I've driven past the property a few times (though it was as bit of a detour; it sits in a cul-de-sac off Woodrow Wilson Drive in the Hollywood Hills).  What impressed me is that the house is within a fairly extensive gated compound.  It seems to me that the house, itself, has undergone extensive remodeling, which is hardly surprising.

I was never inside the house,and never even laid eyes on the block until it made the local Los Angeles TV news when the by-then incapacitated Rózsa's nurse was murdered in the street by her boyfriend in the late 1980's or early '90s:

From the contemporaneous Los Angeles Times:

"[Lucille Marie Warren] had been working at the home in the Montcalm cul-de-sac at least two months, police said. Officials of a Van Nuys-based registry of nurses, through which police said Warren was referred to jobs, declined to comment.

When Warren got out and walked toward the front of the car, the man stood up and pulled a handgun out of his clothing. Police said they do not know whether the pair spoke before the man fired several times at Warren."

Of course, the best story concerns how an uninvited and unwelcome bulldozer ended up in Rózsa's swimming pool, as related by Andre Previn in his memoir, No Minor Chords.