1201 Connecticut Ave NW

Dupont Circle, Washington D.C.

1201 Connecticut Ave NW

Dupont Circle, Washington D.C.
Office-to-residential conversion in Dupont Circle of a 1941 William Lescaze building into a multifamily development with 161 apartments, retail, and rooftop amenities.

This residential conversion of the historic Longfellow Building in Dupont Circle transforms a 1941 modernist structure originally designed by Swiss-born American architect William Lescaze. The project reinterprets the International Style through a contemporary lens, honoring Lescaze’s legacy while introducing new vitality to a landmark DC neighborhood.

The adaptive reuse development features the conversion of a 190,385-square-foot, Class B office into a 161 unit residential property, with a rooftop pool deck, resident amenities, and 12,000 square feet of ground-floor retail. Construction begins in Summer 2025.

Project Website

Developer: Duball, LLC

Architect: Maurice Walters Architect, Inc.

Interior Designer: Akseizer Design Group

Structural: SK&A

Landscape Architect: Studio39

Civil Engineer: VIKA Capitol, LLC

MEP: Henry Adams, LLC