France mandates green roofs or solar panels on buildings
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Starting July 2026, France requires many new and heavily renovated buildings to cover a portion of their roofs with either vegetation or solar panels. This requirement will increase to 50% of roof area by July 2027.
The law applies to commercial, industrial, and administrative buildings exceeding 500 square meters, as well as structures like schools, hospitals, and parking garages.
Building owners can choose between installing renewable energy systems or creating vegetated roofs that limit water usage, improve thermal performance, and support biodiversity. The regulations also extend to parking lots. New parking areas over 500 square meters connected to covered buildings must incorporate permeable surfaces or vegetation to manage rainwater. Larger parking lots exceeding 1,500 square meters will need at least half of their area covered with structures that generate renewable energy, potentially combined with vegetation, starting in November 2025.
France implemented these rules to increase renewable energy production and adapt urban spaces to hotter temperatures and heavy rainfall by utilizing existing surfaces. While exceptions exist for technical or economic constraints, the country aims to integrate environmental considerations into building projects. Italy has also updated its renewable energy requirements for new buildings, but France’s approach directly addresses roof and parking lot surfaces.
