Terrigal Presbyterian Church was cordoned off as a crime scene after a fire late on Saturday night engulfed the building.
Just before midnight on December 2 crews from Fire and Rescue Terrigal rushed to the Willoughby Rd church where they found the building well alight.
Firefighters worked quickly to extinguish the fire but there is substantial damage to the church building.
No injuries were reported.
The cause of the fire that ripped through the church is now being investigated by police.
Police are also investigating a fire at Killarney Vale at about 2pm on Thursday, November 30.
The Farrar Rd home was fully alight and extra Fire and Rescue crews were called in to help contain and extinguish the fire but not before there was extensive damage to the property.
All occupants fled the house before the fire took hold.