Peterssen/Keller Architecture is an award-winning full-service architectural firm that specializes in custom homes, lofts, cabins and boutique commercial projects. Our collaborative, client-focused design process results in unique residences that are as distinct as their owners. As residential architects and designers, we integrate sustainable design practices into every project, from small additions to LEED-certified new homes, finding solutions that merge environmental thinking with exceptional design. At Peterssen/Keller, every client is our passion, and every project is an opportunity to create a home crafted to last a generation.

Lars Peterssen, AIA, PRINCIPAL

Design works in mysterious ways. If Argentine architect Emilio Ambasz hadn’t accepted Milton Friedman’s invitation to speak at the Walker Art Center three decades ago, Lars Peterssen might be living on Bainbridge Island in Seattle, designing the next generation of computers. At the time, Lars, who graduated magna cum laude from Carleton College with a degree in physics, was working on supercomputers at Control Data. When Ambasz spoke about the integration of architecture, landscape design, and product design, his ideas resonated with Lars on a profound intellectual level. Lars recognized that architecture, like science, includes an analytical approach to problem solving, only on a grander and infinitely more beautiful scale.

Lars brings this unique perspective to each of his projects. His designs bring warmth and texture to modern design, and he specializes in bringing together the very best of styles. His distinct residences and projects can be found in New York City, Deer Valley, California, Florida, Arizona and across the Midwest.

Lars is a founding principal of Peterssen/Keller. Lars has worked at Meyer, Scherer, and Rockcastle, The Cuningham Group and he was a founding partner of Domain Architecture & Design. Lars also taught at the University of Minnesota and was awarded the Frederick Mann Award for Disciplinary Service. Lars has had extensive business holdings in Russia, including restaurants and an import/export company.

Lars is a member of the AIA, NCARB certified, and a licensed architect in New York, Minnesota and Wisconsin. Lars has a master of architecture degree from the University of Minnesota, where he was honored with the AIA Henry Adams Medal for his accomplishments.

To contact Lars directly, please call our office or reach him via email at


For Gabriel Keller, architecture is ultimately about designing an experience—intuiting how an environment should feel, and then using light, space, line, and form to create it. This experience is ultimately about designing a sense of place, and of home, that is uniquely individual to each of his clients and their richly divergent locales.

At the age of sixteen Gabriel lived abroad in Antwerp, Belgium, where he immersed himself in European culture, food, and football. After graduating with highest honors, Gabe headed east to Cornell University, one of the oldest architecture schools in the country. After spending three years in Ithaca and studying classical architecture and design in Rome, he was lured by the siren song of Soho.

Gabriel spent three memorable years in New York designing an array of extraordinary restaurants, hotels, nightclubs, and other environments for Serge Becker, the Paris-born, Swiss-Vietnamese impresario and designer of Bowery Bar, Area, M.K., and other haute hot spots. They also collaborated on sleek New York lofts and breathtaking Hamptons beach houses.

Recognizing his true passion for residential design, Gabriel returned home to Minneapolis. At Domain Architecture & Design, he found a kindred spirit in colleague Lars Peterssen and the duo designed award-winning traditional and contemporary homes, lofts, and cabins for clients in the Twin Cities and around the country. Driven by a desire to refine his own architectural style, Gabriel cofounded Peterssen/Keller Architecture in 2009. His scope is national--with homes under design in New York to California--and his work has been extensively featured in numerous national and international publications.

Today, Gabriel’s life has come full circle--just the way he designed it. With a solid footing in the local community and a thriving family, Gabriel sees Peterssen/Keller's location in Minneapolis as the perfect platform for their developing portfolio of bespoke homes located around the country.

To contact Gabriel directly, please call our office or reach him via email at


Kristine Anderson is an Associate Principal with Peterssen/Keller architecture. In this role, Kristine brings an attention to detail seen through projects she has managed and led; from a small and seamless traditional home addition, to a modern grain elevator condo remodel, or a new north shore cabin. No matter what the project entails, she strongly believes in thoroughly exploring the connection between client and environment, and how that begins to inform design.

Prior to joining Peterssen/Keller, Kristine worked as a project manager and designer at Domain Architecture & Design. While at Domain, she worked on several custom lofts, residential remodels and renovations of small and large scale, as well as new houses and cabins. During and after graduate school, Kristine worked as an architectural intern at LTD! Designs, a residential design firm, and in the design studio of Choice Wood Design/Build.

Kristine received a Master of Architecture and a B.A. from the University of Minnesota. Since 2005, Kristine has taught at the University of Minnesota's College of Design as an Adjunct Assistant Professor in the School of Architecture. Kristine is an avid amateur photographer, and has received national and regional photography awards from the American Institute of Architects.

Ryan Fish, AIA, LEED AP, Associate

Ryan Fish is an associate with Peterssen/Keller Architecture. With over 15 years of residential design experience, his projects have been widely published and have received numerous awards, including Home of the Month, RAVE Awards and AIA Minnesota Honor Awards.

Whether he’s working on a small kitchen remodel, a cabin renovation, or a new home, Ryan has a keen interest in seamlessly integrating sustainable practices into the design. He feels it is a great privilege to be entrusted by his clients to design their home, and he is passionate about making the design process a positive and collaborative experience between architect and client.

Prior to joining Peterssen/Keller Ryan worked at several award winning residential firms, including U+B Architecture & Design and Albertsson Hansen Architecture. Ryan studied architecture at both the University of Minnesota and the University of Wisconsin and is a LEED AP-certified, licensed architect in the state of Minnesota.

Ryan grew up in the cabin country of northern Wisconsin, and many of his hobbies revolve around the outdoors. He loves getting his children outside to camp, fish, and experience the Northwoods.


Andrew is an Associate with Peterssen/Keller Architecture. His growing resume of award-winning work belies his age and demonstrates the focus and design talent he brings to each of his projects. Projects he has managed are diverse, and include the renovation of an historic home on Cedar Lake, a new modern home on the shores of Lake Minnetonka, to a cabin nestled in the north woods.

Andrew completed his graduate work in architecture at the University of Minnesota, earning a M.Arch in 2008 and a M.S. in Architecture and Sustainable Design in 2009. Andrew focused his academic work on how architecture, buildings, and sites fit within the larger societal, infrastructural, and ecological systems that define our world. Professionally, Andrew is interested in how technology, both past and present, can be used to fully integrate environmental and ecological thinking into outstanding design.

Andrew came to architecture through his undergraduate work at Carleton College in Northfield, MN where, in 2005, he earned a B.A. in Studio Art. While his undergraduate work was focused on Studio Art, Andrew took courses across many subjects as well as studying in Norway, Australia and New Zealand, and at the Harvard University Graduate School of Design in Boston, feeding his natural curiosity.

When not working, Andrew continues to develop his artistic talents, with sketching, photography, and printmaking, as well as a growing interest in digital art and drawing—all while listening to copious amounts of Bob Dylan, Led Zeppelin and Pink Floyd.


Carl has 10 years of experience in residential design, including projects that have won RAVE Awards, a P/A Award, and Minnesota AIA Honor Awards. Before coming to Peterssen/Keller Architecture, he spent eight years at ALTUS Architecture + Design, where he worked on projects of virtually every scale – from garage build-outs to concepts for skyscrapers that exceeded 200 stories. He brings a critical eye for understanding the context of every project, and he cares deeply about the individual personality of each client. He believes that environmental responsibility is a fundamental starting point to any project, but that good architecture must be the end point. He sees light as the creator of space.

Carl initially studied chemical engineering and advanced biology at the University of Minnesota. In 2004, he returned to the U’s College of Design for a Master’s Degree in Architecture. During his studies, he lived and studied in Florence, Lisbon, Barcelona and Venice. His award-winning thesis, Plant Squared – An Urban Farm, looked at bringing agricultural production into urban centers.

Carl is passionate about fishing, woodworking, playing bass in a local band and traveling around the world with his wife.

Laura Cayere-King, Associate AIA

Laura joins Peterssen/Keller with over 11 years of experience in residential design on award winning projects, including AIA Minnesota Home of the Month and RAVE awards. In 2010, Laura won the Ralph Rapson Traveling Study Fellowship that sent her through Germany studying sustainable housing and Passive House design.

Laura's attention to details and collaborative design process with her clients allow her to design homes harmonized with the way that the homeowners live and play. She considers it a great honor to be given the opportunity to translate these ideas into beautiful and memorable places that reflect the individual client's identity and personality.

Prior to joining Peterssen/Keller, Laura worked at several award-winning residential firms, including TEA2 Architects, Meyer Scherer & Rockcastle Architecture, and Albertsson Hansen Architecture. Laura received her B.A. from Carroll University in Theatre Design and Art, and her Master of Architecture from the University of Minnesota. She is a visiting Adjunct Instructor for the Bachelor of Design program in the School of Architecture at the University of Minnesota and has mentored students through the College of Design Mentor Program.

In her free time, Laura enjoys spending time with her family, visiting museums, observing and considering art, and being outdoors gardening, hiking and kayaking through Minnesota’s many rivers and lakes.


Denise is the Controller/Office Administrator, handling the firm’s accounting and human resource activities. She has provided accounting support in the architecture/design field for the past six years. Prior to that her experience was in the food industry in Minneapolis with Pillsbury and in the medical industry with Medtronic in Minneapolis as well as a business unit in San Diego, a sales office in Stockholm, Sweden supporting the financial activities in all of the Scandinavian countries, and in the Netherlands assisting in the establishment of a European financial shared service center.

Denise moved to Minneapolis after graduating in Accounting from the University of North Dakota in Grand Forks. After working a number of years, she went to graduate school at the Carlson School of Management at the University of Minnesota and completed an MBA in Finance. She lives in the Minneapolis Lakes area.

Jason Briles, Associate AIA

Jason brings more than 16 years of residential design and drafting experience to Peterssen/Keller, including extensive experience in residential detailing. He has worked on a diverse set of award winning projects, including two Home of the Month homes, Heritage Preservation Award office restoration, and a LEED Platinum home.

Prior to joining Peterssen/Keller, Jason worked as a project drafter and designer at Domain Architecture & Design. There he worked on custom lofts, numerous renovations and small commercial projects. He also worked as a drafter/designer at both Friedell Architects & Builders, as well as McMonigal Architects.

Jason is an avid outdoorsman, spending many weekends in the woods enjoying nature and occasionally in pursuit of grouse. His appreciation of good design extends to areas outside of architecture, including a passion for classic cars and outdoor photography.


Tommy comes to Peterssen/Keller Architecture with an educational focus on sustainability and urban design. His thesis project—titled Bridgescape: Re-envisioning the Washington Avenue Bridge—proposed a dynamic and inhabitable public space that would enhance the urban fabric of the University of Minnesota campus.

Prior to joining Peterssen/Keller, Tommy spent several summers as a residential drafting intern at Twin Cities Habitat for Humanity. In addition to teaching him building construction techniques and graphic standards, the experience reinforced for him the notion that good design doesn’t have to be expensive or complex. Tommy is drawn to simple and elegant designs in all realms, from architecture and furniture to apparel and graphics. He believes that good design depends on, above all else, attention to detail and quality craftsmanship.

Tommy received a Master of Architecture and a B.A. in Architecture from the University of Minnesota. He was born and raised in the Twin Cities area and currently resides near Uptown. As a proud Minnesotan, he appreciates the changing seasons, enjoys spending time on the lakes, and embraces the long, cold winters. Tommy is an avid hockey player and disc golfer.

Brent Nelson, Associate AIA, LEED Green Associate

After a youth of Lego and building block construction, Brent refined his craft at North Dakota State University where he completed a Master of Architecture degree. Upon graduation he moved back to his hometown, Bismarck ND, to help open a family owned architectural practice, Leaf Design Studio. There he developed experience in a wide range of work from community centers, to multifamily housing and mixed-use developments. In all his projects he carefully considered how each individual building helped form a community fabric.

Brent comes to Peterssen/Keller with advanced 3d modeling and design communication skills. His work offers clients real-time design walk-throughs that help team members engage design conversation. Brent finds joy in helping clients more easily understand design options and the excitement they have when a solution is found. On a nice day, Brent can be found slowly cycling Minneapolis's many trails and cycle lanes. While an urbanite at heart, Brent makes frequent trips back to the grasslands of Western North Dakota to find solace in the endless horizons and subtle landscape.

Sarah St. Louis

Sarah has been a residential designer/drafter for over 10 years. During this time she has worked on numerous Luxury Home Tour and Parade of Home houses, including Midwest Living Magazine's 2008 Idea Home, which received the Silver Star Certification from the Minnesota Green Star Program. She also worked on the Locust Hills development in Wayzata, MN, including the conversion of the 1941 horse stable into the Community Center, and the 2009 Luxury Tour home. As the daughter of a builder, Sarah grew up on the construction site and aspired from a young age to one day design homes. Sarah believes that beautiful design & quality construction starts with paying attention to the details and impeccable craftsmanship. Sarah lives in Minnetonka with her two boys and two opinionated cats.

Melinda Nelson, Associate AIA

Melinda is the director of marketing for Peterssen/Keller. She loves architecture, design, and culture, and her greatest joy is introducing like-minded people to each other and watching the beautiful results unfold. Melinda is passionate about both traditional and contemporary architecture—her favorite buildings in the Twin Cities are the enchanting Lake Harriet Bandshell and the ethereal ING Reliastar building in downtown Minneapolis.

Melinda is also an award-winning writer and editor. She is a co-author with photographer Karen Melvin of Great Homes of Summit Avenue and the Hill District. Melinda’s work has also appeared in Mpls.St.Paul Magazine, Twin Cities Business, Artful Living, Sun Country Airlines magazine, and other publications.

Melinda is an associate member of the American Institute of Architects and the Excelsior Historic Preservation Commission. When she’s not working, she loves traveling with her children and swimming in Lake Minnetonka with Sugar, the world’s most amusing yellow Labrador.

Derek Holmer

Derek is the Intern for Peterssen/Keller, assisting in its administrative and marketing operations. His interests in architecture and building in general have been fostered since he was 10 by his contractor father. Originally from small-town Kansas, he moved to Minneapolis to pursue a Bachelor of Design in Architecture at the University of Minnesota, graduating in the spring of 2014. After a summer of study abroad, cycling through the streets of Copenhagen, he has become a full fledged urban design junkie. He believes that good architecture partnered with excellent public space is integral to improving the quality of life in our cities. In his spare time, you will find him biking through this wonderful cycle city, taking a run along the Mississippi River, or helping friends with free-lance design. He is currently researching Urban Design graduate programs with the hope of returning to school in a few years.

Jonathan Dessi-Olive

Jonathan is an Intern/Project Manager with Peterssen/Keller Architecture. He joins us after completing his Masters of Architecture from the University of Pennsylvania.

Theo Grothe, AIA, NCARB

Theo joins Peterssen/Keller with over 9 years of high-end residential experience, working for a number of award winning local firms. His thoughtful consideration of every aspect of a project, attention to detail, and commitment to fostering strong client relationships are his greatest assets. Theo consider residential design to be a very personal endeavor. It's exciting, challenging and thoroughly satisfying. For him, the design of a home for a particular client begins with the client's individual ethics and values, and he feels these must remain paramount during the entire process to create an environment that truly reflects the client’s identity. Theo attended the University of Minnesota and graduated in 2001 with a Bachelor of Arts in Architecture. He then completed a Master of Architecture program in 2007 from Syracuse University in New York, winning the Graduate School Prize for Architecture, the top honor awarded to the graduate class. Apart from work, Theo is experiencing the newfound joys of fatherhood, having his first son last February. Every day is a new adventure for him. He lives in South Minneapolis with his beautiful wife Leslie, adventurous son Henry, and three lively cats.

Ted Martin, Archiect AIBC, LEED AP

Ted is passionate about architecture because it is artistic, creative, and environmental. He believes spaces respond to the environment to inspire clients and reduce impact. Ted grew up in Minnesota but lived on both coasts for many years. He received a BA in Religion from Bates College in Maine. On a semester aboard in Nepal, he documented Buddhist and Hindu architecture, thus planting the interest in sacred spaces and environmental design. To pursue a career in architecture, Ted completed a Masters at the University of Oregon, one of the foremost sustainable design programs in the country. He did studio work at University of Hong Kong and UC Berkeley and was awarded a student design award for his Masters thesis at Oregon. Ted joins Peterssen Keller from Vancouver BC where he worked for award winning firms specializing in sustainable university building design and custom “west coast modern” home design. He is a LEED accredited professional and has completed numerous LEED rated projects. He is a licensed architect in Canada. After hours, Ted is an avid cyclist, runner and skier. He lives in the Seward neighborhood in Minneapolis with his architect wife Joy and two energetic kids, Caroline and Oliver.