Arson squad are investigating the blaze.
Authorities said fire ripped through a home in Commercial Road in Forrestdale around 3am on Saturday.
Sixteen firefighters attended the scene to extinguish the blaze.
One man was found deceased at the scene, it's believed he was inside the structure during the time of the blaze.
Arson squad will investigate the cause of the fire today.
Wanted woman known to frequent Mandurah, Rockingham, West Pinjarra areas
Detectives are looking for a 40-year-old woman who they believe may be able to assist them with an ongoing investigation.
Waikiki Beach Hotel to go ahead after liquor licence approved
The proposed Waikiki Beach Hotel is going ahead after its liquor licence was reinstated.
Man found critically injured outside Baldivis pub
A 35-year-old man is fighting for life in hospital after being assaulted in Baldivis.
Dawesville man charged with 38 child sex offences
A Dawesville man has been charged with a series of alleged child sex offences following an extensive investigation by Mandurah Detectives.
Mandurah land owners reminded to prepare properties for upcoming fire season
The City of Mandurah is reminding local landowners to prepare their properties for the upcoming fire season.
Winning $2.5 million Lotto ticket sold in Bertram
One lucky local is $2.5 million richer after taking out a share in Saturday's Lotto Superdraw.
Shark advice issued for White Hills Beach
A shark advice remains for a popular four-wheel-drive beach south of Mandurah after a whale carcass washed ashore.
Mayor reassures community after 13 trees removed from old King Carnival site
New Mandurah Mayor Amber Kearns has taken to social media after 13 trees were chopped down at the old King Carnival site on the Western Foreshore.
State Government invests $5 million to help restore Peel-Harvey Estuary
The State Government is fulfilling an election commitment, investing $5 million to help restore the Peel-Harvey Estuary.