Among Porrata-Doria's works are Banco Crédito y Ahorro Ponceño, the Ponce Cathedral (whose 1932 fascade is Porrata's design), Banco de Ponce, and the Fernando Luis Toro Home.
He also designed the famed Teatro Fox Delicias (today a hotel), the Hotel Meliá (still in operation), the El Cometa Building (today headquarters of the Ponce Municipal Assembly, next to city hall), the San Lucas Hospital (on Guadalupe street) and the Dr. Pila Clinic (now an apartment building).