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The concept stems from the ambition to enhance a site of strong symbolic value: the former power station of the Castelli Romani Tramway, decommissioned since 1960. Located on a 2,700 sqm plot along the Cammino delle Fraternità in the municipality of Castel Gandolfo, the building was identified as a space to be regenerated into a multifunctional hub. The initial concept was developed in 2022 through a collaboration between Cotral and the Faculty of Architecture at University of Rome “La Sapienza”. The final design maintains the original character of the building while elaborating and reinforcing the preliminary design decisions, assigning the new functions of event venue, guest accommodation, and ancillary services.
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The intervention is situated along the pedestrian and cycling path that connects to Albano Laziale, integrating into the Cammino delle Fraternità. The project establishes a new public space embedded in the natural landscape, fostering collective use and interaction with the environment. A system of terraces overlooks the surrounding hills of olive groves, enhancing the ridgeline that descends toward the Via Appia. The original openings of the building have been preserved to maintain both visual and functional continuity with the external environment.
The project is grounded in the adaptive reuse of the existing structure, minimizing land consumption and environmental impact. The external masonry is preserved and structurally reinforced through reinforced joint repointing. The entire design process was developed in BIM, ensuring high-level detailing and interdisciplinary coordination. MEP integration and clash management were addressed during the design phase. All quantity take-offs were extracted directly from the BIM model, and the cost estimation was carried out with input from all involved disciplines.
The project transforms the former power station into an event facility incorporating guest accommodations and service areas. The intervention comprises a four-storey volume—originally the caretaker’s residence—and a single-level 380 sqm industrial hall. A new intermediate steel floor slab, structurally independent and detached by 30 cm from the existing masonry, is introduced to create a double-height space and a distribution walkway. The roof will be reconstructed using a timber structure and zinc-titanium sheet cladding, preserving only the original trusses. A lift will connect all levels. Outdoor areas will be reorganised into terraces overlooking the hills, establishing a strong dialogue with the landscape. The entire project was modelled in BIM, including furniture and plant systems, with highly detailed phasing and LOD (Level of Development). Architectural and structural choices, such as the introduction of new arched openings, combine innovation with respect for the existing structure, resulting in a contemporary and functional environment.
Regenerating this building means restoring collective memory and returning a meaningful space to the community. The project is a tangible example of how sustainability and innovation can coexist within a historically and environmentally valuable context to create contemporary spaces that address cultural, social, and ecological needs.
3TI Progetti is the Italian largest independent fully employee-owned engineering company, ranked in the ENR TOP 225 international design firms since 2015, offering consulting services for the last 25 years in planning, design, project & construction management of transport (airports, railways, ports, metros, roads) and social infrastructures (complex buildings such as hospitals, schools, cultural buildings), with particular attention to sustainable aspects.
3TI Progetti has carried out over 3000 projects around the world and has positioned itself in the global market as a leading architecture and engineering consulting firm.Being among the first companies which took the path of designing in BIM, 3TI PROGETTI obtained in 2018 the BIM certification for architectural, structural design activities, for installations and infrastructures for civil works issued by ICMQ. With headquarters in Rome, we are a global player operating in more than 70 countries.
