The double set of terrazzo stairs connecting the original and new sections gleamed in the warm light. Speckles in an exterior wall glistened.

This year’s Pasadena Showcase House of Design, the 1933 Stewart House, needs more than one tour ticket date to take in all the modern design ideas and vendors.

Searching for mid-century modern architecture in the Greater Boston Area typically leads buyers to well-known modernist enclaves in Lexington or Lincoln but even there, it’s still a treasure hunt.