After having raised US$1100 (February 4, 2018 equivalent: $17,832.09), a small church building was built in a week on New Hampshire Avenue.

Church records of tentative specifications for St. Mary's include specific details for a great deal of wood carpentry, including oak and birch wood with oil staining, varnish, and Lammens "Permo" waterproof brush coats, as well as hand made mission tiles for the roofing.

Galvanized iron, steel, copper, concrete, and other materials help complete St. Mary's.

Finials, decorative additions at the top of the building's façade, were included as well, made of cast stone.

[2] A part of its architecture also includes an addition made in the mid-1900s wherein the altar space was changed slightly to accommodate a 16th-century della Robbia faience from Florence.

According to church records, the remodel of the sanctuary to accommodate the della Robbia required extensive flexibility.

The organ at St Mary's was originally built in 1906 for the S.A. Sanderson residence in Long Beach, California.

In 1927, William Ripley Dorr purchased the organ for his studio in Los Angeles, California.

Bach •"Magnificat and Nunc Dimittis" by Orlando Gibbons •"How Lovely is Thy Dwelling Place" by Johannes Brahms •"Kyrie" and "Agnus Dei I" from Palestrina's "Missa Brevis" St. Mary's has a rich tradition with regards to their celebration of the Mass.

There are also more people involved with the ceremonial aspect of the Mass helping the priest, usually including a deacon and a subdeacon.