Casala is the first new component of the Sunnydale Hope SF Master Plan. Casala is a 55-unit development for low and very low-income families with studios, one-, two- and three-bedroom apartments. The common area amenities include a community room, podium-level courtyard, management office, laundry rooms, on-site parking and bicycle storage for 55 bicycles.

The ​​​Sunnydale Hope SF Master Plan calls for 775 units of replacement housing plus an additional 995 units of tax-credit affordable and market rate apartments located on the 50-acre site of San Francisco's largest public housing project, currently home to more than 1,700 ethnically diverse residents. Additional plans call for a new community center, new parks, a community garden, farmers market and neighborhood serving retail. To develop the Master Plan, Mercy Housing California and Related California conducted a comprehensive community planning process that included residents and community stakeholders to develop a master plan for a new mixed-income development.