Directive (EU) 2024/1275, known as the recast Energy Performance of Buildings Directive (EPBD 2024), entered into force on 28 May 2024 following publication in the Official Journal of the European Union on 8 May 2024 (reference DOUE-L-2024-80664), according to EUR-Lex. The directive consolidates and repeals the previous versions of the EPBD (2010/31/EU and its 2018 amendments), and its central objective is the full decarbonisation of the EU building stock before 2050. For Member States, the immediate pressure point is the transposition deadline of 29 May 2026. According to the European Commission Directorate for Energy, failure to complete transposition by that date exposes Member States to infringement proceedings. For engineering teams and asset managers working across EU jurisdictions, this creates a live compliance landscape with multiple simultaneous deadlines rather than a single regulatory event. | The scale of the challenge becomes clear when examining specific Member State progress. According to BUILD UP, the European Commission platform for building energy efficiency, an analysis of Spain's implementation status indicated that the country had achieved approximately 60 per cent adaptation around the time of the May 2026 transposition deadline. This figure illustrates that a significant segment of the technical and administrative obligations derived from the directive still required specific regulatory development or updating of existing national instruments. The picture across other EU Member States is similarly uneven, and engineering consultancies advising on cross-border portfolios must account for jurisdiction-specific gaps rather than assuming uniform implementation. | One of the most immediate changes introduced by EPBD 2024 concerns energy performance certificates (EPCs). According to BUILD UP, from 29 May 2026 all EPCs must use the mandatory A-to-G scale and the template format defined in Annex V of the directive. The purpose of this harmonised format is twofold: to enable comparability of property assets across the EU, and to provide more actionable information on recommended improvement measures. The updated EPC must also include information on the global warming potential of embodied carbon, the smart readiness indicator (SRI, measuring a building's readiness for smart grid integration), and linkage to the renovation passport. These requirements oblige competent authorities and certification bodies in each Member State to update their inspection procedures, calculation methodologies and registration systems. For asset-intensive building typologies such as hospital estates, educational campuses and large commercial portfolios, correct modelling of the revised EPC indicators is critical to meeting deadlines and avoiding administrative penalties. | The renovation passport is one of the most substantive new instruments introduced by EPBD 2024. According to MITECO (the Spanish Ministry for Ecological Transition and Demographic Challenge), the directive requires Member States to establish a renovation passport scheme based on Annex VIII of the directive, with a deadline of 29 May 2026. Unlike a standard EPC, which records the current energy state of a building, a renovation passport is a personalised roadmap describing a staged deep renovation towards the highest possible energy performance, ideally near-zero energy building (NZEB) standard or better. The document must include sequential intervention measures, each with estimated energy savings, approximate costs and temporal priority. Its technical value lies in enabling phased investment planning, minimising the risk of stranded assets and maximising access to public funding instruments. For engineering teams, producing a rigorous renovation passport requires a detailed energy model of the existing building, multi-scenario improvement analysis, estimation of both embodied and operational carbon emissions, and coordination with regional certification registries. | Solar energy integration requirements under EPBD 2024 introduce another binding deadline for new construction. According to MITECO, in its guidance on Spanish implementation of the directive, all new public and non-residential buildings with a useful floor area above 250 square metres must be equipped with solar installations before 31 December 2026, where technically and economically feasible. This obligation then extends progressively to other building categories in subsequent phases. The directive frames solar provision not as an optional enhancement but as default infrastructure, a significant shift in regulatory philosophy. For project teams working on energy generation and distribution facilities, this convergence between building regulation and energy regulation requires coordinated input across building services, structural engineering and planning disciplines from the earliest project stages. Where a technical or economic exception is claimed, that position must be clearly documented in project records from the design stage onwards. | Looking beyond the May 2026 deadline, the EPBD 2024 calendar extends to 2028 and 2030 with requirements that are already relevant to projects currently in design. According to BUILD UP, the first binding whole life-cycle assessment (LCA) requirements will begin to apply to large buildings from 2028, extending to all new buildings in 2030. In the context of EPBD 2024, LCA measures the global warming potential across the full building life cycle, including construction materials, operational phase and demolition, expressed in kilograms of CO2 equivalent per square metre per year. Projects currently being designed for large floor areas must therefore incorporate LCA methodologies in their technical documentation to be compliant when those requirements take effect. This is particularly relevant for industrial and manufacturing facilities, where buildings combine high technical loading with floor areas that frequently exceed the thresholds triggering the most demanding obligations. Additionally, according to the European Commission Directorate for Energy, Member States are required to submit their final national building renovation plans before 31 December 2026, quantifying the existing building stock, decade-by-decade renovation targets, and associated financing measures. These national plans will define the priority framework against which national and European funding calls are aligned. | The combined regulatory environment created by EPBD 2024 and existing instruments produces a compliance landscape with several concurrent obligations for owners and engineering teams. EPCs issued before May 2026 may require revision if they do not conform to the Annex V format, particularly in property transactions occurring after that date. Owners with renovation plans should assess whether a renovation passport is more appropriate than isolated interventions, given that the passport may be a prerequisite for accessing specific public funding lines. New-build projects exceeding 250 square metres in public or non-residential use must verify solar installation feasibility from the outline design stage, with documented justification for any claimed exception. Engineering teams working on large-footprint buildings should integrate LCA procedures into their standard workflows now, rather than waiting for the 2028 implementation date. Furthermore, energy audits carried out under existing national transpositions of the Energy Efficiency Directive must be made coherent with the new EPBD 2024 indicators, in particular the global warming potential metric and the smart readiness indicator. The technical complexity of meeting these overlapping obligations across multiple jurisdictions makes structured information management and rigorous energy modelling foundational requirements for any compliant project delivery process.