A household name in car seats is looking at a multimillion dollar expansion, but that may mean giving up its southwest Charlotte home and moving over the state line.

Britax is a European company. It’s one and only North American plant is near Carowinds.

The company makes car seats and it recently took over BOB, which makes running strollers.

Britax thinks it may need more space, even twice as much room.

It's looking at a $30 million expansion, which could mean a lot of new property taxes for Charlotte.

Apparently though, Britax's lease is up next year. Sources said the company is shopping around, looking at two sites in Charlotte and two over the border in York County where it could get a better deal. Britax’s current site is less than two miles from the state line.

People who live near Britax said Charlotte leaders should be worried and that a lot is at stake.

“Do the math," said Tim Lawrence, a resident.

Sources said Britax's executives were all in Germany Thursday and had limited access to email, so WSOC-TV has not received an official response from the company.

The Charlotte Area Chamber of Commerce said it cannot share what it is -- or is not doing -- to keep Britax in town.

But Charlotte City Councilman Warren Cooksey has talked about this struggle to keep Charlotte competitive before.

"Is it easy for a company to expand? Is it easy to knock on the door of City Hall, knock on the door of the county, and say, 'Look, I want to grow my business, I want to hire more people. Can I get it done reasonably quickly while still adhering to whatever rules and regulations are out there?'" he said. "When the rules and regulations become more onerous in Charlotte than they are in our region as a whole, then we're going to suffer."

A staff member of the city sent an email to Mayor Anthony Foxx's office, suggesting Foxx make a "personal appeal" to Britax to try to keep the company on the Charlotte side of the state line.

The mayor's assistant said Foxx does not have any comment.