A dream beach house in Florida has turned into a nightmare for a Missouri couple.

Six months after the custom house was built along the Atlantic Ocean near Palm Coast, Mark and Brenda Voss learned it's on the wrong lot in the gated Ocean Hammock community.

Mark Voss tells the Daytona Beach News Journal they're in "total disbelief." The couple own 18 other residential lots in the community. They bought the lot in 2012 and hired Keystone Homes to build a three-story, 5,000-square-foot vacation rental for $680,000.

"We may have moved (to Ocean Hammock) someday. But, with this headache and grief, we're not so sure. The Midwest is looking pretty good right now," he told the paper.

Keystone vice president Robbie Richmond says the company is trying to negotiate a settlement. 

"The buck stops with the builder. We know that. We are in the process of trying to schedule a conference call and find a fair resolution without the lawyers," Richmond told the paper.

The couple hired a lawyer.

Keystone and Voss say the error can be traced to a 2013 survey. The mistake was uncovered in September after the house had been rented frequently.

The house comes with five bedrooms, a game room and a screened-in pool, the report said.

The Associated Press contributed to this report

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