Sale by Owner (FSBO).
List your homeWhat's special
In-unit laundryGuest half-bathBright open-concept layoutBreakfast barGranite countertopsSpacious primary suiteHardwood floors throughout
Zillow last checked:
Listing updated:
Listed by:
Lisa Sheehan 978-821-4023,
Berkshire Hathaway HomeServices Robert Paul Properties 617-262-1414
Bought with:
The Charles King Group
Real Broker MA, LLC
Source: MLS PIN,MLS#: 73491508
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 2
- Bathrooms: 2
- Full bathrooms: 1
- 1/2 bathrooms: 1
Heating
- Forced Air, Natural Gas
Cooling
- Central Air
Appliances
- Included: ENERGY STAR Qualified Refrigerator, ENERGY STAR Qualified Dryer, ENERGY STAR Qualified Dishwasher, ENERGY STAR Qualified Washer, Range, Oven
- Laundry: In Unit
Features
- Flooring: Wood, Tile
- Windows: Insulated Windows
- Has basement: No
- Number of fireplaces: 1
Interior area
- Total structure area: 1,581
- Total interior livable area: 1,581 sqft
- Finished area above ground: 1,000
- Finished area below ground: 581
Property
Parking
- Total spaces: 1
- Parking features: Off Street, Deeded, Driveway
- Uncovered spaces: 1
Features
- Entry location: Unit Placement(Street,Partially Below Grade)
- Patio & porch: Porch
- Exterior features: Porch, Garden
Lot
- Size: 4,791 Square Feet
Details
- Parcel number: 1280750
- Zoning: CD
Construction
Type & style
- Home type: Condo
- Property subtype: Condominium
Materials
- Frame
- Roof: Shingle
Condition
- Year built: 1920
- Major remodel year: 2008
Utilities & green energy
- Electric: 110 Volts
- Sewer: Public Sewer
- Water: Public
- Utilities for property: for Gas Range
Green energy
- Energy efficient items: Thermostat
Community & HOA
Community
- Features: Public Transportation, Shopping, Park, Walk/Jog Trails, Medical Facility, Bike Path, Highway Access, House of Worship, Marina, Private School, Public School, T-Station, University
HOA
- Services included: Water, Sewer, Insurance, Maintenance Structure, Maintenance Grounds, Snow Removal
- HOA fee: $300 monthly
Location
- Region: Charlestown
Financial & listing details
- Price per square foot: $696/sqft
- Tax assessed value: $1,171,200
- Annual tax amount: $13,562
- Date on market: 4/10/2026
- Exclusions: Washer/Dryer, Light Fixture Over Dining Table
Price history
| Date | Event | Price |
|---|---|---|
| 6/12/2026 | Sold | $1,100,000-8.1%$696/sqft |
Source: MLS PIN #73491508 Report a problem | ||
| 5/31/2026 | Pending sale | $1,197,500$757/sqft |
Source: MLS PIN #73491508 Report a problem | ||
| 5/17/2026 | Contingent | $1,197,500$757/sqft |
Source: MLS PIN #73491508 Report a problem | ||
| 4/18/2026 | Price change | $1,197,500-7.7%$757/sqft |
Source: MLS PIN #73491508 Report a problem | ||
| 3/25/2026 | Listed for sale | $1,297,500+32.5%$821/sqft |
Source: MLS PIN #73491508 Report a problem | ||
| 4/29/2022 | Sold | $979,000$619/sqft |
Source: MLS PIN #72903143 Report a problem | ||
Public tax history
Tax history is unavailable.
Neighborhood: Charlestown
Nearby homes
- $1,087,4002 bd3 ba1.4k sqft19 Oak St #A, Charlestown, MA 02129Off Market
- $1,100,0002 bd2 ba1.4k sqft19 Oak St #19, Charlestown, MA 02129Sold
- $1,197,5002 bd2 ba1.4k sqft19-21 Oak St #19A, Boston, MA 02129Off Market
- $1,667,4003 bd2 ba1.9k sqft19 Oak St #21-3, Charlestown, MA 02129Off Market
- $1,304,2002 bd2 ba1.4k sqft19 Oak St #21-2, Charlestown, MA 02129Off Market
- $---- bd-- ba-- sqft21 Oak St #2, Charlestown, MA 02129Off Market
- $2,294,7003 bd2 ba1.9k sqft21 Oak St, Charlestown, MA 02129Off Market
- $1,907,4006 bd2 ba2.7k sqft23 Oak St, Charlestown, MA 02129Off Market
Nearby schools
GreatSchools rating
- NAHorace Mann School For The DeafGrades: PK-12Distance: 0.1 mi
- 8/10Warren-Prescott K-8 SchoolGrades: PK-8Distance: 0.3 mi
- 3/10Charlestown High SchoolGrades: 7-12Distance: 0.4 mi
Get a cash offer in 3 minutes
Find out how much your home could sell for in as little as 3 minutes with a no-obligation cash offer.
Estimated market value
$1,201,300
Get a cash offer in 3 minutes
Find out how much your home could sell for in as little as 3 minutes with a no-obligation cash offer.
Estimated market value
$1,201,300
- Massachusetts
- Suffolk County
- Boston
- 02129
- Charlestown
- 21 Oak St Unit 1
Nearby cities
Nearby neighborhoods
Nearby zip codes
Other Boston Topics
