Big Roof by 1+1+ Architects – Detroit’s Iconic Waterside Pergola

Located in the Jefferson Chalmers neighborhood of Detroit, Michigan, Big Roof is an innovative oversized garden pergola designed by 1+1+ Architects in collaboration with HD Structural. Completed in 2022, this 800 ft² structure extends the dining and event space of Coriander Kitchen & Farm, a celebrated farm-to-table restaurant, seamlessly connecting indoor comfort with the beauty of its canal-side surroundings.

Design Concept

Inspired by the rhythms of its environment, Big Roof is more than a pergola—it’s a multi-seasonal architectural experience. The structure’s corrugated planar roof mirrors the design language of nearby marinas, while its lightweight steel columns ensure minimal impact on the natural site. Nine custom triangular trusses, constructed from nominal lumber and Simpson Strong-Tie connections, support a clear polycarbonate roof that frames ever-changing skies, creating a dynamic and immersive experience for visitors.

Sustainability & Interaction with Nature

Big Roof goes beyond aesthetics by embracing ecological design. Its oversized canopy collects rainwater for an onsite rain garden, blending sustainability with functionality. During spring, the removable plastic façade opens the space to canal-side dining, inviting local wildlife—birds and bees—into the experience. In winter, the structure transforms into a luminous lantern, enhancing the sensory atmosphere for diners and passersby alike.

Spatial Experience

The pergola blurs boundaries between indoors and outdoors. Pilotis elevate the structure, while a continuous gravel ground extends beyond the building envelope, encouraging flexible activities and a strong connection with the surrounding environment. Big Roof exemplifies how architecture can be a literal extension of its site, creating a dialogue between human use and natural conditions.

 Big Roof is a striking example of how thoughtful architectural design can elevate everyday dining experiences while promoting environmental awareness. By combining innovative truss systems, sustainable rainwater management, and adaptable outdoor spaces, this pergola celebrates Detroit’s cultural and natural landscape.

All Photographs are works of Laura Marie Peterson, De Peter Yi