Notre Dame Parish in New Hyde Park was wrongly sent a bill for $676,634 in school taxes last month, according to county records.

The Nassau Assessment Department error led to a $16.7 million assessment on the tax-exempt property. 

The Diocese of Rockville Centre, which owns the property, received the bill. State law exempts houses of worship, which are nonprofits, from property taxes. 

The diocese alerted North Hempstead Receiver of Taxes Charles Berman, who said tax rates will be affected after corrections are made. Berman also informed the county of the mistake once he was made aware of it. 

“There’s $16.7 million of market value that was put on the tax rolls that doesn’t belong there,” Berman said in a statement to Newsday. “That’s going to be taken off, so that impacts all the tax rates.”

Berman said the parish, located at 45 Mayfair Rd., sold a single-family home on its property for $630,000, which is what the county should have removed the tax exemption for rather than the entire property.

The school tax bill of the home’s new owner on 9 Aberdeen Rd. was taxed as a class 4 commercial property, which uses 1% of market value and commercial rates, Berman said.

“He should have been taxed as a class 1 residential property using .10% of market value and residential rates,” Berman said to Blank Slate Media.

Sean Dolan, spokesman for the diocese, told Newsday they were thankful the county and the town of North Hempstead acted swiftly to remedy the problem.

“The Parish of Notre Dame in New Hyde Park acknowledges this is simply an error and is grateful to the county Assessor and Town of North Hempstead receiver of taxes for their prompt attention to this matter,” Dolan said in a statement.