The family of slain NYPD cop Wenjian Liu was overcome with emotion Wednesday during a ribbon-cutting ceremony for their newly renovated Brooklyn home, paid for by an influx of donations from a city charity.

“This is now everyone’s home,” said Pei Xia Chen, Liu’s widow, who lost her husband on Dec. 20, 2014, when a man ambushed the 32-year-old officer and partner Rafael Ramos, 40, in Brooklyn.

“My family is so touched by all the love and support we received and have continued to receive for the past nine months,” said Chen through tears, wearing a pin with a portrait of her husband. “We would like to thank each and every one who contributed to this wonderful foundation — we couldn’t thank them enough.”

The Stephen Siller Tunnel to Towers Foundation also paid off the mortgages on both of the officers’ homes with the more than $1 million that the charity raised for the families.

Liu and Chen shared the Gravesend home on West Sixth Street with Liu’s parents, who were also in attendance at the ceremony, which opened with bagpipers from the NYPD’s Ceremonial Unit and an officer singing the Star-Spangled Banner. “My heart is still filled with pain and fear. I still cannot face the fact that my son is gone,” said Liu’s father, Wei Tang Liu, sobbing. “We can’t thank everyone enough. My son is always in my heart.”

From money that the foundation raised, an undisclosed amount was used to make a slew of repairs to the Liu home that workers started in April.

The renovations include new asphalt roofing to prevent leaks, new shingles, the installation of new windows throughout the home, gates in the back yard and a new front porch. The siding on the home was also replaced, and an air conditioning system was installed.

“Our goal for the foundation is to take sadness and bring some light,” said Frank Siller, the chairman and CEO of the Tunnel to Towers Foundation. “Your husband, your son has brought so many good people together to show you, you are not alone.”

Ramos’ wife, Maritza Ramos, and their teenage son Jaden were also present for the ceremony along with officers from Brooklyn’s 84th and 79th precincts.

Liu and Ramos were shot at in their patrol car by Ismaaiyl Brinsley, who later turned the gun on himself.