Residential zones can be specialized into "Self-Sufficient Buildings". This was added via the "Green Cities" DLC, and is not available without it. To specialize an area, draw a district over the area to be affected and apply the desired specialization.
No specialization is the default, and results in standard generic residential buildings. Existing specializations can be removed with the "No Residential Specialization" button in the specialization menu. This will result in existing buildings disappearing, and then regrowing as generic residential buildings if there is sufficient demand.
|Available only with the Green Cities DLC enabled.|
The "Self-Sufficient Buildings" residential specialization creates buildings that recycle their waste and produce energy with solar panels and by other means. Beneficially they consume 30% less energy and produce 30% less garbage as compared to the standard residential buildings. Due to their lower dependence on city services, they generate 30% less tax income.
The "Self-Sufficient Buildings" specialization becomes available at the "Worthy Village" milestone.