This book constitutes the refereed proceedings of the tracks and workshops which complemented the 18th European Conference on Software Architecture. ECSA 2024 Tracks and Workshops, ECSA 2024, held in Luxembourg City, Luxembourg, during September 3–6, 2024. The 6 full papers and 9 short papers presented here were carefully reviewed and selected from 26 submissions. They were organized in topical sections such as Tools & Demos and Doctoral Symposium tracks of the main conference. In addition, it contains the proceedings of the two workshops: 7th Context-Aware, Autonomous and Smart Architectures International Workshop (CASA7th Context-Aware, Autonomous and Smart Architectures International Workshop (CASA) The 3rd International Workshop on Quality in Software Architecture (QUALIFIER).