This paper assesses the effectiveness of technical policy instruments used to manage urban growth and examines their relationship with institutional practices in the city of Riyadh, Saudi Arabia. A quantitative method by means of a questionnaire was adopted to examine research questions, while a qualitative method was used to better understand technical policy instruments and their relationship with institutional practices. Findings reveal that technical policy instruments are unable to manage urban growth effectively. A number of factors, such as lack of community participation, low coordination levels, and a failure to disseminate clear information have contributed to this lack of effectiveness. Therefore, the creation of a national framework to link institutional practice to technical policy instruments is required in order to improve the overall capacity of urban authorities to manage urban growth.