Prime Opportunity in Carnegie Hill Welcome to Unit 1C at 108 East 91st Street, a rare flexible-use opportunity nestled in a stunning Neo-Renaissance boutique co-op just off Park Avenue. Spanning approximately 600 square feet, this ground-floor unit is currently configured as an office space but can be converted into a charming residential residence, offering endless potential for end-users or investors. Featuring 9-foot ceilings, the space feels open and airy, enhancing its flexibility whether used for commercial or residential purposes. The building exudes timeless elegance with a part-time doorman on duty from 8 AM to midnight, seven days a week, and the convenience of a live-in resident manager. Additional amenities include a laundry room for residents and a pet-friendly policy, all within a well-maintained, prewar setting that blends historic charm with modern service. Perfectly situated just two blocks from Central Park and around the corner from the iconic 92nd Street Y, the location offers immediate access to the very best of the Upper East Side-world-class museums, cultural institutions, restaurants, and shops. Commuting is a breeze with the 86th Street 4/5/6 trains and the Second Avenue Q line. Whether you're seeking a quiet commercial space in a prime location or envisioning a welcoming home, Unit 1C delivers flexibility and style in equal measure. Key Features: Approx. 600 SF 9-foot ceilings Currently built as an office; convertible to residential Elegant Neo-Renaissance boutique building Part-time doorman (8 AM-12 AM daily) Live-in resident manager Laundry in the building Pet-friendly policy Coveted Carnegie Hill location, just off Park Avenue Close proximity to Central Park, the 92nd Street Y, museums, restaurants, and more Subway lines: 4/5/6 and Q A unique opportunity in one of Manhattan's most desirable neighborhoods. Reach out today to schedule a private showing.