Successful mixed use buildings respond to their context. When planning the building's layout and uses it is important to consider the needs of the occupants as well as the best outcome for the street and it's surrounds.
The most common form of mixed use development comprises of non-residential uses on the ground floor and residential uses above - this is referred to as vertical mixed use. Locating residential uses above street level provides dwellings with separation from street noise, greater privacy and better access to views and sunlight.
Some sites, particularly larger ones or developments that face onto quiet streets or open space, may separate uses into different buildings - this is referred to as horizontal mixed use. To be successful, the residential units should generally face onto quieter spaces or streets. They should be carefully designed to ensure they overlook and address any public areas without compromising their privacy.
The right answer may be a mix of building types. A context analysis is an important step in determining what the appropriate building type is for the site.