Abstract: In Hong Kong, over half of the Protestant churches are located in the upper-floor units in commercial and residential buildings. Because of their physical locations, these churches are sometimes dubbed ‘upper-floor churches’. Unlike those that occupy stand-alone religious buildings or dwell in church-run schools and social service centres, these are often invisible in the landscapes of the city. Through analysis of a case study, this paper aims to explore the spatial practices that a Protestant community has adopted in acquiring, representing, and ritualising a business unit in a residential high-rise for building up their church. Our analysis of the case study shows that in a metropolis like contemporary Hong Kong, the construction of sacred space is full of tensions between utilitarian calculations and concerns of human relations and religious values. While the congregation had been very creative in transforming a commercial unit into a religious site, it did not show much awareness of the oppressive powers of the capitalist market and had a strong tendency to represent its spatial practices as commodities for consumption.