Minnesota's 'Mushroom House' aka 'Flintstone House' Is For Sale

Many homes throughout Minnesota have a unique look or a cool story, or both. However, it's hard to beat the combination of a home's look and story in Duluth that has been a local legend for over half a century.

Known locally 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 just 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.

Take a look inside one of the most distinctive properties ever listed in Duluth.

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1401 Mississippi Avenue - Duluth, Minnesota

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.

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

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Source: Minnesota’s ‘Mushroom House’ aka ‘Flintstone House’ Is Now For Sale