Experience the

Plus One Difference

About Us

For nearly 40 years, Plus One Professionals Real Estate has served Midwest Ohio communities. Our office is located in St. Marys, OH, but we also serve towns across Mercer, Allen, and Shelby counties in addition to Auglaize County.

With a focus on customer service, we always go one extra step for our clients. Our Realtors can help you whether you’re moving in, out, or around the area.


We handle the details & paperwork!

What Sets Us Apart

Our professional team of Realtors are experts in the local market. With more than 15 sales agents and a full-time support staff, we have the resources and experience to maximize your benefits when buying or selling a home. All of our Realtors are fully-licensed and are required to complete continuing education in order to keep up to date with real estate laws and current trends.

We go above and beyond to ensure your buying or selling experience is as seamless and stress-free as possible. We use 21st century technology, including virtual online tours and e-signatures to make your experience convenient while also delivering satisfying results.

For sellers, we offer a free, one hour consultation with interior designer, Shelly Herman, of Grace Interiors. Shelly will help you with furniture placement, organizing, and more to help you get top dollar for your home!

Realtors in St. Marys, OH | Plus One Professionals Real Estate

#1 agency in Sales in the St. Marys/Moulton area for




Awards & Memberships

Our History

→ 1982

Company Founded in St. Marys by Steven Mackenbach

→ 2016

Krista Opperman purchases company from Steven Mackenbach, becoming the first female in St. Marys, OH to be both broker and owner of a real estate company.

1982 →

2016 →

For more information about about our office contact us at 419-394-7402 today!

Real Estate Agency in St. Marys, OH | Plus One Professionals Real Estate

Plus One Professionals Real Estate

156 East Spring Street
St. Marys, Ohio 45885


Phone: 419-394-7402
Fax: 419-394-7405
Email: info@plus1prorealty.com
Hours: Open 24 Hours