Perth real estate agents may be rethinking their open home procedures after prospective renters came across a dead man while viewing a property on Monday.

REIWA president David Airey told Radio 6PR that while he understood the real estate agent holding the viewing on Monday did not breach the Residential Tenancies Act, the incident could prompt changes.

It is understood that despite a bad smell, people were let into the West Perth unit to view it and one of them came across the dead body and told the real estate agent, who then closed the viewing early.

"It is difficult to know what went on here, without knowing all of the circumstances," Mr Airey said.

"According to the story, there was a smell, which maybe would've been a giveaway.