ABOUT TSA
THERE’S NO SUBSTITUTE FOR SEVEN DECADES OF EXPERIENCE.
Founded in 1955 by architect Thomas Sebold, the firm’s focus gradually shifted from design to construction. As a trusted partner to world renowned architects such as Minoru Yamasaki, and Hugh Newell Jacobson, Thomas quickly established the firm’s position in the custom home market. Commitment to quality and craftsmanship has guided TSA to preeminent position in the Michigan building industry. TSA is proud of the status we have achieved through our past accomplishments. However, we know we must continue to work hard to ensure future success.
Although we are often regarded as strictly a high-end builder, we pride ourselves on our quality and affordability. No matter the size or scope of your building project, we view all customers with equal importance. We know the significance of managing your budget, timely communication, and punctual completion of your project. Our customers’ happiness is another key to the continued success of TSA. Today, Glenn Kunnath (owner), along with a dedicated group of construction professionals, have taken the company to a new level. Both Glenn and the talented TSA Project Managers are involved in each phase of the building process from design to construction through completion. Personal hands-on involvement ensures a fiscally, as well as structurally sound build.
TSA shows strength in its diversity. While we are best known for our custom residential work, remodeling, historic restoration, commercial construction, and TSA Home Care are equally crucial elements to our ongoing business. Diversity allows TSA to bring together the best trades people to practice time honored methods of craftsmanship and pursue the latest advances in building technology.
Our highly skilled team of carpenters and tradesmen routinely custom fabricate cabinets and furniture to complement residential and commercial projects. Your creative ideas and dreams can be turned into reality with our skilled craftsmanship, knowledge, and experience.
1955
TSA has been in business as a family-run company since 1955. Thomas Sebold—founder of the company and known as “TS” to friends and family—became involved in the building industry initially as an architect. He began his career in Detroit as a Junior Draftsman at the prestigious Smith, Hinchman & Grylls, known today as SmithGroup. Tom quickly acquired the title of “Job Captain” and was in charge of overseeing drawings and specs for his team. He also had the opportunity to work for Victor Gruen & Associates on the design and construction of the Northland Shopping Mall—the first shopping center of its kind— and for Ralph Calder on the construction of Michigan Technological University.
Tom eventually shifted his efforts into construction to become more involved with the building process. After a number of partnerships he formed Thomas Sebold & Associates in 1979 with his sons, John and Dan, to focus on the Metro Detroit residential market.
1972
Yamasaki Residence
“The purpose of architecture is to create an atmosphere in which man can live, work and enjoy”
—Minoru Yamasaki, architect of the original World Trade Center.
World-renowned architect Minoru Yamasaki’s simple yet powerful philosophy is reflected throughout his own Bloomfield Hills home, designed by the architect himself and built by Thomas Sebold & Associates in the early 1970s.
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1989
Kirk In The Hills Residence
”I wanted to take maximum advantage of the views and capture the Michigan light”
—Hugh Newell Jacobson, quoted in anArchitectural Digest articlefeaturing the home in 1990.
Hugh Newell Jacobson designed this Bloomfield Hills residence in Kirk in The Hills neighborhood. Inspired by Neoclassical design with careful attention paid to proportion, this home was built on a narrow site between two lakes which presented an initial challenge. The solution was to create the illusion of a larger site through the placement and design of the entrance drive. More than 125 matching Bradford pear trees lead visitors through a classic allee to the home’s dramatic entryway.
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1994
TSA begins work in Bay Harbor
Thomas Sebold & Associates expanded their reach when the company was asked to work on a new development in Northern Michigan—Bay Harbor. A unique residential community situated on Little Traverse Bay, the development was built upon an old quarry, offering residents access to a world-class golf course, yacht club and equestrian facilities. TSA is proud to have built several custom homes and condominiums within the community as well as the Bay Harbor Yacht Club.
1999
Yamasaki Renovation
The new owners of the Yamasaki’s residence returned to TSA for a modern renovation of the 1972 home. Owner and interior designer Lynda Charfoos used her knowledge and experience of 20th century classic design to update the home while preserving Yamasaki’s original intent for the space.
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2013
TSA Today
Today, Thomas’ son Dan Sebold runs the company with his partner Glenn Kunnath. Collectively, the TSA team builds approximately 20 high-end homes per year ranging in size from 5,000 to 35,000 square feet. Custom homes are TSA’s specialty and make up the building block of its foundation.
TSA’s expertise also encompasses the construction of office buildings, retail centers, country clubs, and high-end condominium developments.
2015
Dan Sebold decides to retire after 30+ years of leadership and dedication to TSA. Dan will be always remembered for his unwillingness to compromise quality. Dan is enjoying retirement spending time with his family and friends. He splits his time between Michigan and Florida.
2016
Glenn and Dana Kunnath become full owners of TSA and continue TSA’s reputation as the leaders in the distinctive luxury home market. The commitment to uncompromised quality and integrity continues as TSA’s main focus and is ingrained in all TSA team members. We are committed to make the customer experience unparalleled in the industry.
2017
TSA has the distinct honor of becoming the General Contractor of choice for the Alden Development Group Brookside Condominium Project in downtown Birmingham, MI. TSA was contracted to do the lobby, fitness and social rooms, the ADG office, as well as all the common areas. We are thrilled to also be the builder of choice for the 30 condo units within the development.
2024
TSA’s reputation for quality and attention to detail continues to be unmatched. Throughout the growth of the company and ever changing industry, the mission remains the same…..Quality! The reputation of TSA has prevailed and will continue to be at the forefront of what drives the company. Quality, integrity and the authentic commitment to our clients is the TSA Way!!
A Legacy of Leadership Honoring Dan Sebold
Every enduring company is shaped by individuals whose vision, integrity, and leadership leave a lasting mark on those who follow. At Thomas Sebold & Associates, Dan Sebold is one of those individuals.
For decades, Dan dedicated himself to preserving and strengthening the values upon which Thomas Sebold & Associates was founded. Building upon the vision established by his father, Thomas Sebold, he guided the company with humility, professionalism, and an unwavering commitment to excellence. His leadership helped define not only the homes we built, but the reputation we earned throughout Michigan and beyond.
Dan believed that exceptional construction was about far more than materials and methods—it was about trust. He understood that every project represented a family’s dream, an architect’s vision, and a commitment that deserved the highest level of craftsmanship and care. That philosophy became the cornerstone of his leadership and earned the confidence of clients, architects, and trade partners alike.
Throughout his career, Dan championed the principles that continue to define Thomas Sebold & Associates: uncompromising quality, honest communication, personal accountability, and meticulous attention to detail. He believed that every project, regardless of size or complexity, deserved the same level of dedication and professionalism. Under his stewardship, the company became known for its ability to execute architecturally significant custom homes, luxury renovations, historic restorations, and distinctive commercial projects with exceptional precision and craftsmanship.
Beyond the projects themselves, Dan’s greatest contribution was the culture he fostered. He led by example, treating employees, craftsmen, clients, and industry partners with respect and fairness. He believed that a company’s reputation was earned every day through integrity, consistency, and a genuine commitment to doing what was right. Those values became deeply rooted within Thomas Sebold & Associates and remain an enduring part of the company’s identity.
When Dan retired in 2015, he concluded a remarkable chapter in the history of Thomas Sebold & Associates. His retirement marked the culmination of a career dedicated to excellence, service, and the pursuit of quality without compromise. While buildings stand as a testament to his work, his true legacy is found in the standards he established, the people he mentored, and the countless relationships he built over the course of his career.
Dan Sebold’s influence continues to be reflected in every home crafted with care, every detail executed with precision, and every client relationship built on honesty and trust. His commitment to excellence helped shape Thomas Sebold & Associates into the respected company it is today, and his legacy will remain an enduring part of its history for generations to come.
With sincere gratitude, we honor Dan Sebold for his extraordinary leadership, unwavering integrity, and lifelong dedication to the values that continue to define Thomas Sebold & Associates. His legacy lives on in every project, every relationship, and every standard of excellence that bears the TSA name.