PurposeModern Methods of Construction (MMC) have been promoted as a solution to address housing shortages and meet sustainability goals in the UK. However, the practical functioning of MMC, particularly in relation to early-stage environmental analyses, remains underexplored. This study aims to fill this gap by providing empirical insights into how architects engage in environmental analysis in early-stage MMC housing designs.Design/methodology/approachThis qualitative pilot study is based on a detailed case study of a UK architectural firm specializing in modular housing. Semi-structured interviews were conducted with eight architects with varying MMC experience. Thematic analysis of the qualitative data allowed for the exploration of key themes influencing early-stage environmental analysis, offering a narrative account of architects’ experiences in MMC practices.FindingsThe study reveals that environmental analysis in MMC is shaped by social, organisational and project-based factors. Three key themes emerged: uncertainty in environmental assumptions, dependencies on external consultants and the dominance of Passivhaus principles in design decisions. These factors challenge the integration of environmental considerations during the early design stages of MMC projects.Research limitations/implicationsAs this is a single case study, the findings might not be generalizable. Future research should expand on multiple firms and project settings to validate and broaden these findings.Originality/valueThis study provides an in-depth understanding of the challenges architects face when integrating environmental analysis into MMC. This reveals the relational and interdependent nature of environmental analysis in MMC projects, where decisions are shaped by multiple social, organisational and project-specific factors. By emphasizing these interdependencies, this study provides original insights into how environmental considerations can be integrated more effectively into the early design stages of MMC projects.