Located in the unincorporated community of Sebastian, it is the home of an active congregation and has been declared a historic site because of its well-preserved early twentieth-century Gothic Revival architecture.

[8] Andrew DeCurtins, Anton's son, was chosen as the architect for the new structure; he employed stone for the foundation, pressed brick (laid in a stretcher bond) for the walls, and slates for the roof.

Inside, the church is equipped with a basement, while its most impressive feature is a vaulted ceiling decorated with multiple High Gothic Revival reredos.

St. Sebastian's is typical of the churches of the third generation, which are generally Gothic Revival structures with a single central tower.

[6]: 4  Two of its most elaborate features are a heavily ornamented entrance, decorated with stained glass and multiple transoms, and a central rose window that illuminates the second floor.

Although the rectory remains in a condition similar to the time of its construction, it has been expanded; a single room and a garage have been attached to its southern end, between the old part of the house and the rear of the church.

A parish cemetery is located nearby,[10] while the distance between the front door and Sebastian Road is lined with small trees.

Among the few nearby buildings is an old house located adjacent to the church property's eastern boundary; it is believed to have been built during the 1850s as a general store.