The website for St Aloysius Church explains that, "In the late eighteenth-century the district of Somers Town, which was just then being developed, became something of a centre for French émigré clergy. A chapel was established here in 1798 by Abbé Chantrel which was replaced in 1808 by a new and larger building in the Classical style erected for Abbé Carron in Phoenix Road."  This church was built in the mid 1960s when it became clear that the congregation required a larger building.

The main body of the church is described as, "... an elliptical brick drum with a continuous concrete clerestory set on a raised flat-roofed brick podium, which is bookended by the taller presbytery and narthex. .... The floor of the church is Genoa Green terrazzo, the walls are faced with grey Tyrolean plaster, the ceiling of the drum has Parana pine boarding. To the right of the sanctuary is a recess for the reserved sacrament with a ceramic mural by Adam Kossowski. "