Sanlorenzo has unveiled its largest superyacht to date, the 74-metre 74Steel, combining bespoke Italian craftsmanship, sweeping space, and advanced diesel-electric propulsion before taking to the water in La Spezia.

Italian shipyard Sanlorenzo has formally revealed its newest and largest superyacht build to date, the 74-metre 74Steel, ahead of her official launch in La Spezia. Measuring 74 metres in length with a volume of approximately 1,900 gross tons, this steel and aluminium superyacht stands as the largest craft ever constructed by the renowned Italian shipyard. Designed to balance architectural grandeur with subtle elegance, the flagship marks a significant milestone in the brand’s history, showcasing how substantial scale can enhance serenity and refined living at sea.

The market response to the new series has proven exceptionally strong prior to her official launch. Sanlorenzo has already secured three hull sales, with a fourth unit currently under negotiation. Built upon a pre-engineered technical platform, each order reflects the yard’s made-to-measure ethos, allowing owners to co-create custom interior layouts, bow configurations, and propulsion systems without compromising structural integrity or technical reliability. While the initial platform was engineered for a 72-metre length overall (LOA), variations in owner-selected bow shapes have customised the final length across individual builds. Furthermore, whilst the first two units feature diesel-electric propulsion setups, the third hull has been specified with conventional inline shaft propulsion.

Architectural Form and Cohesive Design Philosophy

The exterior profile of the Sanlorenzo 74Steel was penned by Rome-based studio Zuccon International Project. The design language blends soft, sinuous lines with structural strength, featuring a distinctive vertical bow and a dynamic stern arrangement on the first build. Architect Bernardo Zuccon noted that the project represents a decisive evolution in floating architecture, approaching the vessel’s massive dimensions with stylistic restraint inspired by architectural principles.

For the interior of the first hull, Sanlorenzo collaborated with Francesco Paszkowski and Margherita Casprini. The living quarters feature gently curved furniture pieces and custom-shaped rugs that visually delineate open-plan spaces. Matte wood finishes form the primary aesthetic baseline throughout the yacht, paired with eclectic materials, bespoke artwork, and distinct varieties of marble selected for each en-suite bathroom.

Advanced Technical Infrastructure and Propulsion

The first unit of the 74Steel utilizes an advanced hybrid propulsion system engineered in-house in collaboration with Siemens Energy. The setup comprises six variable-speed Volvo Penta – Mase generators driving twin 1,000 kW Schottel E-Pods. This power network is supported by a 1.5 MWh capacity LEHMANN COBRA battery storage system utilizing lithium iron phosphate (LFP) cell technology. By reducing the space required for traditional machinery rooms, the diesel-electric configuration allows technical areas to be repurposed for guest amenities, including an expanded beach club.

For interior climate control, the vessel employs a Variable Air Volume (VAV) HVAC system. This infrastructure monitors temperature and occupancy in real time to regulate airflow across individual zones, optimizing energy consumption while maintaining low sound levels throughout the interior spaces.

Tour Across the Decks

• Sun Deck

The topmost level features an al fresco dining suite, a full bar unit, and forward sofa seating situated around an open firepit. A forward hot tub is surrounded by sunpads, whilst a glass windbreak beneath the hardtop offers shelter from sea breezes. The aft section is dedicated to sunbathing.

• Owner’s Deck

Dedicated entirely to private living, the Owner’s Deck encompasses 130 square metres of interior space alongside expansive private exterior decks. The layout includes a private lounge, an office, a walk-in wardrobe, and twin spa-inspired bathrooms—one of which houses a stand-alone bathtub. The king-size bed overlooks a private forward terrace equipped with a hot tub. Controlled access points and dedicated staircases ensure complete privacy from guest and crew traffic.

• Bridge Deck

The 56-square-metre wheelhouse houses an integrated bridge system supplied by Team Italia (a subsidiary of the Rolls-Royce group) alongside a walk-around Portuguese bridge. The foredeck functions as a touch-and-go helipad. Accommodation on this level includes the captain’s cabin and an additional suite reserved for staff or a pilot. A sky lounge aft serves as a TV media room, featuring sliding glass doors that open to a teak-decked interim space and an outdoor al fresco dining veranda.

• Main Deck

The main deck accommodates five guest suites, comprising two twin cabins, two double cabins, and a full-beam VIP suite equipped with a living room that can be closed off via sliding panels. A central hallway leads into a 130-square-metre main saloon and cinema lounge, separated by a bar from a formal dining table designed for 14 guests. Continuous sliding glass doors along the salon perimeter provide natural cross-ventilation and panoramic views. A double staircase on the aft deck leads down to the lower deck wellness space, while the main deck exterior centres around a large glass-bottomed swimming pool that filters natural light down into the beach club below.

• Lower Deck

The lower deck houses a professional-grade galley, a crew dinette, 11 crew cabins, and a 12th cabin that can function as a medical berth. Independent crew staircases link the lower deck directly to the bridge deck for discreet service. Midships tender garages house a 10-metre Pascoe limousine tender, a crew tender, and various water sports equipment.

The aft section contains an extensive beach club and wellness complex featuring a gymnasium with a fold-down platform, a massage room, a sauna, a hammam plunge pool, and a family entertainment room. When anchored, fold-down side bulwarks and a flush transom door expand the area into a 290-square-metre sea-level deck.

• Tank Deck

The lowest level is dedicated to operational services, including cold storage rooms, dry store spaces, a refrigerated garbage room, a wine cellar, a crew gym, and a crew lounge. Demonstrating the platform’s versatility, the first hull features an integrated hydroponic cultivation system on the tank deck, allowing fresh vegetables to be grown on board without soil.