Minnesota's 'Mushroom House' aka 'Flintstone House' Has Been Sold

Known in Duluth, Minnesota, for more than fifty years as the "Mushroom House" or "Flintstone House", this architecturally iconic triple-dome home at 1401 Mississippi Ave in Duluth's Kenwood neighborhood recently hit the market for the first time since 2021, listed at $369,999.

Built in 1970 by Minnesota developer George Hovland and designed by architect Stan Nord Connolly using an innovative foam-shell construction method, this is not a home for someone looking for ordinary.

The home ultimately sold for more than its original asking price. Take another look inside one of the most distinctive properties ever listed in Minnesota, or anywhere for that matter, and see what the new owner paid to live there.

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SOLD: Minnesota's 'Mushroom House' aka 'Flintstone House' Has A New Owner

Welcome to 1401 Mississippi Ave — known around Duluth for more than fifty years as "The Mushroom House" or "The Flinstone House."

The 5-bedroom, 3-bath house was built in 1970 using an innovative foam-shell construction method. The home's triple-dome design creates curved walls, soaring dome ceilings, and spaces that feel more sculpted than built.

The main level of this 2,800 square foot home opens into a sunken living room with a built-in sofa and a dramatic wall of seven-foot patio doors leading to a wraparound deck overlooking the trees.

The arched kitchen carries the home's organic geometry throughout, with a breakfast bar that feels as much like it belongs in an art installation as in a home.

The primary bedroom offers vaulted ceilings and epoxy flooring. A second bedroom and three-quarter bath complete the main floor.

Head downstairs, and the walk-out lower level opens into a spacious great room with beamed ceilings, a wood-burning fireplace, and patio access to the wooded backyard. Three additional bedrooms, a full bath, a half bath, and a laundry room create flexibility for whatever the next owner needs.

However, what makes this home truly remarkable is not just what it looks like; it is what has been done to protect it.

In 2021, new epoxy flooring was installed throughout the primary bedroom and lower-level family room, new carpet went into the lower-level bedrooms and upper office, the sewer lateral was replaced, and a full-house dehumidifier and whole-home ozone air scrubber were added.

In 2022, the exterior received a professional repaint with UV-resistant paint, and all skylights were sealed.

In 2024, all 16 windows were replaced. The home sits on a private, wooded 0.60-acre lot in Kenwood, within walking distance to the University of Minnesota Duluth and the College of St. Scholastica, with a two-stall attached garage with loft storage rounding out the package.

The home went back on the market in Duluth in May 2026 for $369,999. It ultimately sold for more than that asking price. You can see the closing price in the final picture.

Gallery Credit: Alicia Lokke with The Lokke Group at Messina & Associates Real Estate

SEE NOW: Click Here To See Minnesota's Mushroom House, aka ‘Flintstone House’ Photo Gallery, If Unable To See It In The Story

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Source: SOLD: Minnesota’s ‘Mushroom House’ aka ‘Flintstone House’ Has A New Owner