New York City Local Law 31 of 2016 set stringent source energy use intensity (EUI) targets for the design of new municipal capital buildings, additions, and substantial reconstructions. Local Law 97 of 2019, part of the City’s Climate Mobilization Act, set aggressive new greenhouse gas (GHG) reduction targets for the entire municipal portfolio that will require retrofits of most City-owned buildings. The City’s unprecedented targets for municipal buildings raise challenges relevant to any owner of a large portfolio. How can the City's wide variety of building typologies – schools, libraries, vehicle maintenance garages, police stations and fire houses, hospitals, cultural institutions, and others – cut energy use 50% or more from today’s levels? Which applications within the portfolio are best for electric heat pumps, and how do applications in new construction and major renovations differ from those in buildings limited to incremental upgrades? This session will provide an overview of these laws, their projected impact on the City’s 4,600 buildings, the ways in which electric heat pumps can help meet these targets, and how the answers to these questions are being incorporated into programs and designs currently underway.