LCAbygLCAbyg
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Background and development

About LCAbyg

LCAbyg is a tool that calculates life cycle assessments for buildings.

With LCAbyg you can calculate a building's environmental profile and resource consumption. You enter information about the building elements and, where relevant, the building's energy consumption. The tool automatically handles the LCA calculations and gathers the results into selected figures and a report.

It is calculated over the building's entire life cycle and therefore includes the extraction of raw materials, production of building materials, energy and resource consumption during operation and maintenance, as well as disposal and, where applicable, reuse of building elements and materials.

Development of LCAbyg

LCAbyg was originally developed by SBi – the Danish Building Research Institute (now BUILD, Aalborg University) – with financial support from a range of stakeholders in Denmark. LCAbyg is now developed by LCAbyg ApS, an independent company, under an agreement with BUILD.

LCAbyg ApS, Liljevej 12, 2820 Gentofte. CVR [CVR-nummer].

Development originally drew on an Excel tool that BUILD developed for Green Building Council Denmark's DGNB certification of buildings in Denmark. The first version of LCAbyg was launched in 2015 for the Danish Energy Agency, as part of a construction policy strategy from 2014, in broad collaboration with a wide range of stakeholders in the Danish construction industry.

Since then, both small and large changes have continuously been made to the user interface and calculation core. LCAbyg is under constant development, with existing features being improved and new ones added — in close collaboration with the industry.

LCAbyg is used for e.g. education as well as by public and private entities, and the latest version makes it possible to calculate the climate impact requirements in the Building Regulations.

LCAbyg has previously been funded by

  • Villum Fonden and Realdania
  • BUILD, AAU
  • The Danish Energy Agency, the Danish Transport, Construction and Housing Authority, the Danish Housing and Planning Authority
  • Elforsk
  • Green Building Council DK (Rådet for Bæredygtigt Byggeri)
  • Grundejernes Investeringsfond

Previous versions

Do you need an earlier version of LCAbyg, for example for calculations under the rules from before July 1, 2025? See an overview of all versions and how to download them on the page Download LCAbyg.