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Keffer/Overton History:

Keffer/Overton (K/O) is a full service design firm specializing in architecture, planning, and construction coordination. K/O has the distinction of being the oldest active architectural firm in Central Iowa. We trace our lineage back to 1876 when Bell & Hackney opened the doors of their architectural practice to design and complete construction of the Iowa State Capitol Building in Des Moines. Throughout the years the mantel of practice has passed on to successive generations. With each new generation, the name of the firm has changed accordingly. In 1993, on the firm’s 112th anniversary, the name was changed to Keffer/Overton. K/O focuses on renovation/restoration, public, commercial, retail, cultural/museums, and mass entertainment project types. K/O is a nationally recognized designer specializing in entertainment facility and fairground related design with many projects around the United States. Our projects have demonstrated a full range of design services including architecture, landscape architecture, interior design, condition analysis, infrastructure repair, historic renovation, planning, master planning, programming, and construction management. How do we achieve this? We view each client as a friend, and honor that friendship with the utmost courtesy and respect.

Notable Historic Buildings:

State of Iowa Capitol Building 1885
Des Moines Public Library 1899
Iowa State Fair Grandstand 1909
University of Iowa Library 1949



We Design Community

Keffer/Overton Associates Inc.

Commercial, Cultural, Fairground, and Entertainment Planning & Design

Year Established: 1876
12th oldest Architectural Firm in the U.S.

K/O Fairground – Portfolio

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Free Cup of Coffee!

Let us buy you a cup of coffee!

Do you have a project lead, a design idea, a crazy business concept, or maybe you just want to bend the ear of “your architect”? Give us a call, we’ll hear you out, and have our very own K/O barista prepare you a latte macchiato, or any other coffee drink of your choosing…

Not from our area – let’s set-up a Video Conference and we’ll send you a gift card to your local coffee shop so you can enjoy a cup of your favorite joe while we chat!

Our Bio!

Founded on the core values: Quality. Innovation. Creativity. Integrity. Client Service.

Keffer/Overton (K/O) is a full service, design firm specializing in architecture, interiors, planning, and construction coordination.

From our offices based in Des Moines, Iowa we focus on renovation/restoration, public, commercial, retail, cultural/museums, and fairground entertainment project types. We are a nationally recognized design-leader specializing in master planning, expos, entertainment, arenas, multi-purpose, stalling, equestrian, livestock and amusement related design with many projects throughout North America.

Whether you are considering an office remodel, a move, a new building, an addition to your home or even a new fairgrounds give K/O a call. Let us buy you a cup of coffee and find out how enjoyable high quality design and great service can be!

K/O Categories