IDEXX Laboratories, Inc. said this morning that it plans to expand in Maine, possibly creating as many as 500 new jobs.

The company held an 11 a.m. press conference to discuss its plans, which it said represents a $50 million investment. Plans call for building an estimated 200,000-square foot corporate administrative building in Westbrook.

IDEXX has 1,600 Westbrook-based employees. It has a manufacturing and research and development facility at the Five Star Industrial Park in Westbrook.

The company has been heavily involved in zoning questions surrounding nearby Pike Industries.

Jonathan Ayers, CEO of IDEXX, said at the press conference the new building would be located in the industrial park if the city rezones the park for light industrial and technology uses.

“We want to build this new facility on our existing campus in Westbrook,” Ayer said in a written statement. “Westbrook is the home of IDEXX Laboratories, Inc., and we have found the city to be a supportive partner with a vision that fosters investment in growth and employment. In addition, our culture of innovation is nurtured by having our employees located in close proximity.