Heath Ledger's estate has sold the late Australian actor's Hollywood Hills home, nicknamed The Treehouse, for $US2.5 million ($A3 million).

Ledger's trustees Layne David Dicker and Jeff Gillman arranged the sale to Miami-based company, Eighty Ten Properties LLC.

According to recently released Los Angeles County public records, the sale was completed in May.

Ledger bought the unique two bedroom, two bathroom post-and-beam home in 2005 for $US2.3 million from US TV talkshow host and comedienne Ellen DeGeneres.

The 28-year-old Perth-born actor and star of 2008's box office hit, The Dark Knight, died in New York in January from an accidental prescription drug overdose.

It is unknown if Ledger's daughter, Matilda, who turns three next month, or his former fiancee, Michelle Williams, would share in the sale's proceeds.

Ledger filed his will in Australia in 2003, before he met Williams on the set of their 2005 film Brokeback Mountain and he did not update it to include the actress or Matilda.

The bulk of his estate was placed in a trust for his parents, Kim and Sally, and his three sisters.