The church's 21st century renovation was the result of extensive study of its spatial requirements.  This study confirmed the need to create a new space and to minimize the flexibility of existing spaces while providing modern heating and cooling for the entire complex.

As a result, the entire project team had to create the new spaces and later the existing interior spaces without visually altering the appearance of the exterior, which is part of the Upper East Side Historic District.

Included in the project was extensive renovation of the main worship space in the the church sanctuary.  The original wood-framed church floor was removed and replaced with a new steel and concrete structure that was finished with stone and mosaic marble tile.  The 20-year-old pews were refurbished and some of the church's stained glass was cleaned and relocated to more prominent locations. 

To further meet the challenge of maximizing the interior space, social and educational spaces in Donegan Hall and the East Hall, located beneath the sanctuary, were redesigned and reconfigured for alternate religious uses and to meet the need for more flexible classroom space for religious functions, parish life and community outreach programs.