He was influenced by the work of the Italian architects Raimondo D'Aronco and Ernesto Basile.
One of the buildings attributed to him is a landmark house at 225, Tower Road, Sliema which was built in 1914 for Antonio Cassar Torregiani.
These were apartment blocks built for the Marquis John Scicluna, and they were richly ornamented buildings having large terraces.
[6] According to Edward Said, Psaila " designed and built a number of houses in Sliema, such as a single house in Lower Victoria Terrace (now Triq Dun Karm Psaila) with columned entrance and floral motifs above the front door, triangular ventilations and railings on the balcony; a pair of dwellings in St. Margaret Street with metallic plates on the front door, houses in Stella Maris Street with circular window designs, houses in Windsor Terrace with elegant gate styles and houses in Ghar Lembi Street and Tower Road.
Also on Tower Road the present Lombard Bank premises are attributed to Psaila, this building being to many the culmination of the Art nouveau liberty style in Sliema.