The purpose of this research is to explore the energy balance within an offshore accommodation. The research is done In cooperation with Keppel Verolme BV. and the TU Delft for the department of Building Technology. The offshore accommodation is analysed in terms of structure and energy consumption, as is the typical environmental conditions in which offshore accommodations are operational. A model based on real-life study cases was compiled in the program of DesignBuilder and used to generate complicated simulations. These simulations gave insight into the energy-use aboard offshore accommodations and these insights were used to generate different concepts for reducing the need of fuel with means to generate electricity. The advantages and disadvantages of the concepts were analysed through simulations and were concluded in a final design. This information can be used by the offshore industry or to aid in sustainable future offshore accommodation designs.