Harrison Room, 1750: designed by Peter Harrison, this room is the most historic part of the Redwood Library. The Library's Original Collection of books, purchased in London with Abraham Redwood's donation of 500 Sterling, are arranged on the shelves according to their size not their subject, a common practice in colonial times.

Pell-Chaffee Room, 1858: one of two wings added to the side of the Harrison Building with the Reading Room addition, it currently houses the Doris Duke Preservation Library.

The Bernard and Sarah Gewirz Young Adult Library, 1858: the second of two wings added to the side of the Harrison Building, this room holds fiction and non-fiction for young adults, grades 5-8.

The 1747 Shop, 1750: until 2005, this corner of the Library had been reserved for the office of the Library Director and now houses the Redwood's gift shop.

The Roderick Terry Reading Room, 1858: designed by architect George Snell, this lovely room is the heart of the library and offers a quiet place to read a favorite periodical or book. Tables in the center of the room showcase current issues of more than 200 periodicals and newspapers, while fiction and literature occupy the shelves. The room's domed cupola provides a flood of natural light by day and is dramatically up-lit at night.

The John E. Rovensky Room, 1875: designed by architect George Champlin Mason, this stunning and magnificent room houses the Redwood's card catalogue (added in 1884), the mahogany vitrines which are used for rotating exhibitions, reference books, new books and magazines of interest, and the circulation and reference desks.

The James and Candace Van Alen Art Gallery, 1940: as a result of a generous donation, this former staff area has been transformed into a state-of-the-art, climate-controlled exhibition gallery, highlighting in-house as well as collaborative exhibitions.

The Vestibule, 1875: the newly renovated main entry to the Redwood Library, the vestibule welcomes visitors to the Redwood where they can hang their coats or visit one of two ADA compliant restrooms.

The Perry Stacks, 1912: this wing houses non-fiction stacks in the basement, mystery and audiovisual collections and staff offices on the main level, and the John Slocum Scholars' Reading Room on the second floor. The ADA compliant elevator allows for greater access to the Redwood's collections.

The Alletta Morris McBean Wing, 1985: the first and second floors of this area provide space for the Redwood Library's Special Collections while the basement houses the newly expanded, climate-controlled vault fitted with compact shelving.

The 2005 Addition: this 4,500 gross square foot addition provides for additional compact shelving on two levels - basement and first floor - and the multipurpose Ralph Carpenter Board Room on the second floor.