Fourteen floors, roughly 270-plus rooms, and a footprint inside a 150-year-old civic landmark: that's the scale of Adelaide Marriott Hotel, occupying one of Adelaide's most historically significant addresses in the former General Post Office (GPO) building on King William Street, directly opposite Victoria Square in the heart of the CBD. The original GPO structure was constructed between 1867 and 1872, designed by architect Edmund Wright in collaboration with Edward Hamilton, and was reportedly the most expensive building the South Australian colonial government had funded up to that time. The heritage building was later redeveloped with a contemporary hotel tower rising above and around it, and the property opened its doors as South Australia's first Marriott-branded hotel in 2024. That heritage-meets-new-build story is what sets this property apart from Adelaide's other international-brand hotels: guests are staying inside a heritage-listed civic landmark that has been given a fresh purpose, rather than in a purpose-built tower with no civic history attached to it.
Traveloka's own listing describes the property as offering 273 rooms, while Marriott's official property pages describe the development as comprising 285 large guest rooms including a Presidential Suite, a Club Lounge, signature restaurants and bars, a swimming pool, a fitness centre, and function and conference space; prospective guests should treat the exact current room inventory as approximate and check the live booking page for the confirmed figure at the time of booking. Both sources agree, though, on the scale and ambition of the redevelopment - this is a full-service, five-star-positioned hotel built into and around a heritage civic building, not a boutique conversion of a handful of rooms.
For travellers researching Adelaide accommodation, the practical takeaway is that Adelaide Marriott Hotel combines a landmark heritage facade with modern Marriott-standard rooms, dining, and meeting facilities, in a CBD location within walking distance of Victoria Square, Rundle Mall, and the Adelaide law courts and government precinct.
The M Club Room comes in at roughly 51 square metres and is the only category here bundled with entry to the hotel's own M Club executive lounge, a space set apart from the main public areas - that lounge access, more than the square metreage, is what marks this out as the top standard-tier room. Marriott's own property pages are the source for this room-tier detail, since Traveloka's live listing does not break out named categories in its structured data - treat the names and inclusions below as indicative, and confirm the exact room name and configuration on the booking page before paying.
The Superior Room sits at the entry level. Marriott describes it as a generously sized CBD room built for a mix of rest and work, with large windows that - depending on where the room sits within the 14-storey building - can look out over the city, the Adelaide Town Hall clock tower, or Victoria Square. Two mid-tier options branch off from there: a King Deluxe Guest Room and a Double Deluxe Room with Views, both marketed around their CBD outlook, followed by the King Premium Room, which Marriott positions as a further step up between the Deluxe rooms and M Club.
A pairing of named suites tops the ladder. The Clock Tower Suite is listed by Marriott with a two-bedroom configuration option, while a separate signature suite runs to roughly 145 square metres in a penthouse-style layout, with its own lounge, city and Adelaide Hills views, and a dedicated office area. Marriott's broader property description also mentions a Presidential Suite as part of the redevelopment brief. Because suite naming has a habit of shifting between a developer's original press materials and what actually appears on the live booking site, anyone chasing the top-tier suite should double-check its current name and size directly with the hotel.
A rain-shower bathroom stocked with premium amenities sits alongside Marriott's signature bedding, a chaise lounge and occasional table, a large wardrobe, an LED TV with Chromecast, unlimited high-speed Wi-Fi, and coffee and tea making facilities - the shared inclusion list Marriott's room pages point to across the standard categories, Superior through King Premium. Minibar access only shows up at suite level. Traveloka's listing itself does not currently publish a room-by-room amenity breakdown, so anything specific - rollaway beds, connecting rooms, hot tub availability - is worth confirming directly with the property or on the live Traveloka booking page rather than assumed from this summary.
Multilingual staff run the 24-hour front desk here, offering express check-in and check-out inside a building that started life as a 19th-century post office rather than as a purpose-built hotel shell. Traveloka's own listing confirms the core facility set directly, and Marriott's official pages fill in a few extra details noted below.
Marriott's overview page also references function and meeting rooms as part of the original redevelopment brief - a reasonable fit for a full-service CBD hotel of this scale, though anyone planning an event should confirm current conference-room capacity with the hotel's sales team rather than general marketing copy.
Rundle Mall and the Adelaide Town Hall clock tower are both an easy walk from the front door, because Adelaide Marriott Hotel sits at 141 King William Street, directly facing Victoria Square in the centre of the Adelaide CBD - one of the city's principal public squares and a hub for the tram line that runs the length of King William Street. Marriott's own overview page markets the hotel as overlooking Victoria Square, which lines up with Traveloka's address data for the property.
From this King William Street position, the North Terrace cultural boulevard - home to the Art Gallery of South Australia, the South Australian Museum, and Adelaide Railway Station - sits a short stroll to the north. Guests connecting onward by air can compare current fares and book a flight into Adelaide with Traveloka before arranging transfers into the CBD; the property's own listing notes valet parking a block away for guests arriving by car.
Because the hotel is built into a heritage civic building rather than a purpose-built tower on the city fringe, its King William Street position gives guests immediate CBD walkability rather than requiring a shuttle or rideshare into town, which is a meaningful practical difference from some of Adelaide's suburban-fringe hotel stock.
Penny Blue is the standout of the property's three named on-site outlets, per Marriott's official dining page - a modern Australian restaurant serving refined dinner service (Marriott's page cites Tuesday to Saturday evening hours) that blends contemporary technique with a nostalgic nod to classic dishes. The other two are:
Beyond the hotel's own outlets, the King William Street and Victoria Square location puts guests within walking distance of Adelaide's central dining precincts, including the laneway bars and restaurants around Peel Street and the Adelaide Central Market food stalls to the west of the CBD. Guests wanting to plan a full day out beyond meals can also browse Adelaide activities and attractions on Traveloka to round out an itinerary around the hotel.
Sleep inside a heritage-listed 1867-1872 former General Post Office, not a hotel with no architectural story attached - that's the clearest reason to choose this property over a generic CBD business hotel. Combined with its position directly on Victoria Square, guests get heritage character and postcard-worthy surroundings without giving up modern Marriott-brand amenities such as a pool, fitness centre, executive lounge access on M Club rooms, and multiple dining outlets on-site.
The location also suits a wide range of trip types. Business travellers benefit from the CBD position and on-site meeting space; leisure travellers benefit from the walkable access to Rundle Mall, North Terrace's museums and galleries, and the tram line running past the door; and guests who want to compare this stay against other options nearby can browse more Adelaide hotels on Traveloka to see how the CBD heritage positioning stacks up against suburban or beachside alternatives.
Marriott's site names several distinct room tiers here - Superior, King Deluxe, King Premium, M Club, and the suite-level rooms - so it's worth checking exactly which category shows up on your Traveloka booking screen before paying, rather than assuming a generic "standard" listing matches the Superior Room described above.
Traveloka's listing puts check-in from 3:00 pm, with check-out somewhere between 11:00 am and 12:00 pm; both are worth reconfirming for your specific dates, particularly if an early arrival or a late departure is part of the plan.
Popular Facilities | Restaurant, 24-Hour Front Desk, Parking |
Check-In / Check-Out Time | From 15:00 - to 11:00 - 12:00 |
Available rooms at Adelaide Marriott Hotel | 273 |
Number of floors in Adelaide Marriott Hotel | 14 |
Another facilities in Adelaide Marriott Hotel | Valet parking, Security, Disabled access friendly, Coffee shop, Room service |
