Build Your Dreams

Whether it's Commercial or Residential, John Mast Construction can build it.

Large Personal Shed in Goshen, Indiana


No matter the size or style of your Commercial structure, we promise you unsurpassed quality in a building that performs for you. We specialize in programming your space, satisfying current needs with plans for future development.

Traditional Home in Nappanee, Indiana


As your Residential contractor, we build your custom home that guarantees your satisfaction, all while making the building process enjoyable to you. No matter the location, size, or budget we build whatever you ask, with Quality Start to Finish.

Roof mounted solar panels in Nappanee, Indiana

Solar Energy

We can provide you with the same energy we run our own business by installing solar panels to supply all your electrical needs. Solar panels for your home or business will eliminate your electric bill and guarantee a seven year payback.

Who We Are

JMC Thomas Mast

Thomas Mast

Randall Mast, Manager at JMC

Randall Mast

Quality Start to Finish (QS²F)

We have the history, resources, experience, and professional staffing to plan, design, and construct your project.