Daylight is essential in the architectural field, since the preliminary design stages onward, and along all the life cycle of a building. It influences the psychological and physiological aspects in human beings, as well as the energy efficiency of a building, as it can contribute to decreasing the energy demand for electric lighting and cooling. As a consequence, daylight is often mentioned above the most important factors by people when it comes to buying or leasing an apartment, which means that daylight can play a role in the determination of prices in the real estate market. Within this frame, the aim of this thesis is to investigate and to try to quantify the impact of daylight in the real estate.