1701 18TH St NW 401, Washington, DC 20009
- Beds
- 3
- Baths
- 3
- Sqft
- 1,641
- Garage
- Yes
View property features, location on map, relevant school information and overview from seller's agent.
- 2
- 0
Overview
The Duncan Penthouse | Where Historic Charm Meets Modern Urban Living
Experience boutique living at its best in this rare two-level, three-bedroom, three-bath penthouse at The Duncan, an exclusive nine-residence condominium steeped in architectural history. Originally built in 1906 by Hornblower & Marshall and reimagined for contemporary living, The Duncan offers a perfect balance of timeless craftsmanship and modern sophistication.
Residence 401 impresses from the moment you enter — with 15-foot vaulted ceilings, dramatic natural light from three exposures and skylights, and warm maple flooring throughout. The spacious living area centers around a wood-burning fireplace, creating the perfect backdrop for elegant entertaining or quiet evenings at home.
The chef's kitchen showcases Sub-Zero and Wolf appliances, wrap-around cabinetry, and expansive prep space, seamlessly connecting to the living and dining areas. Two wet bars, each with a wine cooler — one on the main level and another off the private roof terrace — make entertaining effortless indoors or out.
The primary suite offers a serene escape with radiant-heated bathroom floors, generous closets, and abundant natural light. Two additional bedrooms and full baths provide flexible space for guests, work, or leisure.
Enjoy panoramic city views from your private roof deck — ideal for al fresco dining or sunset cocktails. Additional amenities include secure garage parking, private storage, in-unit laundry, elevator access, and pet-friendly living.
Perfectly positioned in the heart of Dupont Circle, The Duncan Penthouse puts you steps from the Red Line Metro, acclaimed restaurants, cafés, shops, and vibrant nightlife. With a Walk Score of 98, this penthouse combines rare privacy, refined scale, and one of DC's most coveted addresses.
Location
Full feature list
Basic info
- Property type
- Other residential
- Number of stories
- 2
- Number of bedrooms
- 3
- Number of bathrooms
- 3
- Square feet
- 1,641
- Year built
- 1906
Interior features
- Fireplaces
- 1
- Laundry
- In Unit
Exterior features
- Water view
- Yes
Garage and parking
- Garage parking spaces
- 1
Utilities
- Heating
- Natural Gas
- Cooling
- Central Air, Ceiling Fans
- Sewer
- Public Sewer
- Water
- Public Water
Taxes
- Tax Annual Amount (2025)
- $11,525
Public schools
Disclaimer: Certain information displayed on this listing has been derived from parties other than Final Offer, LLC. Information provided and their sources have been deemed reliable, but accuracy of information is not guaranteed and therefore should be independently verified.
Sourced from: Bright MLS MLS®#: DCDC2250474 Last checked: …

The data relating to real estate for sale on this website appears in part through the BRIGHT Internet Data Exchange program, a voluntary cooperative exchange of property listing data between licensed real estate brokerage firms in which Century 21 Redwood Realty Washington, DC participates, and is provided by BRIGHT through a licensing agreement. The information provided by this website is for the personal, non-commercial use of consumers and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Some properties which appear for sale on this website may no longer be available because they are under contract, have closed or are no longer being offered for sale. Information Deemed Reliable But Not Guaranteed. Copyright © 2026 Bright MLS. All rights reserved.