Spanning nearly 1,600 square feet, Residence 423 at The Ontario reflects a thoughtful blend of early 20th-century architecture and modern livability. Ten-foot ceilings, heart pine hardwood floors, and generously scaled rooms create a sense of openness, while a wall of oversized windows draws in natural light and frames elevated city views. An entry foyer sets the tone and connects to a spacious living room centered around a ventless gas log fireplace, with built-in shelving and a window seat adding both function and character. Pocket doors lead to a separate dining room designed for gathering, which opens to a wrought-iron balcony. Just beyond, a butler's pantry links to the kitchen, offering practical flow for both everyday living and entertaining. The corner primary bedroom is bright and well-proportioned, while the second bedroom provides flexibility for guests or a home office. The bath maintains its classic appeal with a clawfoot tub and pedestal sink. A walk-in closet off the foyer adds valuable storage, and the unit conveys with a private storage unit. Originally built in 1905 and featured in James Goode's Best Addresses, The Ontario is a landmark Beaux Arts cooperative known for its scale and architectural presence. Residents benefit from a full-service concierge with package reception, on-site professional management, landscaped grounds, a rooftop deck with panoramic views, resident lounge, bike storage, and a recently updated fitness center. Onsite parking is available for a modest monthly fee, and pets are welcome. The monthly fee includes real estate taxes, heat, hot water, water and sewer, trash, building services, maintenance, staffing, management, common area upkeep, and contributions to reserves. It also includes an underlying mortgage with an approximate remaining balance of $49,000 at 5.17% interest - the purchase price is reduced by the underlying mortgage balance. Ideally located near neighborhood dining destinations, Rock Creek Park, and Metro access, this residence presents a compelling opportunity to own within one of Washington's most iconic addresses. Square footage is estimated and based on 3rd party measurements.