This document summarizes a pilot project conducted by Abu Dhabi Municipality to implement an energy efficiency program for existing buildings. The project involved a comprehensive energy audit of 71 buildings across various sectors to identify energy conservation measures. A phased approach was used starting with assessment, then implementation and monitoring. The project is expected to annually save 46,000 kWh of electricity, 32,000 tons of CO2 emissions and generate gross returns of 6.55 million AED over 10 years. This pilot aims to inform the development of city-wide energy efficiency programs and regulations.