Over 45 years in business is a long time in the construction industry. We didn’t make it this long by just being a contractor. Anyone can just be a contractor. What we do is take care of our clients -Forever. Clients for life is our creed. We build trusting relationships with our clients, take care of them and they take care of us.


Roger O’Herren started Shamrock Builders in 1967 building modestly priced homes in Central Indiana. In 1982 Roger’s son Greg joined the company after earning his degree from DePauw University. In 1984 George Geiger joined the company. During this time, Shamrock Builders continued to grow and build larger custom homes. Shamrock Builders also began to diversify developing residential subdivisions. Over the years, we have built over 700 residential homes. Today, we continue to build and remodel homes. We are proud to say we have several repeat customers and we have three customers who have built with us three times!


In 1996 Shamrock Builders expanded into commercial construction. We are a full service Development and Construction company. Since that time, we have built over 500,000 square feet of ground up commercial buildings. Additionally, we have completed hundreds of commercial tenant improvement projects. We travel across the state of Indiana to help our clients.

One of the benefits of building both commercial and residential is that our quality and outstanding customer service shine through and we have had several residential customers contact us to build their offices!


Dental/ Medical construction is not rocket surgery but it takes a special level of attention to detail and experience to do the job right the first time. We are the leading contractor for dental construction in Central Indiana. With 50 + dental projects under our belt, we know what it takes to make a dentist smile! Dentists are perfectionists and they want it done right. That’s what we do. If something is not to the Doctor’s expectation, we fix it – no questions asked. Ask your equipment sales rep about our reputation for treating our doctors fairly and honestly. We come back year after year to help them with ongoing service or expansion needs.

Design/Build - Turnkey delivery:

Are you tired of paying rent? Do you want to own your own building but don’t know where to start? Start with Shamrock Builders. We have a complete team of architects, engineers, interior designers, construction and long term customer service professionals. We can help you locate your site, get it zoned and help you obtain the financing.

Joint Ventures:

We have partnered with many of our clients to develop and co-own projects. We handle the details, lead the project and contribute equity to the deal. You get to focus on your day job.

Space for Lease:

Shamrock Builders owns and manages numerous office buildings. All of our buildings are in highly desirable locations with quick access to the highway. Our buildings are newer, provide easy parking at your front door, feature high end interior finishes and have easy in and out access.

Property Management:

We provide property management for all properties we own. We also manage properties owned by others. Our property management staff is quick to respond to requests for service and quotes.

Self Storage:

Shamrock is currently developing “Brook School Road Self Storage” in Fishers,Indiana. This is not your typical self storage development. This 85,000 square foot project is institutional grade and will feature the latest in security and technology.