Found more information about the Card Houses on Sugar Hill.
"41 – Streetscape. Oxford Ave.
Left to right: Schafer Residence, Chamberlain Residence, New Construction, and Gibbons Residence.
Real estate agents in 1970’s through 90’s, were eager to promote Historic West Adams and used many tools at their disposal. One advertising campaign Claimed these four properties, designed by Frank M Tyler, were constructed in the theme of cards – each one being either hearts, spades, diamonds, and clubs. The problem is that it wasn’t exactly true. The houses may or may not have had these themes, but they were also common motifs of many turn-of-the-century houses. Another factor is that these houses were all built at different times, spanning from 1903 to 1907, and commissioned by different people. Also, the house at 1921 S Oxford (destroyed by fire and demolished in 1966) probably wasn’t designed by Frank M Tyler. Looking at the houses it’s hard to fathom how this legend began, but imagination is a wonderful thing"
From the same author I have been finding all my information. Very knowledgeable. I would suggest visiting his Flickr, he has info on a lot of houses.
Here is his Flickr main page Lots and lots to go through.