No injuries were reported after a home caught on fire early Tuesday morning in the 200 block of Plymouth Lane in Crystal Lake. | Photo: Alex Vucha / Lake and McHenry County Scanner

An alert neighbor who noticed a house fire in Crystal Lake early Tuesday morning called 911 and notified the residents to evacuate, fire officials said.

The Crystal Lake Fire Rescue Department responded around 3:11 a.m. Tuesday to the 200 block of Plymouth Lane in Crystal Lake for a report of a structure fire.

Crystal Lake Fire Rescue Department Battalion Chief Rick Kaiser said the fire was reported by a neighbor who saw flames on the outside of the home and called 911.

The neighbor notified the occupants of the residence and they all escaped unharmed.

Firefighters arrived in five minutes and found an exterior fire.

No injuries were reported after a home caught on fire early Tuesday morning in the 200 block of Plymouth Lane in Crystal Lake. | Photo: Alex Vucha / Lake and McHenry County Scanner

One hose line was used to extinguish the fire, Kaiser said. The fire was limited to an exterior wall of the garage.

Crews gained access to the structure and determined that the fire was contained in the garage.

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The residence remains habitable. A neighboring house did sustain some damage but also remains habitable.

The fire was deemed under control at 3:32 a.m. The Crystal Lake Building Department was notified.

Kaiser said damage to the residence is estimated at $20,000. There were no injuries to any firefighters.

The Crystal Lake Fire Rescue Department was assisted by several area fire departments.

The cause of the fire is undetermined and remains under investigation by Crystal Lake Fire Rescue investigators, Kaiser said.