The owners of the Brooklyn home where a collapsed wall killed a five-year-old girl blamed their builder Saturday for the tragedy.

The heavy concrete railing, supported by decorative balustrades, was put in seven months ago after the owners of 444 Harman St. in Bushwick hired City Wide Construction and Renovation of Valley Stream to install the structure.

It fell Thursday night and crushed Alysson Pinto-Chaumana as her mother watched in horror.

City Wide sent three men each day to build the railing and do additional concrete facade work on their home, building owners Harrichand and Radhica Netchandra told The Post.

“Wall and Bannister will be install [with] granite ball cap,” the couple’s City Wide receipt reads, above a $28,000 cost tally marked “Paid in Full.”

But despite the receipt — viewed by The Post — the company is denying any responsibility for the collapse, the Netchandras said Saturday.

“I only deal with one guy. He came to take the money. He gave me the receipt,” the wife said of the company’s owner of record, Nadeem Mughal.

“He drove a white van that said ‘City Wide,’ with the material. He was the boss. He told the other two workers what to do,” the wife said.

“We didn’t do business with any other company,” added the husband.

But when the couple confronted Mughal by text and phone soon after the tragedy, he denied having installed the railing, they said.

Instead, he pointed to a second company, Shah Group Enterprises of Jamaica, Queens, owned by Manjinder Singh.

That’s the company that obtained a city Department of Buildings permit for the work.

“At this point they are just blaming each other,” Radhica complained.

“I’m angry, of course,” added her husband.

“I’ve been angry since it happened. I can’t stop thinking about the little girl,” he said.