The 23-year-old musician is said to be too upset to return to the 1million pound house in Wrotham, Kent, reported Daily Mirror.
"He has confessed to friends he wants to put it on the market once police have finished investigating the April 7 death of her," a source said.
On April 21, Cohen will attend Peaches' private funeral alongside Bob Geldof, 62, and sisters Fifi-Trixibelle, 31, Pixie, 24, and Tiger-Lily, 17, and close friends.
The invitation-only service is at St Mary Magdalene and St Lawrence church in Davington, Kent, where she and Thomas married in August 2012.