"We hope not to close again; it disrupts service," said Victoria Dow, assistant director of the library. "But there is a possibility."
Squeezed for space as a result of its rapid growth, the 13-year-old library on Upper Gulph Road is remaking the entire lower floor into a children's department.
A separate outside entrance is being built so children can enter their own area, where the library's popular story hours will be held.
"This is a very active, very lively library," Dow said. "It can get noisy after story hour with the kids running around."
With their own facilities on the bottom floor, the children can run around without disturbing others using in the library, Dow said.
Head librarian Marian Stevens said the library hoped the area, which will have large windows and cushiony couches overlooking Strafford Park, would give the children a place of their own in the library, "where they can feel welcome and comfortable."
The children's department, which houses 27,600 of the library's 77,000 books, periodicals and audio/visual items, is expected to be finished in January.
Plans also call for redesigning the main floor, where the adult collection and the reference desk are, and installing an elevator to run between the two floors.
"We're trying to make it easier to find things and make it more attractive," Dow said.
The elevator will make the library more accessible to the handicapped, she said, and will help the librarians move books between the floors.
On Saturday, the library will resume its normal hours of 10 a.m. to 5 p.m. The library is open from 10 a.m. until 9 p.m. Monday through Thursday, 10 a.m. to 6 p.m. on Friday, and 1:30 to 5 p.m., Sunday.