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River Park Mutual Homes (RPMH) is a striking midcentury modern cooperative community at 1301 Delaware Avenue SW in Washington, DC. Spanning eleven acres in the heart of Southwest, the property includes two elegant eight-story towers completed in 1962 with 380 co-op residences, as well as 138 three- and four-story townhomes that create a village-like setting within the city.

Designed by Charles M. Goodman and developed by the Reynolds Metals Company, RPMH is a masterclass in midcentury modern design. Its distinctive metal grille façades and dramatic barrel-vaulted roofs give the complex a bold and unmistakable presence in Washington.

Built during the sweeping urban renewal that reshaped Southwest, RPMH became one of the first racially integrated residential developments in the District. On this tour, we will explore how Goodman balanced density with openness and modern materials with human scale, revealing a community that reflects both architectural innovation and an important chapter in the city’s social history.

Learning Objectives:

• Analyze the pre-1960s built environment of Southwest Washington, DC, and assess the effects of urban renewal on community planning and neighborhood form.
• Identify defining elements of midcentury modern design, including massing, materials, and site planning, and evaluate their impact on livability and human scale.
• Examine the work of Charles M. Goodman, focusing on his integration of density, open space, and modern materials to support resident well-being.
• Evaluate the cooperative housing model, considering its planning, ownership structure, and long-term implications for community stability and welfare.

Presented by:

Michael D. Zajac, PE, LEED AP
Senior Project Manager
SGH

Emily Bacher, AIA
Senior Architect
Quinn Evans