The Carriage House was used for many years as the parish office and for storage. In 2022 the parish office was relocated and the building became vacant. The Carriage House was constructed around 1882 and is one of the few remaining examples of 19^th century board and batten exterior siding remaining in the Mission San Jose Historic District. The city designated the Carriage House as a primary historic resource for this reason despite the interior having been extensively altered over the years.  

After many years of deferred maintenance, the Carriage House needed repair to prevent further exterior damage and make the interior useable for parish ministries. In June 2024 the Parish received permission from the Diocese to repair the building.  Work was completed in December 2024 and included replacing the roof and exterior siding, replacing the leaky windows and damaged exterior doors, rebuilding the exterior stairs and building a new interior stair case to the second floor. 

Additional work included replacing the old dirt and concrete floor, minor structural reinforcement, replacing the old plumbing, electrical, and heating systems, connecting new rain gutters and downspouts to the storm drain, and providing new interior finishes.

This maintenance project was funded as part of the 2022 Parish Master Plan, using new parishioner donations for the project and available repurposed dollars from the canceled capital campaign for the former new church project.