Stonington — The borough Planning and Zoning Commission continued its public hearing Tuesday night on a proposal by the Stonington Historical Society to finally construct a 500-square-foot addition to the Old Lighthouse Museum.

The commission is scheduled to resume the hearing at 7 p.m. May 9 at Borough Hall, at which time historical society representatives will have an opportunity to respond to concerns raised during the hearing from residents about the size of the addition, the use of pavers for a walkway and a handicapped parking spot.

This is the society’s fourth attempt to renovate and slightly expand the size of the museum. Neighbors have opposed all the previous plans, including two larger designs in 2013 and 2015, and one last summer. They also have been concerned the society would host more special events on its lawn and generate more traffic.

In December, the commission approved its own zoning amendment that allows it to grant a special-use permit to nonconforming uses that serve the public, such as the museum, restaurants and shops in all zoning districts, to expand for the purpose of complying with public health and safety standards, such as the Americans with Disabilities Act. The lighthouse is a nonconforming use. The amendment has paved the way for the society’s new application.

The addition would accommodate a handicapped bathroom as well as a ticket counter that could be accessed by visitors, volunteers or employees using a wheelchair. The existing ticket counter in the front of the museum cannot be accessed by wheelchair. Moving the ticket area also would open up space for exhibits.