For $2.595 million, you can have CK's Pasadena bungalow. 109 years old in the Arroyo area, 1/4 acre, 4 bedrooms, 3.5 bathrooms,  2-bed/1-bath guesthouse, terraced gardens, yadda yadda. More info and pics here.

I spent some time squinting at the book spines in his study.

Thanks to Mark!

[EDIT: I remembered Charlie and his wife had a Pasadena house up for sale a few years ago, too, so I checked and it was this same house, back in 2011.]