Fire crews were called to a property in Smith Crescent, Rastrick, Brighouse, at 19.30 hrs on December 18.
Fire engines from Rastrick and Huddersfield attended. A fire at the property was confirmed out on arrival of crews.
The bodies of a man and woman were found inside the property.
A fire investigation officer attended the scene today to look into the circumstances around the fire.
West Yorkshire Fire and Rescue Service is working alongside West Yorkshire Police as enquiries continue.
At this time, the deaths are being treated as unexplained.