201/37 Heydon Street

Mosman NSW 2088

Crowning the boutique Sonnet development in Mosman, this top-floor residence defines refined luxury and timeless sophistication. Crafted by HELM – the multi award-winning developer with more than 29 National, State and Regional accolades – the apartment showcases the meticulous craftsmanship, thoughtful detail and liveability for which HELM is renowned. With just nine residences in the collection, Sonnet offers the exclusivity of boutique living paired with grand design and unrivalled privacy.

Peacefully positioned on the top floor, the residence is accessed via a hotel-inspired foyer with secure lift entry direct from the double lockup garage. Light-filled interiors unfold across expansive proportions, featuring wide American oak floors, high ceilings and full-height glazing that frames leafy outlooks across Mosman and Middle Harbour. A deep, north-east entertainer's terrace – complete with stone feature wall, gas bayonet, water and power – creates a seamless extension of the living space for year-round enjoyment.

The gourmet kitchen is a centrepiece of style and function, finished in Italian marble and bespoke oak joinery. Premium Miele appliances, a Vintec wine fridge and an integrated Fisher & Paykel French-door refrigerator elevate everyday living. Three spacious bedrooms include a serene master retreat with a walk-in robe and a hotel-style ensuite featuring a freestanding Kaldewei bath.