1123 Walnut St. by MQ Architecture – Mixed-Use Innovation in Boulder

1123 Walnut St. by MQ Architecture represents a bold vision in mixed-use architecture, integrating retail, office, and a pioneering cannabis lounge for recreational use. Situated within Boulder’s Downtown Historic District, this project carefully balances historic context with contemporary design strategies.

The project involved two distinct commissions: first, designing a two-story building on a narrow 48-foot by 150-foot lot; second, creating a new typology of hospitality architecture—a cannabis lounge that maintains privacy while delivering an immersive spatial experience.

Historic Context & Design Approach

Facing Boulder’s 1880s Landmark District, the design references characteristic elements such as brick party walls, prominent roof cornices, vertically proportioned 4’x8’ windows, recessed storefronts, bulkheads, and exposed cast iron columns. Post-WWII modifications introduced metal and precast panels, which inspired the integration of modern modular materials in the new facade design.

The upper floor employs white aluminum crate panels over a stucco finish, forming large operable windows that fold into the cornice. The ground floor features 12-foot-high glass panels, aluminum cladding, and circular steel columns, creating a light-filled, contemporary streetscape.

Functional Zoning & Spatial Strategy

The street level accommodates three distinct uses with symmetrical recessed entrances. The cannabis lounge is strategically located at the eastern end, the office space at the western end, and retail running in between.

The lounge, lacking exterior windows, receives natural light from a 16×16-foot skylight filtered through a gold aluminum crate, creating privacy while illuminating the deep floor plan. This skylight doubles as an open patio with a second-floor terrace, promoting spatial hierarchy and natural light distribution.

The office vestibule features a white perforated metal staircase with reclaimed wood treads, leading to an open-plan second floor that maximizes Iron Flats views. Service elements, including bathrooms and kitchenette, are efficiently integrated, supporting flexible office rental arrangements.

Materiality & Sustainability

1123 Walnut St. merges historic preservation with modern construction, incorporating aluminum, steel, glass, and reclaimed wood. The project emphasizes daylight optimization, visual connectivity, and adaptive reuse, aligning with Boulder’s sustainable urban development goals.

All Photographs are works of Imagen Subliminal