A review evaluates urban biowaste and excavated soil as secondary resources for construction. It identifies technical and regulatory barriers to urban mining. The discussion centres on Urban mining, Excavated soil, Biowaste, and Construction materials.

The analysis draws on Systematic literature review, material classification, and barrier and opportunity analysis. The geographical or conceptual scope is International construction-sector literature.

The contribution reflects the Lab’s interdisciplinary approach, combining quantitative and qualitative evidence to translate urban-metabolism research into planning, design, governance or policy. Written by Giulia Scialpi and Daniela Perrotti, it appears in or was issued by Waste Management & Research (40, 262–273).