BUILD UP

The European portal for energy efficiency and renewable energy in buildings

Case studies

Case studies offer insight into implemented technologies, methodologies, research, or practices, and provide an overview of real-life results, outcomes, lessons learned, and best practices.

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Case studies (205)
The image shows a modern building with spacious terraces and glass façades, surrounded by greenery that softens its urban character. In the background, taller residential towers rise above it, creating a contrast between architectural scales.
Zero-Carbon collective housing in Xi’an

Shuiyifang Housing integrates photovoltaic generation, full electrification, and passive strategies to achieve near‑zero energy consumption and reduce operational costs, establishing a residential model with very low energy demand.

Editorial team
The image shows a multi‑storey residential building with a refurbished light‑coloured façade and dark panels on one end. Surrounding it are other similar blocks and an open grassy area.
First apartment building in Tartu renovated

Integrated renovation completed in Tartu, Estonia, under the EU-funded oPEN  Lab project, improving energy efficiency in a municipal residential building.

Editorial team
The space features a bright, spacious interior with exposed timber structure, where beams and floor slabs create a warm and orderly atmosphere. The combination of natural light, light‑coloured surfaces and timber elements conveys a sense of openness and comfort.
Energy efficiency at the Maritime Academy of Saint‑Malo

The Academy is a compact building with natural ventilation, a timber structure, and efficient façades that reduce thermal losses and energy consumption, achieving strong passive performance and an operation aligned with low‑energy objectives.

Editorial team
The building features modern architecture with clean lines, large windows and a light façade that conveys a sense of brightness. The scene includes a few people and vehicles in motion, suggesting everyday activity in the urban surroundings.
Architecture that drives efficiency at LSC Contern

A high‑efficiency building in Luxembourg that combines reversible heat pumps, self‑consumption photovoltaics, and an optimised envelope with natural insulation and a modular timber structure to achieve outstanding energy performance.

Editorial team
The building features modern architecture with expansive glass façades that reflect the sky. Two main volumes rise above an elevated platform, distinguished by their vertical lines and contemporary design.
Riga’s Verde offices meet sustainable building standards

Capitalica Asset Management has completed and commissioned the second building of the Verde office complex in Riga. The complex complies with BREEAM and near-zero energy performance standards, promoting energy-efficient building use.

Editorial team
The image shows the interior of a modern building with a spacious atrium illuminated by natural light coming through a glass roof. At the centre stands a large black spiral staircase connecting several floors, surrounded by metal railings. The walls are made of light concrete with aligned rectangular windows, and in the foreground, green plants add a natural touch to the space. The design blends industrial and contemporary elements, creating an open and bright atmosphere.
Circular architecture and clean energy in Luxembourg

LSC’s headquarters in Contern redefines sustainable construction: a hybrid structure, circular materials and renewable energy are combined to create a flexible, efficient and healthy space certified by DGNB and BREEAM.

Editorial team
The image shows a modern building with a light stone façade and large windows, surrounded by lush vegetation including palm trees and shrubs. On the front of the building, the text “MAISON DU DEVELOPPEMENT DURABLE” appears alongside Arabic characters, indicating an institution related to sustainable development; the sky is partly clear with some clouds, creating a bright and warm atmosphere.
Sustainable house in Tangier: positive energy in action

The House of Sustainable Development in Tangier is a building that produces three times the energy it consumes thanks to renewables and bioclimatic design. It combines clean technology and passive solutions to deliver comfort, cut emissions, and showcase the future of energy efficiency.

Editorial team
The image shows a modern multi-storey building with a light-coloured façade and windows arranged in horizontal rows. In the foreground, a green tree contrasts with the structure, while the sky is partly cloudy with large white clouds, creating a bright and calm atmosphere.
Sustainable renovation at the Mergelina Faculty

The renovation of the Mergelina Faculty (Valladolid, Spain) transforms a 1960s building into a benchmark for efficiency: advanced insulation, smart solar control and ventilation with heat recovery cut energy demand and enhance comfort without losing identity.

Editorial team
Showing 10 of 205 case studies