Situated on a high floor along one of the Upper East Side’s most coveted residential avenues, this gracious and generously proportioned one-bedroom apartment offers the flexibility of a true one-bedroom with the potential to function as a two-bedroom or one-bedroom plus den. Partial East River views and abundant natural light complement the thoughtfully designed layout, which begins with a welcoming entry foyer and leads into a well-appointed galley kitchen featuring exceptionally tall cabinetry and ample storage. Beyond the kitchen, a spacious dining area offers remarkable versatility and can easily be transformed into a home office, den, or additional sleeping area. The oversized living room is exceptionally bright and inviting, with a full wall of windows and a through-the-wall air-conditioning unit. The enormous bedroom easily accommodates a king-size bed and additional furnishings, while a generous walk-in closet provides excellent storage. A second wall of windows overlooks a quiet, tree-lined street, creating a peaceful and private retreat. Additional closets throughout the apartment further enhance its functionality. 55 East End Avenue is a well-established cooperative offering a full suite of amenities and services, including newly renovated hallways, a recently renovated lobby, 24-hour doormen, a resident manager, fitness center, bike room, storage, and a beautiful roof deck with sweeping views of the East River. Ideally situated at the northern end of the Upper East Side, East End Avenue provides a tranquil residential setting just moments from Carl Schurz Park and the East River Esplanade, while offering convenient access south to the FDR Drive and west to 79th Street and crosstown transportation. Pets are welcome, and pied-à-terres are permitted with board approval. *Some photos are virtually staged.