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.
Under contract
Price cut: $50K (6/2)
$1,599,900
1701 18th St NW APT 401, Washington, DC 20009
3beds
1,641sqft
Condominium
Built in 1906
-- sqft lot
$1,562,500 Zestimate®
$975/sqft
$1,061/mo HOA
What's special
- 104 days |
- 240 |
- 2 |
Zillow last checked:
Listing updated:
Listed by:
Christopher Sanders 703-447-0440,
Century 21 Redwood Realty
Source: Bright MLS,MLS#: DCDC2250474
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 3
- Bathrooms: 3
- Full bathrooms: 3
- Main level bathrooms: 2
- Main level bedrooms: 2
Rooms
- Room types: Living Room, Dining Room, Primary Bedroom, Bedroom 2, Kitchen, Bedroom 1, Bathroom 1, Bathroom 2, Primary Bathroom
Primary bedroom
- Features: Flooring - HardWood
- Level: Main
- Area: 169 Square Feet
- Dimensions: 13 X 13
Bedroom 1
- Features: Flooring - HardWood
- Level: Main
- Area: 99 Square Feet
- Dimensions: 11 X 9
Bedroom 2
- Features: Flooring - HardWood
- Level: Upper
- Area: 250 Square Feet
- Dimensions: 25 X 10
Primary bathroom
- Features: Flooring - Tile/Brick
- Level: Main
- Area: 60 Square Feet
- Dimensions: 12 X 5
Bathroom 1
- Features: Flooring - Tile/Brick
- Level: Main
- Area: 45 Square Feet
- Dimensions: 9 X 5
Bathroom 2
- Features: Flooring - Tile/Brick
- Level: Upper
- Area: 32 Square Feet
- Dimensions: 4 X 8
Dining room
- Features: Flooring - HardWood
- Level: Main
- Area: 299 Square Feet
- Dimensions: 23 X 13
Kitchen
- Features: Flooring - HardWood
- Level: Main
- Area: 152 Square Feet
- Dimensions: 19 X 8
Living room
- Features: Flooring - HardWood, Fireplace - Wood Burning
- Level: Main
- Area: 360 Square Feet
- Dimensions: 18 X 20
Heating
- Forced Air, Natural Gas
Cooling
- Central Air, Ceiling Fan(s), Electric
Appliances
- Included: Microwave, Dishwasher, Disposal, Dryer, Range Hood, Refrigerator, Stainless Steel Appliance(s), Washer, Water Heater, Gas Water Heater
- Laundry: Main Level, Washer In Unit, Dryer In Unit, In Unit
Features
- Bar, Built-in Features, Ceiling Fan(s), Entry Level Bedroom, Formal/Separate Dining Room, Kitchen - Gourmet, Primary Bath(s), Spiral Staircase, Walk-In Closet(s), Dry Wall
- Flooring: Hardwood, Wood
- Windows: Energy Efficient, Double Pane Windows, Skylight(s), Window Treatments
- Has basement: No
- Number of fireplaces: 1
- Fireplace features: Mantel(s)
Interior area
- Total structure area: 1,641
- Total interior livable area: 1,641 sqft
- Finished area above ground: 1,641
- Finished area below ground: 0
Video & virtual tour
Property
Parking
- Total spaces: 1
- Parking features: Storage, Basement, Garage Faces Side, Attached
- Attached garage spaces: 1
Accessibility
- Accessibility features: Accessible Doors
Features
- Levels: Two
- Stories: 2
- Pool features: None
- Has view: Yes
- View description: City
Lot
- Features: Urban Land-Sassafras-Chillum
Details
- Additional structures: Above Grade, Below Grade
- Parcel number: 0153//2076
- Zoning: RES
- Special conditions: Standard
Construction
Type & style
- Home type: Condo
- Architectural style: Federal
- Property subtype: Condominium
- Attached to another structure: Yes
Materials
- Brick
- Roof: Flat
Condition
- New construction: No
- Year built: 1906
Utilities & green energy
- Sewer: Public Sewer
- Water: Public
Community & HOA
Community
- Security: Main Entrance Lock
- Condo and coop fee: $1,061 monthly
- Subdivision: Dupont
HOA
- Has HOA: No
- Amenities included: Common Grounds, Elevator(s)
- Services included: Common Area Maintenance, Maintenance Structure, Insurance, Maintenance Grounds, Management, Reserve Funds, Sewer, Trash, Water
- HOA name: The Duncan
Location
- Region: Washington
Financial & listing details
- Price per square foot: $975/sqft
- Tax assessed value: $1,459,970
- Annual tax amount: $11,525
- Date on market: 3/19/2026
- Listing agreement: Exclusive Right To Sell
- Listing terms: Conventional,Cash
- Ownership: Condominium
Estimated market value
$1,562,500
$1.48M - $1.64M
$6,335/mo
Price history
| Date | Event | Price |
|---|---|---|
| 6/6/2026 | Contingent | $1,599,900$975/sqft |
Source:  Bright MLS #DCDC2250474 Report a problem | ||
| 6/2/2026 | Price change | $1,599,900-3%$975/sqft |
Source: Bright MLS #DCDC2250474 Report a problem | ||
| 4/29/2026 | Price change | $1,649,900-2.9%$1,005/sqft |
Source: Bright MLS #DCDC2250474 Report a problem | ||
| 3/20/2026 | Listed for sale | $1,699,900$1,036/sqft |
Source: Bright MLS #DCDC2250474 Report a problem | ||
| 12/19/2025 | Listing removed | $1,699,900$1,036/sqft |
Source: Bright MLS #DCDC2222528 Report a problem | ||
| 11/7/2025 | Listed for sale | $1,699,900+7.9%$1,036/sqft |
Source: Bright MLS #DCDC2222528 Report a problem | ||
| 3/20/2018 | Sold | $1,575,000$960/sqft |
Source: Public Record Report a problem | ||
| 2/7/2018 | Listed for sale | $1,575,000-9.9%$960/sqft |
Source: Washington Fine Properties ,Llc #1000122390 Report a problem | ||
| 11/1/2017 | Listing removed | $1,749,000$1,066/sqft |
Source: Compass #DC10062308 Report a problem | ||
| 10/18/2017 | Price change | $1,749,000-2.6%$1,066/sqft |
Source: Compass #DC10062308 Report a problem | ||
| 9/26/2017 | Listed for sale | $1,795,000+41.3%$1,094/sqft |
Source: Compass #DC10062308 Report a problem | ||
| 3/4/2009 | Sold | $1,270,000-2.2%$774/sqft |
Source: Public Record Report a problem | ||
| 1/24/2009 | Listed for sale | $1,299,000+18.1%$792/sqft |
Source: Weichert Realtors** #DC6965978 Report a problem | ||
| 9/7/2007 | Sold | $1,100,000$670/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $11,525 -4.9% | $1,461,430 -4.3% |
| 2024 | $12,117 -0.2% | $1,527,750 |
| 2023 | $12,147 -0.4% | $1,527,750 |
| 2022 | $12,200 +8.1% | $1,527,750 +7.7% |
| 2021 | $11,290 +8% | $1,418,940 +0.1% |
| 2020 | $10,457 +6.4% | $1,417,500 +22.5% |
| 2018 | $9,832 +1.8% | $1,156,760 +1.8% |
| 2017 | $9,658 +0.3% | $1,136,290 +0.3% |
| 2016 | $9,631 +3.1% | $1,133,110 +3.1% |
| 2015 | $9,341 -2.6% | $1,098,950 -2.6% |
| 2014 | $9,593 +2.1% | $1,128,560 -3.9% |
| 2013 | $9,395 -0.1% | $1,174,420 |
| 2012 | $9,409 | $1,174,420 |
| 2011 | $9,409 +0.7% | $1,174,420 +0.7% |
| 2010 | $9,339 | $1,166,230 +5.4% |
| 2009 | -- | $1,106,560 -10.1% |
| 2007 | $10,831 | $1,230,750 |
Find assessor info on the county website
Monthly payment
Est. payment$--/mo
Payment breakdown
Explore the cost of this home by adjusting the details. Changes won't be saved.All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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Climate risks
Neighborhood: Dupont Circle
Nearby schools
GreatSchools rating
- 9/10Ross Elementary SchoolGrades: PK-5Distance: 0.1 mi
- 3/10Cardozo Education CampusGrades: 6-12Distance: 0.9 mi
Schools provided by the listing agent
- Elementary: Ross
- High: Cardozo Education Campus
- District: District Of Columbia Public Schools
Source: Bright MLS. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
A local agent can set up tours, give advice and negotiate with sellers.
- Washington, DC
- District of Columbia
- Washington
- 20009
- Dupont Circle
- 1701 18th St NW Apartment 401
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