Things to consider in your floorplan:
Full class and small group instruction areas
Small group collaboration and work spaces
Quiet areas
Circulation
Browsing
Access to online resources/online catalog
Group presentations
Comfortable seating
Shelving for resources
Office(s) for library staff
Brodart Furniture - School and library supplies vendor
DEMCO Furniture - School and library supplies vendor
Visit the DEMCO Ideas & Inspiration webpage that covers Space Design and other library topics
MiEN Company - Award-winning furniture ideal for collaborative spaces, active learning, and makerspaces
Project ENABLE Floor Plan Tool - Specify the dimensions of your library, drag and drop furniture into the space, and use the grid to ensure that the layout adheres to the ADA guidelines
Teen Space Guidelines - From the Young Adult Library Services Association (YALSA)