BR18 (Bygningsreglementet 2018): Denmark’s national building code

Reporting Requirements and Process

Environmental Reporting (LCA)

BR18 now includes mandatory LCA reporting for all new buildings. Since 1 January 2023, developers must prepare a life-cycle climate impact assessment covering the building’s environmental impact across a 50-year service life per standard methodologies (e.g., DS/EN 15978). This assessment must be completed to obtain occupancy approval and includes impacts from material production, energy use, and end-of-life stages.

Climate Impact Limits

Buildings meeting the LCA requirement must also comply with quantitative limit values for CO₂-equivalent emissions expressed in kg CO₂e/m²/year. For larger buildings (e.g., >1,000 m²), these limits apply from the permit stage onward and are tightened progressively (e.g., phased reductions from earlier values around 12 kg CO₂e/m²/year).

Documentation Tools

Calculation must be performed according to the specified national rules and often uses standardized data sources and methods. EPDs (Environmental Product Declarations) or equivalent life-cycle environmental data are accepted to document material contributions within the LCA.

Penalties for Noncompliance

Failure to submit the required LCA climate impact documentation or to meet the prescribed CO₂e limits can delay or prevent occupancy permits (ibrugtagningstilladelse). BR18 includes enforcement mechanisms under the Building Act, where municipalities may refuse approval until compliance is demonstrated, similar to other performance requirements.

Current Status

• 1 January 2023: BR18 climate requirements entered into force, requiring LCA documentation for new buildings and CO₂e reporting for larger projects.

• 1 July 2025 and beyond: The scope of applicability broadens (e.g., lower size thresholds and additional typologies) with tightened CO₂e limit values and separate emission caps for the construction process.

BR18’s environmental reporting provisions are now an established part of Denmark’s regulatory framework for sustainable construction.

Resources

• BR18 Official Technical Rules: Bygningsreglementet (Denmark’s building code) detailing climate impact and LCA requirements (§ 297–§ 298).

• Social- og Boligstyrelsen — Klimakrav (LCA) i Bygningsreglementet: Official guidance on the national LCA/climate documentation requirements. Sbst

• DI Byggeri — FAQ on BR18 Climate Calculations: Practical interpretation of LCA and documentation requirements under BR18.