Onion House, Residential structure in Kailua-Kona, Hawaii, US

The Onion House is a residential property in Kailua-Kona featuring two dome-shaped main structures connected by stained glass walls and surrounded by a large swimming pool. The spaces are lined with lava rock and topped with translucent roof panels that allow daylight to fill the interior.

Elizabeth McCormick von Beck, niece of McCormick & Company founder Willoughby M. McCormick, commissioned Kellogg when he was in his mid-twenties; no contractor would take the job, so Kellogg moved to Hawaii and built it himself in 1962-1963, his third house. James Hubbell helped with construction, and Beth McCormick, the original owner's niece, bought the home in 1984 and renovated it over 34 years before selling it in 2017.

The name comes from the arched roof panels, which resemble an onion or shell; the lava rock walls echo the heiau, or ancient Hawaiian temples, found along the Kona coast. The house has been open to the public as a vacation rental since 2000, when Beth McCormick began sharing it with guests.

The house stands at 77-6411 Nalani St in Kailua-Kona, on the slope of Mount Hualalai, where trade winds are buffered and temperatures stay between 70 and 80 degrees Fahrenheit. The two main structures are joined by a 70-foot pool that wraps around them, and the living areas open to the outdoors through screen and stained glass rather than solid walls. Since 2000 the property has been let to overnight guests.

The interior features 29 stained glass windows crafted by artist James Hubbell specifically for this location. These windows fill the rooms with colored light patterns that shift throughout the day.