The charges follow the finding of two bodies under the house in the suburb of Wainoni last weekend.
The 33-year-old home owner has already been charged with the murder of his 35-year-old wife. Neither can be named due to suppression orders.
Today is expected to be charged over the murder of the second body found -- 28-year-old Tisha Lowry, who lived nearby and went missing almost a year ago.
Police yesterday said the bodies had been released to their families.
Detective Inspector Tom Fitzgerald, who is heading the inquiry, said a final search of the Wainoni Rd property would be held today.
Christchurch Mayor Bob Parker yesterday vowed to push ahead with his plan to buy the house where the bodies were found last week, despite the possibility it may involve the murder accused receiving ratepayers' money, The Press reported today.
Mr Parker has proposes that the city council buy the two semi-detached houses. The bodies of two women were found buried under the floor at one house.
While his proposal has won some community support, Mr Parker said it was a "complex issue".
"Having proposed the idea, we need to work through how it might work. I am not going to give up on this. It is a complex issue, but it is very important."
The property could be used for a memorial park or a community facility, he said.
Yesterday Maori Party Tai Tonga MP Rahui Katene criticised police for the way they treated the family living next door to the "murder house".
"I just don't think it's good enough that the family living in the other half of the semi-detached house in Christchurch had to learn through the media that there was a murder investigation going on next door."
Police were looking for bodies just through the wall from their children's bedroom, Ms Katene said.
"This family has been severely traumatised by what has happened right next door to them. Their children -- and the parents too -- don't want to go back there again. And I'm appalled that the police have suggested that they can move back in again."
Ms Katene said she would take the matter up with senior police in Wellington.
She applauded efforts by Mr Parker to get council to consider buying the house.
