T The needs of the office buildings in Jakarta has increased because of factors of economic growth and the number of companies that don't have their own area to carry out its activities. At the rental office buildings, is related to the efficiency of the space and the cost of it’s production. Establishment of an efficient space, low cost lease area, became an attraction for investors to infuse capital in the rental office building. Efficiency is one of the criteria that must be accomplished to the rental office building, because it is related to the amount of space leased in and use of materials and treatments that should be as cheap as possible so that buildings reach advantage. The application of eco-tech architecture on the rental office building will have a different impact from the side of the building as well as the user convenience of the surrounding environment, because the architecture of the eco-tech has some aspects that can be applied to the rental office building rents offices to be efficient.