An overhead view of the proposed new library. Specs by Turner After years of planning, New Canaan Library last week filed applications with Planning & Zoning that are designed to allow the organization to build a new glass-and-stone exterior facility that features an auditorium, outdoor terrace, café and public concourse, and reimagines use of its gateway block to the downtown. The 42,641-square-foot facility’s contemporary design “builds on New Canaan’s legacy of mid-century architecture and site planning and expresses its purpose as a principal community institution,” according to a Feb. 26 application to the Planning & Zoning Commission from attorney Ted O’Hanlan of Stamford-based Robinson+Cole.