Serta Simmons Bedding to build national headquarters in Doraville

A conceptual image shows plans for Serta Simmons Bedding's 5-acre headquarters on the Doraville site of a torn-down General Motors plant.

A conceptual image shows plans for Serta Simmons Bedding's 5-acre headquarters on the Doraville site of a torn-down General Motors plant.

Serta Simmons Bedding, the nation's largest mattress company, announced Monday it finalized plans to build a headquarters with 500 employees at the Doraville site of a torn-down General Motors plant.

The Serta Simmons office building and research center is a major milestone for the redevelopment of the 165-acre GM site, which has been renamed Assembly. The area has been mostly vacant since the factory closed in 2008.

The 210,000-square-foot facility, which is scheduled to open in early 2019, will combine all of the company’s locations on a 5-acre campus, said Serta Simmons CEO Michael Traub.

“An integrated and unified work environment that will foster better collaboration, innovation and teamwork will better support our growth trajectory,” Traub said in a statement. “This is what our new location will deliver.”

The Atlanta Journal-Constitution reported Serta Simmons' relocation plans last month, but the company made the move official Monday.

Serta Simmons will receive about $16.8 million in property tax discounts to help offset the $65 million cost of the new headquarters, according to terms of a memorandum of understanding between the company and the Doraville Development Authority. The company will do business on the site tax-free for its first three years, then gradually pay more property taxes over the next 27 years.

“We are delighted to welcome Serta Simmons Bedding to Assembly and the Doraville community,” Doraville Mayor Donna Pittman said in a statement. “We look forward to a long and fruitful partnership.”

About 380 of the jobs at the Serta Simmons HQ are already in the Atlanta area. They’ll move from the company’s corporate headquarters in Buckhead, Simmons Beautyrest brand offices in Dunwoody and a research and innovation center in Norcross.

Another 120 employees based at the Serta brand offices in Hoffman Estates, Ill., are being offered positions at the company’s new location.