The European furniture industry is transitioning towards sustainability and circular practices, driven by the need for regulatory alignment and standardisation. The EU-funded Cir4Fun project will enhance furniture sustainability by introducing digital product passports (DPP) and promoting eco-labelling. It will create a circular economy roadmap, develop eco-design guidelines and establish innovative business models. The project will also devise new methodologies for assessing maintenance, reparability, refurbishment, remanufacturing and recyclability. These insights will be integrated into an interoperable furniture assessment system (FAS), featuring a sustainable index system, developed with the support of life cycle assessment, life cycle costing and social life cycle assessment under a Furniture Data Space. Cir4Fun will actively engage stakeholders to foster sustainable behaviours, advancing the industry’s shift to circularity.