The project concentrates on Barcelona’s distinct octagonal grid, marked by the cultural legacy of Louis Cerda that took root almost 200 years ago. Cerda’s revolution viewed health as the trigger for urban evolution, which created healthier living environments. Today, it is the resulting new stage of elderly life that must be addressed within the context of the city. While Barcelona’s grid is now saturated, the lack of space for new housing is creating a situation of sprawl where much needed residencies for elders are being pushed to the periphery. By creating an incentive driven policy, property owners can choose to give up a portion of their existing real estate to geriatric residencies, and in exchange, they will gain additional air rights to develop new housing additions above the existing height limitations. As a consequence, Elders appear in Barcelona streets as they are conveniently connected to the ground floor. Younger generations easily climb a few floors. Cerda’s block mixes incomes, accessibility and various level of dependency toward the health system.