Climate Risk & Vulnerability Assessment
Where an applicable technical screening criterion invokes Appendix A, a robust CRVA identifies material physical climate risks and assesses adaptation solutions. Appendix A does not establish a universally named six-step method.
Legal Basis
Appendix A to Commission Delegated Regulation (EU) 2021/2139 sets generic DNSH criteria for climate change adaptation. It specifies three assessment steps: screening, assessing the materiality of identified risks, and assessing adaptation solutions.
For building activities, the applicable activity-specific technical screening criteria determine when Appendix A or equivalent CRVA provisions apply. NACE references alone do not establish taxonomy alignment.
The assessment is forward-looking and proportionate to the activity’s scale and expected lifespan. It uses climate projections at the smallest appropriate scale for lifespans under 10 years and the highest available resolution across a suitable scenario range for longer-lived activities.
CRVA
A CRVA can be relevant to substantial-contribution and DNSH criteria, depending on the technical screening criteria for the specific activity.
A Practical 6-Part Implementation View
Appendix A itself names three assessment steps. The six parts below are a practical way to organise assessment, implementation, and monitoring; they are not prescribed step names or a mandatory sequence in the Regulation.
Screening
Consider as a minimum the indicative, non-exhaustive list of physical climate hazards in Appendix A. Identify which hazards may affect the activity based on its location, function, and expected lifetime.
Climate Risk Assessment
Assess the materiality of identified hazards using forward-looking climate data. The depth, scenario range, and resolution are proportionate to the activity’s scale and expected lifespan.
Risk Evaluation
Evaluate vulnerability and exposure. Determine whether existing conditions or planned design already mitigate the risk, or whether additional adaptation measures are needed.
Adaptation Plan
Define adaptation solutions for each material risk. Solutions must reduce the identified risk without creating maladaptation, and must be consistent with local, sectoral, and regional adaptation strategies.
Implementation
For new activities and existing activities using newly built physical assets, integrate adaptation solutions into design and construction before operations begin. For activities using existing physical assets, solutions may be implemented over up to five years under an adaptation plan.
Monitoring & Review
Monitor implemented adaptation solutions against pre-defined indicators and consider remedial action where those indicators are not met.
Screening
Consider as a minimum the indicative, non-exhaustive list of physical climate hazards in Appendix A. Identify which hazards may affect the activity based on its location, function, and expected lifetime.
Use forward-looking climate projections at the scale and over the time horizon appropriate to the activity’s expected lifetime. Historical observations may provide context but do not replace those projections.
Climate Risk Assessment
Assess the materiality of identified hazards using forward-looking climate data. The depth, scenario range, and resolution are proportionate to the activity’s scale and expected lifespan.
Use best practice and available guidance, state-of-the-art science, recent IPCC reports, peer-reviewed publications, and suitable open-source or paid models. Appendix A does not prescribe CFD.
Risk Evaluation
Evaluate vulnerability and exposure. Determine whether existing conditions or planned design already mitigate the risk, or whether additional adaptation measures are needed.
Consider cascading risks, for example a flood risk combined with power grid vulnerability. Evaluate the interaction between hazards.
Adaptation Plan
Define adaptation solutions for each material risk. Solutions must reduce the identified risk without creating maladaptation, and must be consistent with local, sectoral, and regional adaptation strategies.
Adaptation measures range from structural solutions such as cool roofs and drainage to nature-based and operational measures such as monitoring and early warning systems.
Implementation
For new activities and existing activities using newly built physical assets, integrate adaptation solutions into design and construction before operations begin. For activities using existing physical assets, solutions may be implemented over up to five years under an adaptation plan.
Document methods, assumptions, data sources, measures, and indicators so the evidence can be reviewed. Appendix A does not designate a specific assurance method.
Monitoring & Review
Monitor implemented adaptation solutions against pre-defined indicators and consider remedial action where those indicators are not met.
This monitoring requirement concerns the implemented solutions; Appendix A does not define a recurring six-step CRVA cycle.
RCP Scenarios Explained
For activities with an expected lifespan of 10 years or more, Appendix A calls for state-of-the-art projections across the existing range of future scenarios consistent with that lifespan. Its footnote lists RCP 2.6, RCP 4.5, RCP 6.0, and RCP 8.5; it does not prescribe a fixed three-scenario set for every assessment.
One of the IPCC representative concentration pathways identified in the Appendix A footnote.
One of the IPCC representative concentration pathways identified in the Appendix A footnote.
One of the IPCC representative concentration pathways identified in the Appendix A footnote.
One of the IPCC representative concentration pathways identified in the Appendix A footnote.
Choose a proportionate scenario range
Assessment depth and resolution depend on the activity’s scale and expected lifespan. Activities under 10 years use projections at the smallest appropriate scale; longer-lived activities use the highest available resolution across a suitable range, including at least 10-to-30-year projections for major investments.
The Maladaptation Principle
Appendix A requires implemented adaptation solutions not to adversely affect the adaptation efforts or resilience of other people, nature, cultural heritage, assets, or other economic activities.
Examples of maladaptation:
Air conditioning overreliance
Increases energy demand, contributes to outdoor heat, and fails during power outages
Hard flood defences
May redirect floodwater to neighbouring properties or destroy riverine ecosystems
Excessive impervious surfaces
Reduces localised flooding but increases downstream runoff and heat absorption
Single-hazard focus
Sealing a building against heat without considering ventilation needs during heatwaves
The evidence method should match the material risks. Qualitative, geospatial, engineering, and modelling evidence may all be relevant; CFD is an optional supporting method for some local wind or thermal questions, not a Taxonomy requirement.
Optional Quantitative Evidence Where Proportionate
Appendix A does not require CFD. Where local wind or thermal conditions are material, CFD may complement climate projections and engineering analysis with project-specific evidence, provided its assumptions, inputs, and limitations are documented.