Creates the multi-unit residential decarbonization initiative program to provide funding for feasibility studies to convert large, multi-family residential units to non-emitting renewable geothermal energy.

STATE AFFAIRS AND GOVERNMENT -- DECARBONIZATION DEMONSTRATION INITIATIVE ACT OF 2026 - Creates the multi-unit residential decarbonization initiative program to provide funding for feasibility studies to convert large, multi-family residential units to non-emitting renewable geothermal energy.