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Seth Peterson Cottage

Seth Peterson Cottage in Fall
Photo Credit: Yvonne Carpenter-Ross, Northern Sky Designs

One of the very last Frank Lloyd Wright-designed structures ever to be built, the Seth Peterson cottage was another example of Wright’s Usonian homes, commissioned in 1958 by Seth Peterson while Wright was finishing work on the Solomon R. Guggenheim Museum in New York — a project that occupied some sixteen years of Wright’s life. Mr. Peterson however, never spent a night in the cottage as he presumably committed suicide before the place was finished. Whether or not Wright himself ever visited the cottage is questionable; on April 9th, 1959 at the age of 91, Frank Lloyd Wright passed away.

Discovery and Rehabilitation

For the next twenty-some years, the cottage was left to the ravages of Mother Nature; time, neglect and the elements nearly destroyed it. But, as luck would have it, a woman by the name of Audrey Laatsch was canoeing on Mirror Lake one day when she somehow spotted the ruins of the cottage up on the hill. Research indicated that the crumbled cottage was indeed a Frank Lloyd Wright design.

Windows from interior

Rehabilitation of the Peterson cottage was not easy, nor was it cheap. But those volunteers dedicated to the preservation of Frank Lloyd Wright-designed structures are resolute and determined; many of those who were responsible for the restoration of the Peterson cottage were local residents, and heading the group was none other than Laatsch herself. Their efforts, starting with the founding of the Seth Peterson Cottage Conservancy (a non-profit organization) in 1989 resulted in a $300,000 project that took three years to complete and included elements (such as a radiantly heated floor) from Wright’s original design that apparently had never been built. The work was finished and the cottage became available for guest lodging in June of 1992, the 125th anniversary of Wright’s birth.

Important to note is that the Seth Peterson cottage is actually a rehabilitation (“repair” – perhaps with different materials) and not a restoration (“return to original condition”) — the difference being that although the design is the original, some aspects, such as the thermal-pane windows created especially for the cottage by Pella, are not. Personally, I think it is splitting hairs, but I wouldn’t want to broach that subject with a Wright aficionado…

A Weekend in the Woods

The cottage is really only two rooms (not counting the bathroom) but actually seems quite large; the locally-obtained red sandstone in the walls and on the floor, along with ambient and electric lighting create a comfortable and welcoming warmth. A small, open kitchen is just to the right upon entering and is equipped with a sink, an electric stove and refrigerator. Straight ahead is the main room: a gorgeous view into the oak woods is available out the south-facing, floor-to-ceiling windows and a monstrous fireplace can provide a roaring fire when the mood or the weather demands. A porch on the west side of the cottage provides a perfect place to enjoy a view of the sun as it sets over Mirror Lake.

Stay The Night

The cottage is perfect for a special getaway and it is available for overnight or for longer stays. Best for one or two guests, the cottage will accommodate up to four guests; it can fairly comfortably hold twenty guests (There were about twenty-five of us in the cottage for the Fall Color Boat Tour reception) for special events or perhaps a dozen for special meetings.

Fall colors Mirror Lake

Perhaps one of my favorite parts of our tour was the actual “Fall Color Boat Tour” portion of the day. Three pontoon boats awaited us at the small dock at the end of the path leading down the hill from the cottage. We had the good fortune to have drawn Waldo Peterson (no relation to Seth Peterson) as our guide. Easing back from the dock and heading down the narrow portion of the lake toward the State Park boat launch, Waldo began to describe how Mirror Lake had gotten its start — he had actually grown up here as a boy and had known the area when the land around Mirror Lake was privately owned. In 1925 a concrete dam replaced a wooden one constructed in the mid 19th century, the purpose of which was to power a watermill to grind local grain into flour.

Fall Colors

He also told us about the creation of the State Park in 1962, pointed out special places of interest — like the cabin where many of the scenes from Public Enemies were filmed, Ishnala Supper Club and the “Devil’s Post Office” — and reminisced about some of the colorful history of the lake and its residents. Mostly he just smiled as he piloted us along the stretches of the 137-acre lake that he loved. The fall colors from the maples were just beginning to show themselves and the serenity was all-encompassing as the sun was setting on the placid waters of Mirror Lake; it was easy to understand how the lake got its name.

The Del Bar

The chill from the boat ride was quickly replaced by the warmth from a blazing fire that awaited us back at the cottage, along with hot cider, sandwiches, and conversation. The tour had come to an end, but we had one final place to check out before our day could be over. We stopped briefly at the Hilton Garden Inn for a change of clothes and headed to the Del Bar Restaurant… conveniently right next door. Designed by James Dresser, a protégé of Frank Lloyd Wright, it was a place at which we had always wanted to stop. The Master Architect’s influence is definitely visible — in the lines of the structure, in the design if the doors and in the interior as well.


It was a fitting way to end the day, just sipping a cocktail and munching on some delicious smoked salmon. We were trying to decide when the best time would be to plan a trip to stay at “The Seth” as Waldo had referred to the Peterson cottage. And planning is certainly necessary; the place is booked solid many months in advance… Even if you don’t have a special event to celebrate, it’s never too early to start planning a reservation at one of the very few Wright buildings in which you can actually stay — and while you’re there, take as many pictures as you like.

Tour the Seth Peterson Cottage

Tours are available the second Sunday of each month from 1:00 to 3:30 pm. Check the Seth Peterson Conservancy website for additional information.

Rent the Seth Peterson Cottage

The cottage is available to rent from the Conservancy. There is 2-night minimum stay. Reservations are often booked well over a year in advance so if you’re thinking of staying here, be prepared to plan ahead! You can check availability here.


E9982 Fern Dell Road, Lake Delton, WI

Resources & Links

Seth Peterson Conservancy
Frank Lloyd Wright’s Seth Peterson Cottage: Rescuing a Lost Masterwork
The Wright State: Frank Lloyd Wright in Wisconsin


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About Me

Yvonne Carpenter-Ross

FLW Enthusiast & Webmaster

Architecture and home design have always fascinated me. As a young girl I enjoyed drawing floor plans, rearranging my parent’s furniture and playing with Lincoln Logs and Legos.  My passion has always been the architecture of Frank Lloyd Wright. Since I have been old enough to drive a car, I have visited Frank Lloyd Wright homes in the Chicagoland area and attended the Wright Plus house walks. Now, as co-owners of Northern Sky Designs, my husband & I are able to combine our website design skills and FLW travels to bring you this website! Enjoy!

Yvonne Carpenter-Ross