[3] El Cortijo was designed for the Lozana-Fabián family by Rafael Carmoega Morales, a graduate of architecture from Cornell University who worked as state architect in Puerto Rico between 1921 and 1936.

Secundino Lozana Cepa and Josefina Fabián Finlay, the original owners of the country house, were sugarcane plantation administrators during the early-20th century sugar industry boom in Puerto Rico.

The façade of the main house incorporates textured stuccos, exposed wooden beams and ojos de buey (bull's-eye) and air vents.

Other notable adornments include the coat of arms of Spain carved in stone in both above the main entrance and in the foyer, and a decorative bronze depiction of the Santa Maria caravel located atop of the building tower.

Another notable element is a tiled replica of the famous icon by Andreas Rizo de Candia of Our Lady of Perpetual Help (Nuestra Señora del Perpetuo Socorro) in the entrance foyer.

Carmoega was highly inspired in the Catalonian modernism of Antoni Gaudí's Parc Güell evident in the design of the garden pathways, fountain, benches and, most notably, the trencadís in the property.