This paper presents an iterative framework for carrying out fieldworks on biodeterioration studies in the built environment with specific reference to the fieldwork on Microbial Colonisation of Building Finishes and Facings in Enugu. The paper discusses the step-by-step preparations prior to and during fieldwork and their importance in fruitful data collection, respondent’s responses and accompanied field interview. It highlights the pros and cons of fieldwork showing reasons why fieldwork is vital in biodeterioration research in the built environment. In doing so, the various stages of the fieldwork are discussed with their implications. At the end of the fieldwork, useful lessons learnt include the essence of digital compass in geolocation, the effect of good first impression during interview, and sourcing of data from government and organizations amongst others.