This doctoral thesis is an exploration of Jamaica’s informal construction sector, unpacking its labour distinctiveness, actors, and activities while examining its deep-seated connections to the island’s historical, cultural, and socio-economic context. Through nine months of ethnographic engagement with an informal building construction crew, the thesis provides insights into the motivations of workers, interactions in the workplace, the culture of informal construction, and contributions to the national economy. At its core, the study questions the persistence of Jamaica’s informal construction industry within the hegemonic context of a Western market economy. In this context, I examine the dynamics of class culture, including the rituals and forms of exchange among workers in this industry. The blurred lines between formal and informal aspects of building construction as well as the reproduction of technical knowledge also hint at reasons for the tenacity of the informal economy. I critically engage with the concept of precarity to examine the long history of precarious lives in Jamaica. I explore the dichotomy of alienation versus ownership, emphasising the informal sector’s capacity to foster a sense of ownership in contrast to the alienation often experienced in formal systems. I also shine a light on gender disparities, discuss performances of masculinity and unveil the roles and experiences of women in this male-dominated environment. Finally, the study addresses the significant impacts of the 2019 Sars Cov2 pandemic on the social and economic realities within informal construction.