Jacob Kamm House
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Portland Historic Landmark
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![]() The Kamm House in 2010.
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Location | 1425 SW 20th Avenue Portland, Oregon |
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Coordinates | 45°31′04″N 122°41′42″W / 45.517646°N 122.695029°WCoordinates: 45°31′04″N 122°41′42″W / 45.517646°N 122.695029°W |
Area | 0.3 acres (0.12 ha) |
Built | 1871 |
Architect | Justus F. Krumbein |
Architectural style | French Second Empire |
NRHP Reference # | 74001708 |
Added to NRHP | November 5, 1974 |
The Jacob Kamm House, also called the Jacob Kamm Mansion, is a French Second Empire style mansion in Portland, Oregon, built in 1871. It was moved from its original location on SW 14th and Main to its current location in Goose Hollow in 1950 to make room for Lincoln High School's campus. It was purchased by preservationist Eric Ladd for $1,000 at auction and moved to its present location, along with two other houses Ladd was interested in preserving, at SW 20th and Jefferson, which was called "the colony."
The house, completed in 1871, was designed by architect Justus F. Krumbein, who was also involved in the design of the Oregon State Capitol. The construction was overseen by L. Therkelsen, and cost $80,000. While the French Second Empire style building suggests a stone or stucco exterior, it is actually built with flush horizontal siding and wooden quoins. The wooden shingles on the Mansard roof are scalloped to appear like slate. The building is approximately 8,671 square feet (805.6 m2) in three stories plus a basement, and contains six bathrooms. It was sited on Kamm's Goose Hollow 14th and Main 11 acres (4.5 ha) property. The original address to the house was 488 Main Street; the city's streets were renamed in the early 1930s and the location became Southwest 14th and Main.
Notable early features were central heating, using steam from a ship's boiler, and a rudimentary system of air conditioning, using cool air from the basement directed through the house through air pipes and cast iron vents. The air conditioning system was intact, but nonfunctional, as recently as 1974. In the 1970s, the house was remembered by Eric Ladd as being "well back from 14th Avenue", with a large magnolia, a flowering cherry tree, fruit trees, and a "century old black walnut".