YIMBY (a protest acronym for Yes In My Backyard) usually represents a building or zone of which have a positive effect within a city and is considered desirable for residential zones, and to a lesser extent, commercial zones.

SimCity 4

In SimCity 4 YIMBY buildings tend to be reward buildings, civic services that have a positive effect within a city, or landmarks. Examples include the city hall, mayor's mansion, cemetery and the private school.

SimCity (2013)

SimCity (2013)'s YIMBY buildings tend to be civic services and landmarks, such as the city hall. These buildings cause a happiness wave within the area surrounding it and cause Sims to have the "We love the new city buildings!" thought.

Likewise, industrial buildings also have its own YIMBY buildings, usually city specializations, which tends to be NIMBY buildings for other zones, such as the coal mine.