BIA’s Core Tradeoffs
Productivity comes at a cost: higher energy demands driven by artificial lighting and climate control, and higher embodied carbon from infrastructure.
“BIA doesn’t have a best answer. It has tradeoffs.”
The appeal of Building-Integrated Agriculture is that it seems to solve multiple problems at once: Local food production, reduced emissions, biodiversity, community resilience. The research complicates that picture
Across the 48 case studies examined in this report, no single BIA system type consistently outperforms the others. Every configuration involves tradeoffs, and recognizing them early is what separates well-designed BIA from well-intentioned BIA.
The Tension
The most consistent tension is between yield and energy. Vertical farms maximize food production within minimal floor area, a meaningful advantage in dense urban contexts where space is the constraint. But that productivity comes at a cost: higher energy demands driven by artificial lighting and climate control, and higher embodied carbon from infrastructure. Soil-based systems sit at the opposite end. Less productive per square meter, but lower-tech, lower-energy, and better suited to passive strategies like rainwater collection. Greenhouse systems occupy the middle, more context-dependent, with performance shaped heavily by local climate and access to natural light.
A second tradeoff runs between efficiency and social value. Highly productive vertical farms may reduce food miles and maximize yield, but can do so in ways that minimize community engagement, educational access, or cultural responsiveness. A lower-yield system embedded in a neighborhood and operated by local residents may deliver more of what the project was actually for.
How to Address It
The design implication is that BIA project goals need to be named explicitly before system selection begins. Prioritizing yield leads to different decisions than prioritizing energy performance, community engagement, or resource recovery. These priorities don't always align, and assuming they do is where projects run into trouble.
Hybrid systems offer one way through. Combining greenhouse and vertical farming technologies within a single building, or co-locating waste recovery systems alongside food production, allows different goals to be optimized at different scales. But hybrids add complexity, and complexity requires early coordination between operators, designers, and engineers before the system type is locked in.
In the report:
Part VII, "Conclusions”