Dupont Circle street scene showing a renovated multi-story office-to-residential building on the left, historical red-brick building on the right.

1201 Connecticut Ave. NW

Dupont Circle, Washington, DC

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 160 unit residential property, with a rooftop pool deck, resident amenities, and 12,000 square feet of ground-floor retail. MWA took their renovation design successfully through the DC HPRB Review Process. Construction started Spring 2025.

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

General Contractor: McCullough Construction

The Longfellow Building, designed by William Lescaze in 1940, is recognized as the District’s first International Style modernist building.

Renovated in the 1980s, the original brick spandrels and west facing balconies were over-clad with pink granite.

Currently under construction and expected to deliver later this year, MWA aims to restore this historic building to Lescaze’s original design.

A city street view with modern and historic buildings, trees lining the streets, and a church with a large domed roof.
Aerial view of a city with multiple buildings, streets, crosswalks, and trees under a partly cloudy sky.
A city park with a large statue of a seated man on a pedestal, surrounded by trees and city buildings, with people sitting on benches and walking nearby.
Cityscape view of a modern apartment building with a rooftop terrace and multiple balcony levels, with people sitting and socializing, and other tall buildings in the background during the daytime.
Rooftop pool area with lounge chairs, umbrellas, and people relaxing, overlooking city buildings and a clear blue sky with some clouds.
City street scene with a modern multi-story office building on the left and an historic red brick building with a tower on the right. Cars and pedestrians are visible on the street and crosswalks, with greenery and street signs in the foreground.

Construction

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