Firefighters work to extinguish a large house fire Wednesday morning in the 7100 block of Inverway Drive in Lakewood. | Photo: Alex Vucha / Lake and McHenry County Scanner.

A Lakewood home was deemed a complete loss after a fire caused it to partially collapse and sustain $350,000 in damage, Crystal Lake fire officials said.

The Crystal Lake Fire-Rescue Department responded around 9:13 a.m. Wednesday to the 7100 block of Inverway Drive in Lakewood for a report of a structure fire.

Several 911 callers reported the house was well-involved in flames from the second floor.

Firefighters arrived and confirmed heavy fire conditions, according to Crystal Lake Deputy Fire Chief Chris Olsen.

The Mutual Aid Box Alarm System (MABAS) was activated for additional assistance and firefighters initiated defensive operations due to the amount of fire and instability of the structure, Olsen said.

Firefighters work to extinguish a large house fire Wednesday morning in the 7100 block of Inverway Drive in Lakewood. | Photo: Alex Vucha / Lake and McHenry County Scanner.

The residence was unoccupied because it was undergoing renovations. The structure partially collapsed during the blaze.

Olsen said the fire was declared under control at 11:04 a.m., just under two hours after firefighters arrived. The loss was estimated at $350,000.

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The cause of the fire is under investigation but Olsen said it is not believed to be suspicious.

There were no civilian injuries reported but one firefighter sustained a minor injury at the scene.

The Lakewood and Crystal Lake police departments, as well as firefighters from Algonquin, Barrington-Countryside, Cary, Elgin, Fox River Grove, Huntley, Marengo, McHenry, Nunda-Rural, Union, Spring Grove, Wauconda, West Dundee, and Wonder Lake assisted at the scene. The Salvation Army also provided assistance.