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CWA 18304:2025

Guidelines to establish the carbon bill of the refurbishment of buildings CWA 18304:2025

General information

60.60   Standard published   Nov 12, 2025

CEN

CEN/WS Carbon Bill

CEN/CENELEC Workshop Agreement

13.020.20   Environmental economics. Sustainability | 91.040.01   Buildings in general

Scope

This document defines the carbon bill (CB) of a building based on the global warming potential calculated according to EN 15978. The CB of a refurbishment compares the situation of the refurbished building and the situation without the refurbishment.
NOTE This document is based on the draft FprEN 15978:2025 (WI 00350041), which should be available as EN 15978:2025 in December 2025. However, the approach is considered valid for the previous version, EN 15978:2011.

Life cycle

NOW

PUBLISHED
CWA 18304:2025
60.60 Standard published
Nov 12, 2025




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