FACILITA has released a report examining how One‑Stop‑Shop (OSS) structures operate across Europe and how they support the energy renovation of public buildings. The document contributes to ongoing work in Extremadura, Madrid, and Valencia, where regional OSS frameworks are being developed to help local and regional authorities improve the energy performance of their building stock.

Across the report, OSS models are described as having evolved from basic advisory desks to integrated structures capable of coordinating technical, legal, and financial tasks. This development reflects the growing need to address the energy inefficiency of public buildings, a challenge linked to national and European climate objectives. Renovation of this segment of the building stock is presented as a means to reduce energy consumption, improve comfort, and strengthen long‑term energy planning.

The comparative exercise covers a total of 21 OSS‑related initiatives. During the research phase, 18 organisations were contacted, and 9 provided additional information through a questionnaire. Using these inputs, the initiatives were mapped against 9 service categories and a 6‑step customer journey. The resulting overview shows that most initiatives are publicly led, with a smaller group operating under mixed governance structures and only 2 functioning as all‑inclusive or ESCO‑type models that assume full implementation and performance responsibility.

A large share of the initiatives concentrate on advisory and coordination functions. 12 combine both areas of work, 5 focus exclusively on advisory services, and 3 specialise in coordination. These functions are particularly relevant in the public sector, where procurement rules, compliance requirements, and the need to aggregate projects introduce additional complexity into the management of energy‑efficiency measures in buildings.

Spanish pilot regions

The findings have been applied to the three Spanish pilot regions. Extremadura is advancing a fully public OSS supported by the regional administration. Madrid is testing a private‑driven operational model with defined contractual requirements, while Valencia is developing a mixed structure with a public mandate. Each region adapts the OSS components to its institutional context and to the characteristics of its public building stock.

Overall, the report provides a clear overview of how OSS models are organised in Europe and which elements can support the energy‑efficient renovation of public buildings. The distribution of governance models, the emphasis on advisory and coordination services, and the comparative evidence gathered guide the development of regional OSS structures in Spain.