Authorities at California's Department of Public Health are inspecting the Hollywood Hills mansion the pair shared before tragically dying within five months of each other.
The Clueless star's mother Sharon, who also lived at the property, is believed to have refused the Los Angeles County Coroner entrance to the house to investigate mould while looking into the actress' death in December (09).
But Sharon has now agreed to a survey by Public Health officers following Monjack's shock passing in May (10), reports TMZ.com.
The couple, who married in 2007, both had pneumonia and anaemia listed as causes of death in their respective coroner's reports. It is alleged the mould could have affected their respiratory health.