Firefighters encounter heavy flames and smoke coming from a house in the 1400 block of Fountain Green Drive in Crystal Lake after a fire started on a deck early Monday morning. | Photo: Tyler Tobolt / Lake and McHenry County Scanner

Residents were displaced from their home after a fire started on a rear deck and quickly engulfed their house in Crystal Lake early Monday morning.

The Crystal Lake Fire Rescue Department responded around 4:40 a.m. Monday to the 1400 block of Fountain Green Drive in Crystal Lake for a report of a structure fire.

Crystal Lake Fire Rescue Battalion Chief James Sustek said the homeowner called 911 to report the deck in the rear of the house was on fire.

Firefighters arrived in six minutes and confirmed the deck at the rear of the residence was on fire. The fire had spread to the residence.

Firefighters encounter heavy flames and smoke coming from a house in the 1400 block of Fountain Green Drive in Crystal Lake after a fire started on a deck early Monday morning. | Photo: Tyler Tobolt / Lake and McHenry County Scanner

The homeowner reported that everyone was out of the residence and accounted for, Sustek said.

A search of the two-story, single-family home confirmed no one was inside.

Sustek said multiple hose lines were used to extinguish the fire.

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The blaze was deemed under control at 4:52 a.m.

The home sustained significant fire damage to the rear of the structure, Sustek said.

Firefighters encounter heavy flames and smoke coming from a house in the 1400 block of Fountain Green Drive in Crystal Lake after a fire started on a deck early Monday morning. | Photo: Tyler Tobolt / Lake and McHenry County Scanner

The residence also sustained water and smoke damage throughout.

Damage to the residence and content was estimated at $100,000. The home has been declared uninhabitable.

There were no injuries to any firefighters or residents of the home, Sustek said.

The cause of the fire is undetermined and under investigation by the Crystal Lake Fire Rescue Department.