Hazardous material was discovered last month as crews prepared to replace the mayoral mansion 's leaky roof . Officials do not believe the work poses any health risk to Mayor de Blasio and his family , who will remain in the home during the renovation . The mayor has been living at Gracie Mansion since he took office in 2009 after serving two terms as New York City public advocate. Both jobs should be completed by October or November .
Hazardous material was discovered last month as crews prepared to replace the mayoral mansion 's leaky roof . Officials do not believe the work poses any health risk to Mayor de Blasio and his family , who will remain in the home during the renovation . Work will take place at same time as replacement of the mansion 30-year-old roof . Both jobs should be completed by October or November .