Summit Avenue house from Glensheen Mansion architect is listed at $1.25M

The 8,200-square-foot St. Paul property has been a single residence, shared living space and event center in its nearly 150-year history.

The Minnesota Star Tribune
December 26, 2025 at 4:00PM
The front room of the Addison Foster house in St. Paul, photographed Dec. 17. The large brick Romanesque-style home on Summit Avenue in St. Paul was designed by Clarence Johnston for Addison and Martha Foster and built in 1883. (Jeff Wheeler/The Minnesota Star Tribune)

From the sidewalk, the hulking stone-and-brick mansion at 490 Summit Av. blends in with its grand neighbors — ornate, imposing and unmistakably old-money St. Paul.

Inside, its sheer scale and layered history show in the dark wood paneling and original wall sconces. Even the front door, which only opens from the inside, dates to a time when not personally greeting guests was unthinkable.

The Summit Avenue home has served many roles in nearly 150 years: elite residence, wedding and event venue, even shared living space.

A single resident — Michael O’Sullivan, who purchased the house in 2018 — now occupies the 8,200-square-foot property, which is up for sale at $1.25 million.

“It’s funny because everyone asks how I use this much space, but I work in the living room in the morning, and then in the evening, I watch TV and sit by the fire,” he said. “It’s weird how you get used to big spaces.”

Michael O’Sullivan bought the St. Paul home in 2018. He previously lived in Dublin in a 700-square-foot apartment, which he said felt large before he bought the Summit Avenue residence. (Jeff Wheeler/The Minnesota Star Tribune)

When O’Sullivan bought the house, much of the original craftsmanship hid beneath red carpeting and aging wallpaper.

He quickly began restorations, starting with largely unseen work, like stabilizing the foundation, chimneys and roof. Halfway through the process, he listed the home for sale at $1.35 million.

O’Sullivan later pulled the home from the market to focus on aesthetic preservation, including restoring the floor’s hand-crafted butterfly joints and other patterns made from multiple wood species.

“A lot of the money wasn’t the fun stuff,” he said.

Built in 1883, the six-bedroom, five-bathroom home was Minnesota architect Clarence H. Johnston’s first residential commission, O’Sullivan said.

Neighborhood associations sued the owners of the 490 Summit Av. property and the city of St. Paul in 1980, requesting the house no longer be used for wedding receptions and parties because it violated a 1916 city ordinance. (James Stanley/The Minnesota Star Tribune)

Johnston would go on to shape the state’s built landscape, designing Duluth’s Glensheen Mansion, the Minnesota State Fair’s cattle barn and the University of Minnesota’s Northrop auditorium and Williams Arena, among many other buldings.

Addison and Martha Foster commissioned the Romanesque-style house, with its Queen Anne influences. Its Romanesque architecture has fortresslike structures, thick walls, small windows and prominent round arches.

Addison’s business partner, Chauncey Griggs, hired Johnston to design a similar mansion next door for Griggs and his wife, Martha. The men worked in the lumber and coal industries.

Carriage houses once physically connected the two homes, reflecting the couples’ close relationship, O’Sullivan said. The women hosted at each other’s homes frequent joint events focused on civic engagement and other social causes.

Both families lived on Summit Avenue only briefly before moving to Washington state, where Foster and Griggs founded the St. Paul & Tacoma Lumber Co.

Inside the stately former Foster residence, the main floor includes two large living areas, both with gas fireplaces. There’s also a spacious dining room furnished with pieces passed down from owner to owner and a recently remodeled kitchen.

The second floor holds five bedrooms, though one would have served as a dressing room off the primary bedroom. A Jack-and-Jill bathroom connects two of the rooms.

One of the home’s more curious features sits off the third-floor billiards room: a marble shower installed at a time when indoor showers were still a novelty.

“They didn’t think women could be trusted with the technology; it was too stimulating,” O’Sullivan said. “So it was put where only men could use it.”

The renovated kitchen on the main floor of the Addison Foster house in St. Paul. (Jeff Wheeler/The Minnesota Star Tribune)

In-home staff historically lived on the third floor, which has also functioned as an apartment in recent years. The level includes a partial kitchen in the billiards room — which doubled as a ballroom during the home’s years as an event center — and another kitchen in the converted apartment area.

The now-defunct Saint Paul Globe newspaper included references to the home, including an 1886 ad Martha Foster placed for a “first-class cook” and an article detailing an 1888 party celebrating the Fosters’ son’s return from Yale.

“Over 250 young ladies and gentlemen danced to Seibert’s sweetest strains. Mrs. Foster’s home was illuminated, and flowers, smilax and evergreens made a pretty effect in the four parlors which were all thrown wide open,” the article read.

The bathroom off the primary bedroom. (Jeff Wheeler/The Minnesota Star Tribune)

Much of the home’s history is from word of mouth and scattered clues. Students working on a book about Summit Avenue apparently stole the building permit filing card, meaning the permits still exist but are difficult to locate in city records.

The original blueprints, which reveal slight differences from the final layout, remain and now hang on a wall in a second staircase at the back of the house that staff would have used.

Behind the house sits a 4,000-square-foot carriage house, built before the main residence and now used for storage and garage space.

While the property’s size might narrow its pool of potential buyers, high-end listings continue to move in Minnesota. Pending sales of houses priced from $190,000 to $350,000 were down about 4% in November, while sales of houses priced at more than $1 million increased more than 17%.

A second-floor bedroom. (Jeff Wheeler/The Minnesota Star Tribune)

Many consider Summit Avenue as America’s best-preserved example of a grand Victorian street, lined with former residences of some of St. Paul’s wealthiest figures, according to the city’s preservation guidelines.

The street has been a topic of political discussion in recent years because of a proposed bicycle lane that would dig up the 4-mile stretch, install new sewers and water mains and move a bike lane up to the level of the sidewalk, similar to bike lanes on Hennepin Avenue in Minneapolis.

What has made owning this outsized home so rewarding, O’Sullivan said, is Summit Avenue itself — a tight-knit enclave where neighbors gather for monthly soup nights and holiday parties.

“It feels like a little family,” he said. “When I moved here, there were no kids in the neighborhood, and now we have several houses with kids and all different kinds of people.”

Exterior of the nearly 150-year-old brick Romanesque-style home at 490 summit Av. in St. Paul. (Jeff Wheeler/The Minnesota Star Tribune)

Janet Piontek of Coldwell Banker Realty (612-386-7878, janet@janetpiontek.com) has the $1.25 million listing.

about the writer

about the writer

Carson Hartzog

Retail reporter

Carson Hartzog is a business reporter covering Target, Best Buy and the various malls.

See Moreicon

More from Home Gazing

See More
card image
Jeff Wheeler/The Minnesota Star Tribune

The 8,200-square-foot St. Paul property has been a single residence, shared living space and event center in its nearly 150-year history.

card image
card image