First responders were called to the 8800 block of Cochran Court, where there was a reported "heavy fire" in the back of a two-story home.
According to a Montgomery County Fire and Rescue Service spokesperson, the fire was largely knocked down before 7 a.m. on June 28, though crews remained at the scene for hours to knock down hotspots and clear the scene.
It is believed that the fire began on a back deck and possibly involved a grill and propane tanks.
The home suffered extensive damage that was estimated at $600,000, investigators said. Two adults and two children were displaced.
No injuries were reported.
Want breaking news in the DMV as it happens, or want to contribute? Join the DMV All Incidents Facebook group.
Click here to follow Daily Voice Mechanicsville and receive free news updates.