When firefighters arrived, flames were shooting from the roof. Photos from Chopper11 show flames and smoke pouring from the building.
A witness tells ABC11 that when she woke up she saw the flames and called 911. She also says a fire broke out at another townhouse about a month ago not far from Thursday morning's blaze.
According to an incident report, eight people have been displaced due to the fire spending to a total of four units. No one was injured.
The cause of the blaze has not yet been determined.