Cities play a crucial role in achieving carbon neutrality by 2050 in line with the European Green Deal. In the EU, 75% of the population lives in cities, and globally, cities account for over 70% of the world’s carbon dioxide emissions. The City of Helsinki has set ambitious climate and emission reduction targets, aligned with EU and national objectives. Achieving these climate goals also requires a significant reduction in emissions in the field of construction. Circular economy in construction and the reuse of building components offer an effective way to reduce the use of virgin materials and control emissions. Although the reuse of building components is increasing, one of the main barriers to scaling it up is the timely identification of suitable demolition sites. Property owners often fail to report upcoming demolitions early enough and may not consider potential users for the salvaged materials. Circular economy companies must search for opportunities through their own networks, which is time-consuming. Furthermore, collaboration between circular economy companies—often small enterprises—and large property owners is not yet well-established, and its full potential remains unrecognized. Urban planning and zoning are not sufficiently utilized as drivers of the circular economy, nor do zoning currently have adequate tools for promoting circularity. Additionally, AI-driven design solutions hold significant untapped potential, but advancing them requires new forms of collaboration and innovation between companies. Effective circular economy design solutions still require research and development to establish the best models and more efficient processes. The development of structural solutions for reusable building components and standardized building models, such as modular parking structures, is essential for increasing reuse in construction. The City of Helsinki and Aalto University are addressing these challenges by advancing circularity in construction through this project. The main objective of the project is to make buildings awaiting demolition available for piloting. These buildings, owned by large private property owners, serve as a platform for circular economy companies to test new innovations. The first platform for these circular economy pilots will be Posti’s old sorting center in the Keskinen Postipuisto area of Helsinki. This facility will serve as a testing ground across all project work packages, supporting innovation challenges and piloting. The project will generate innovations in areas such as the reuse of building components, AI-assisted circular economy design, and the role of building material manufacturers in enabling reuse. The City of Helsinki is the coordinator, with Aalto University as a project partner. The project is divided into five work packages and 21 actions: WP1: Private properties as platforms for piloting (City of Helsinki) WP2: AI-based models for circular economy design (City of Helsinki) WP3: Circular economy design and analysis methods (Aalto University) WP4: Standardized parking facility made from reused building components (City of Helsinki) WP5: Building material manufacturers as an enabler of reuse (City of Helsinki) Project start on 1st of January 2026 and end on 31st of December 2027.