Towards Greener Building Codes: The New Sustainability Document in Spain’s CTE Building Regulations
Sustainability is set to take on a more prominent role in Spain’s building regulations. The upcoming revision of the Código Técnico de la Edificación (CTE).
Towards Greener Building Codes: The New Sustainability Document in Spain’s CTE Building Regulations
Sustainability is set to take on a more prominent role in Spain’s building regulations. The upcoming revision of the Código Técnico de la Edificación (CTE), expected in 2026, will introduce a new section: the Basic Document on Environmental Sustainability (DB-SA). This new regulation aims to integrate more robust environmental criteria into the design, construction, and operation of buildings across Spain.
What is the DB-SA?
The DB-SA will be a new section within the CTE that introduces mandatory requirements for assessing the environmental impact of buildings throughout their entire life cycle. The goal is to support decarbonisation and circular economy practices in the built environment by requiring more data-driven sustainability measures.
Life Cycle Assessment (LCA)
At the heart of the DB-SA is the Life Cycle Assessment (LCA) methodology. This approach evaluates a building’s carbon footprint from raw material extraction through construction, use, and demolition. The LCA provides a complete picture of environmental impact across every phase of a building’s life.
Focus on Material Carbon Footprint
The regulation will promote the use of low-carbon construction materials, encouraging products that generate fewer emissions during manufacturing, transport, and installation. Product Environmental Declarations (EPDs) will play a key role in demonstrating performance.
Energy Efficiency and Renewable Energy
Beyond the building envelope, the DB-SA will support the deployment of renewable energy systems and reinforce energy efficiency strategies to minimise overall environmental impact. These measures complement the existing energy-related requirements in DB-HE.
Aligned with EU Level(s) Framework
The DB-SA will be aligned with Level(s), the European Commission’s voluntary sustainability framework for buildings. This will help harmonise environmental metrics across the EU and support compliance with European climate goals.
Integration into the Energy Performance Certificate
LCA results and carbon footprint data will be integrated into the Energy Performance Certificate (EPC) of each building, expanding the EPC’s scope beyond operational energy use to include embodied emissions and material impact.
Public Consultation and Timeline
A public consultation for the new DB-SA took place in October 2024, gathering feedback from stakeholders across the sector. Final approval is expected in the second half of 2026, according to the Ministry of Transport, Mobility and Urban Agenda.
Conclusion
The introduction of the DB-SA marks a major step forward in climate-aligned building regulation in Spain. By requiring full lifecycle carbon accounting and encouraging low-impact design strategies, the CTE is evolving toward a future of net-zero, resource-efficient buildings.
