Jacob Kamm House, French Second Empire mansion in Goose Hollow, Portland, United States.

Jacob Kamm House is a three-story French Second Empire mansion at 1425 SW 20th Avenue in Goose Hollow, built in 1871. Its flush horizontal wooden siding and wooden quoins imitate stone, and the scalloped wooden shingles on the mansard roof are cut to look like slate. The front facade has two wings on different planes: a three-bayed right wing with a canopied entrance and a left wing with a polygonal bay and a double segmental-arched window.

The house was constructed in 1871 at the corner of SW 14th and Main Street before being relocated to its current location in 1950. The move became necessary to clear land for the construction of Lincoln High School.

From 1955 Eric Ladd ran the Kamm House Restaurant here for four years; it opened with an Oregon Historical Society benefit dinner at $100 a plate for 80 patrons, and guests arrived in 1880s dress, some by horse and buggy. Ladd did the baking himself after the first two years, and the restaurant closed after four.

The house stands at 1425 SW 20th Avenue on a 10,000-square-foot lot, about half a mile from its original SW 14th and Main site. It is a private building, so visitors see the exterior from the street; the scalloped wooden shingles of the mansard roof and the canopied entrance on the right wing are the details to look for.

The original heating relied on a ship boiler to warm the interior spaces. The cooling system used an early form of air circulation that drew on cooler basement temperatures to regulate the house naturally.