Decus, with architecture by Luigi Rosselli

Ultramarine is envisioned as an oasis in the Sydney suburb of Mosman, blending the charm of a Federation era home with modern architectural and interior elements. The brief focused on creating a relaxed and aesthetically pleasing space while embracing the home’s location and the family’s lifestyle.

Careful attention to detail is evident throughout the residence. Custom joinery conceals services, such as air conditioning units and a fireplace, while custom-made timber wall paneling in the powder room flows gracefully from the marble skirting to the ceiling.

What sets Ultramarine apart is its seamless integration with the surroundings. Grand archways and ample glazing maximise the breathtaking harbour views, while a natural palette of whites, creams, greys, and blues creates a serene atmosphere. The internal layout caters to the family’s needs, offering both open spaces and private sanctuaries.

Modern additions harmoniously blend with the historic façade, featuring steel-framed doors, Flemish glass, and Venetian plaster. Passive cooling, thermally rated glazing, rainwater tanks for irrigation, and the use of recycled bricks showcase the project’s commitment to contemporary sustainability imperatives.


Furniture: Ralph Pucci NYC, 1st Dibs, Christopher Delcourt, Ondene, Kartell, Fogia, Fred International, Daniel Boddam, Cassina, Dimirti Vargus, B&B Italia, Space furntiure, Elisa Ossino, De Padova, David Tate, Gallery Sally Dan Cuthbert. Lighting: 1st Dibs, Studio Twenty Seven, Volker Haug, Flos, Euroluce, Jeff Martin, Saint Loche, Henry Wilson Studio, Viabizzuno, Christopher boots, Garnier & Linker, Cult, Wever & Ducre, Stylecraft, Design Nation, Allied maker. Finishes: Granite Marble Works, Blank Joinery, Di Lorenzo, Dulux, Venetian Plaster Gallery, Tongue n Groove Flooring, Stone Italiana, Vitrosca, Gerry’s Glass, SNB Stone, Euro Marble, Bisanna, South Pacific. Fittings & Fixtures: Vola, Candana, Brodware, ADH Studio, Joesph Giles, English Tapware, Winnings, Artedomus, Henry Wilson Studio.


Photography: Anson Smart


Traditional custodians: Borogegal and Cammeraigal People