435 E 52Nd St

River House is a landmark prewar cooperative on Manhattan's East River, completed in 1931 and organized around a 26‑story central tower flanked by lower wings. Designed in the Art Deco idiom by William L. Bottomley (with contributions by Wagner & White), the building reads as a formal, palazzo-like residence set back from the street behind gated cobblestone motor courts and planted courtyards. With roughly three dozen large apartments remaining in a historically low-density composition, layouts emphasize grand public rooms, multiple service spaces, high ceilings, and proportionally large bedrooms and dressing rooms. Typical units feature private elevator landings, entrance galleries, formal dining rooms, libraries or studies, eat‑in kitchens with butler pantries, abundant closet and storage space, and original details such as moldings and wood-burning fireplaces alongside modern renovations. Shared facilities include meticulously maintained formal gardens, a lower lawn and play area, rooftop terraces and private terraces for select residences. Building services are full white‑glove: 24‑hour concierge and doormen, resident manager, extensive staff coverage, multiple passenger and service elevators, on-site maintenance and storage. Residents may access the River Club at the building base — a private social and athletic facility with pool, courts, fitness spaces, dining and guest rooms. The co-op permits pets and pied‑a‑terres and maintains customary board controls, a flip tax, and a well-established renovation/assessment regimen reflective of an owner‑occupied, service‑forward cooperative in a quiet cul‑de‑sac location along the riverfront.