Mayor-elect Bill de Blasio and his family will be moving to mayoral residence Gracie Mansion on the Upper East Side, but they said Brooklyn, where they own a Park Slope row house, will always be their home.

De Blasio made the announcement on his transition website Tuesday following weeks of deliberations that he has said weighed the family's love of Brooklyn with security and logistical considerations.

"It's a tough decision. Brooklyn is our home and Park Slope is our neighborhood. And we love these places. In many ways, they've come to define who we are," the statement signed by de Blasio, his wife, Chirlane McCray, and their children, Dante, 16, and Chiara, 19, read. "No matter where we live while Bill is Mayor, this won't change."

"For a variety of reasons, like logistical and security concerns, we've decided to move to Gracie Mansion. It's a practical choice but one that we make with respect and gratitude for the people of New York City."

The statement commended the family's Brooklyn haunts, restaurants The Purity Diner and Bar Toto, and the Park Slope Armory YMCA, where de Blasio hosted thousands of supporters for his Nov. 5 inauguration night speech and celebration. The family said they would still frequent the spots.

They bought their Park Slope row house in 2000.

"We are humbled to join that great tradition," they wrote of living in Gracie. "After all, a home is more than just bricks and mortar -- it's the place you are with the people you love."

De Blasio, who takes office Jan. 1, previously said a move to Manhattan would make Dante's commute to Brooklyn Tech high school considerably longer. Chiara attends college in northern California. De Blasio had previously said the family would make their decision by Thanksgiving.

Many expected the de Blasios would opt to stay in Park Slope, though several security measures including the post of an round-the-clock guard would have been taken.

Mayor Michael Bloomberg chose not to live in Gracie Mansion, but rather renovate it and use it for ceremonial purposes including weddings and diplomatic functions. Bloomberg lives in his Upper East Side town house where an NYPD booth and guard are posted outside as part of his security detail.

His office declined to comment about de Blasio's move.