TRAIN4SUSTAIN focused on harmonizing sustainable energy skills across the European construction sector by developing a unified, standardized system to evaluate and compare professionals' qualifications. The initiative successfully established the Competence Quality Standard (CQS) - which was officially validated as a European pre-standard (CEN Workshop Agreement) - providing a clear framework to score the green skills of both blue- and white-collar workers. As a powerful tool for professionals seeking to upskill, the project launched the European Skills Registry and a digital Skills Passport, which function as active matchmaking platforms to help trained experts prove their competencies and connect with new sustainable building projects.

BUS-GoCircular aimed to overcome the challenges of implementing circular economy practices in the construction sector by developing a comprehensive, cross-craft qualification framework focused entirely on circular skills. The project successfully equipped hundreds of professionals and SMEs with essential green competencies through targeted mentoring and practical, hands-on training programs. The project offers open-access "Train-the-Trainer" materials, practical toolkits, and modular training units specifically designed to help workers integrate circularity into everyday building and renovation projects.

BUSLeague project tackled the demand for an energy-skilled workforce by developing a publicly available cross-craft qualification framework (comprising 98 tasks and 92 learning outcomes), that remains accessible today for shaping new training programs. During its execution, the project successfully upskilled over 5,600 individuals, including retail staff and installers, while securing concrete commitments to integrate energy skills into public procurement. The project provides open access to a vast compilation of tailored curricula, e-tools, and handbooks, which continue to be utilized by partnered training centers across Europe.

DoubleDecker focused on enhancing the energy performance of the building stock by tackling both the technical and digital skills gaps within the construction workforce. The initiative successfully developed integrated training approaches that combined energy efficiency principles with practical digital tools. As a valuable asset for professionals aiming to upskill today, the project provides accessible training frameworks and methodologies that bridge the divide between theoretical sustainability and practical, on-site execution.

REBOOT-SKILLS-LT addressed the crucial shortage of qualified construction workers in Lithuania by comprehensively redefining the national BUILD UP Skills roadmap. Through active stakeholder engagement, the project successfully identified the most pressing skills gaps related to energy efficiency and sustainable building practices. Today, local professionals and educational bodies can leverage the project’s detailed action plan to implement targeted, high-quality training schemes that meet actual market demands.

ReBUSk project worked to revitalize the national construction sector's capacity for energy-efficient renovations by updating the BUILD UP Skills roadmap for Austria. The initiative successfully fostered strong partnerships between educational institutions and industry leaders to map critical deficiencies in green skills. For professionals and educators today, the project’s legacy lies in its endorsed strategic action plan, offering a clear framework to launch modern, specialized training programs for the national workforce.