The Sacred Heart of Mary Basilica was designed by Father José Viladrich, architect and Brother Pedro Mas, the builder. The temple is raised over a basilica floor plan, formed by three naves.

It is built over rock foundations and with brick masonry, with a renaissance and neo-classic style.

The main façade is stuccoed with lime and four orders can be distinguished (Tuscan, Corinthian Ionic and Doric). It is harmoniously symmetrical and is formed by over pilasters that give place to five modules: the three central ones that house the three carved wooden doors that give access to the naves; plus two extremes that are the bases for the two octagonal towers. The frieze and the cornice cantilever run through all the façade uniting all the elements.

The central nave, the higher of the two lateral ones, ends in a triangular pediment that receives the gable roof and is enriched with over pilasters, frieze and a cornice, with a large oculus in the center. The two lateral towers are raised with a decreasing compound formed by three tambours, one on the corner and the other two octagonal, covered by a dome of eight side skirts that finish-off in a pavilion. The body of each tambour ends in a frieze and a cornice that borders all the perimeter and the edges are provided with over pilasters. The two first bodies are open on four sides by Roman gaps or openings and the last tambour is open on eight sides.

The seal of the basilica stand out in relief and the other two that honor the Heart of Mary, all adorned with angels.

The lateral facades lack ornamentation and the brick is on-sight. The over pilasters frame the window gaps and the access openings.

The interior is stuccoed and the naves are separated by semi-circular arches; the central nave ends in romantic style vaults, whose transverse arches and edges are ornamental and give place to the clerestory, provided with circular windows. The lateral naves have lintels with a wooden ceiling and adorned with plaster moldings in boxes that on the center have a rosette; there are large windows with Roman arches.