Energy conservation measures on buildings have a significant role to play in reducing the burden of the energy bill on the Lebanese economy. The residential sector is one of various sectors that energy measures can be applied to. Such measures include the use of insulation materials, double-glazed windows, shading, efficient air-conditioning systems, economical lighting and reduction of infiltration rates. It is demonstrated through detailed energy analysis of typical residential and office buildings that strict conservation is beneficial on the micro-and, macro-economic levels. A code of practice is suggested to establish acceptable standards for energy use in residential buildings and ranking is done of energy measures based on economical indices.