Officers were called to the address in Tonteg, Pencoed, on Saturday afternoon.
The body of 67-year-old Rita Stephens was found and the man was arrested and taken to Queens Road police station in Bridgend.
He has also been charged with making threats to kill and will appear Bridgend Magistrates' Court on Monday.
Det Chf Insp Kath Pritchard of South Wales Police said: "This incident has brought shock and sadness to the local community in Pencoed who I would like to thank for their support since this tragic incident."
A 43-year-old man has been charged with murder after a woman's body was found at a house in Bridgend county.