This study aims to identify and analyze the causes of the wide spread of undeveloped lands in Riyadh, evaluate current obstacles to reduce their size, analyze current government policies, critically evaluate current proposals, and suggesting recommendations to adjust regulations concerning undeveloped lands in Riyadh. The study opted to a mixed method approach through a questionnaire as a tool to collecting data. The sample was composed of 60 participants containing investors, brokers, real estate developers, religious scholars, law experts, government officials, and consumers. After analyzing the data, the results appeared as follows: Monopoly is on the top the obstructive factors, then comes the unwillingness of real estate investors to accelerate the development of their undeveloped lands, as well as the lack of basic rules concerning the donation of lands to citizens and the lack of procedures in monitoring the investment of undeveloped lands. The current government policies concerning undeveloped lands are not clearly defined or set in professional way. The researcher recommends an integrated plan consisting of chronologic stages of solving the whole case of undeveloped lands, starting with warning periods, giving priority to the most important and strategic pieces of land, and starting with the largest areas, as well as recommendation to fulfill further field studies about complicated cases of undeveloped lands in big cities of the Kingdom Saudi Arabia
Keywords: Saudi Arabia, Sharia, Taxes, Undeveloped land, Zakat