The starting point for this paper is a number of barriers that hinder profitable energy efficiency investments being conducted i.e. ìthe energy paradoxî). Examples are asymmetric information, split incentives, and transaction cost. One way to reduce these barriers are ìgreenî lease and the idea behind this is presented in the paper as well as examples from different countries. The paper then presents a case study about the introduction of green leases in a large office property in Sweden in order to reduce split incentives in a complex organisation structure. The situation concerns an international investor, a property manager and tenant, which is a common situation but seldom discussed in the literature. The process used and the resulting contract developed in this project could be used to solve similar situations in other regions/countries.