Central York Fire Services is battling a fire in a house under construction in Aurora since early this morning.
St. John's Sideroad is closed in both directions, east of Yonge Street, to Industrial Parkway North, according to York Regional Police.
Police said the home is unoccupied and no injuries are being reported in the fire that began at about 3:45 a.m. Thursday, May 14.
Neighbour Tracy Smith said she awoke to the smell of smoke at about 4 a.m. and called 911 when she saw the flames shooting into the sky.
"I could see the flames from my driveway over the top of the house across the street. I called 911 but they had already arrived on the scene," she said. "My daughter and I headed over. My heart was racing, I had to see what was going on."
Initially, Smith said she was concerned the fire was occurring in a house in her neighbourhood.
She captured the fire consuming the mansion on video, as she and her daughter watched the firefighters from a safe distance, until the sun came up.
"I was relieved when I found (out) it was an unoccupied house, but it was so big we sat to watch it. We were there for two hours and it was still not under control."
The cause of the fire has yet to be determined.
Firefighters from Richmond Hill and East Gwillimbury are also on the scene.