Once construction begins, the timeline could bring the new space online by January of next year.
In addition to the new wing, Parkland will get other upgrades, including improvements to the main lobby area.
Officials said they are looking forward to what lies ahead.
“It will be nice to see the growth with something so clearly needed,” Accashian said.
The plan will come before the Derry Planning Board at a meeting April 2 as the official site review and approval process begins.