This paper aims to explore the applicability of the standardization of heritage and sustainability values in the context of church transformations in the Netherlands. Through comparative research on available assessment tools, specifically focusing on church transformations, the study investigates whether these tools extend beyond their original purpose of standardization, and therefore, if this standardization of values can be used in the design process. The central question is articulated as follows: How can standardization of sustainability and heritage values be used in the design process of church transformations in the Netherlands?

The comparative literature research identifies two pertinent tools, DuMo and BPSC, both addressing standardization of sustainability and heritage values with distinct methodologies. The analysis of these tools' applicability in practice leads to the second phase of the research, aiming to determine if the core indicators of these tools can facilitate in the decision-making process of church transformation design.

While assessment tools primarily seek to standardize values, this paper explores their potential applications standardization of values can have in the design approach. Although not initially created for the purpose of design, the standardization achieved through these tools can enhance comprehension of various considerations in different stages of the design process. In conclusion, this research contributes to the existing framework on the standardization of heritage and sustainability values, specifically within the context of church transformations in the Netherlands.