Despite the legal efforts and the major increase in the implementation of quality management control systems in construction companies in Spain, serious deficiencies of different nature keep appearing, with the subsequent claims and complaints reported by the final user.This study analyses different factors in the planning of quality control in residential construction projects in Spain. After identifying and classifying the most common deficiencies, the study is focused on analyzing the first stage of the quality control planning. First, the content of models provided by the Professional Associations of Architects to their associates are studied. Afterwards, based on a representative sample of residential construction projects, its practical application is analyzed and discussed.