A home in the Oak Hill area was destroyed after a massive two alarm fire broke out Friday morning. The fire was reported just before 2 a.m. in the 700 block of Elysian Fields Road, off of Franklin Pike, north of Harding Place."It's a horrible shame, it's a beautiful house," said Paul Scholten, who lives on the street, "We socialized with our neighbor several times. They're wonderful people."Scholten said he and his family woke up to police pounding on their door, asking them to come outside as a precaution."We've never seen anything like this ever before," added Scholten.Neighbor Joe Grubbs told Nashville's News 2 he saw the flames from the kitchen of his neighboring home. "When I looked out, I could tell the end of the house, that's where it was coming from, and it just kept getting bigger and bigger, just [spread] quickly," said Grubbs. First responders said the fire had been burning for "quite some time" because flames were already shooting through the roof when they arrived.No one was home at the time of the fire. District Fire Chief Jim Norman, said the family was in Mobile, Alabama for spring break. They were expected to return home Friday.Fire officials said four people live in the home, including two teenagers.Chief Norman said they're not sure yet what sparked the fire, but believe it started in the living room. Due to the extent of the damage, much of the custom home's structure collapsed into the basement. The investigation is ongoing and is expected to take several weeks due to the extent of the damage. Records show that the house is appraised at $836,400. Chief Norman said the home nearly 6,000-square-feet. He said it was comparable to fighting a warehouse or building fire, rather than a typical home fire.Crews said the home's roof collapsed and the home is a total loss. However, they were able to save the garage and the attached mother-in-law suite.