Josh Johnson started his landscape company, J n’ J Yard Work, with his cousin Patrick Johnson when he was just 16 years old. Now, as a more seasoned entrepreneur at age 21, the Ashmont area man hopes to expand its services and secure a stand-alone office in Dorchester by next year.

Currently a senior at Babson College, where he is getting his degree in business, Johnson is employing the skills gleaned in class to grow J n’ J Yard Work from simple lawn care to the design and installation of more complex landscapes, as well as the management of large-scale properties.

“We want full year contracts, not just small jobs,” says Johnson, who is seeking local teens to employ as his company grows. “We want the chance to get to know people’s properties, and help develop the right look and plan for them.”

Johnson sees massive opportunity with the proliferation of condominium units around Boston—and especially in Dorchester. Many condo associations, he says, need someone to manage the sites for them.

J n’ J Yard Work provides excellent employment opportunities for college students, but also, when there’s more of a loose schedule in the summer, high school ones. Weekly hours are flexible, which allows employees to take on as much responsibility as they can on each given week.

“We initially walked around the neighborhood with a lawnmower, just seeing who needed help,” recalls Johnson. “That’s what sets us apart now, I think: We’re still locally based, and we’re homegrown.”