91 King William Street, Adelaide

Adelaide's Most Prestigious Office Tower

360 degree views, column free floor space and finishes of the highest quality.

91 King William Street is an iconic ‘A Grade’ commercial office tower widely regarded as Adelaide’s premier CBD office building. It incorporates a circa 29,000sqm main office tower with 31 levels of central core design incorporating 360 degree views, column free floor space with large floor plates in excess of 1,000sqm.

The building underwent a significant internal lobby refurbishment in 2021 providing café and wine bar amenities to occupants as well as activated seating and working areas within the main building lobby. Additionally, the building includes high quality finishes, premium End Of Trip facilities, 54 basement car bays and a serviced office provider specialising in flexible desks, virtual offices, coworking spaces and bookable meeting rooms (learn more), positioning 91 King William St as the CBD’s preferred modern workplace environment.


Facilities and Features

Concierge service
Onsite security
Employee health and
wellbeing offers
Access to events and
meetings space
Lobby café
Bars & restaurants
Onsite drycleaning service
Onsite change rooms
Onsite shower
Complimentary towel
Onsite lockers
Onsite Bike Storage
Accessible facilities


Our team has a strong focus on environmental performance. Our sustainable initiatives aim to provide enhanced occupant comfort, reduced draw on resources and lowered building operating costs to achieve environmentally responsible workspaces and buildings.


Constructed in 1989, the main building is the tallest building in Adelaide, providing a landmark 33 storey office and retail tower. The lobby and amenities have been upgraded in 2021, with external plaza works currently being finalised.

The secondary buildings include Perpetual House, a State heritage listed four storey building with a basement tavern and three upper levels of office space, and The Delmont Building, located to the
rear of the site, providing office space over two levels.

Lease Availability

124.7 sqm
364.78 sqm
156.82 sqm
201.9 sqm
1117.9 sqm
310.8 sqm
185.8 sqm
46.2 sqm

Flex by Abacus

Building Management

The Building Management Team care for all aspects of the building, from maintenance to operations, ergonomics and sustainability. They handle administrative tasks, promote our tenants and ensure safe and enjoyable spaces for collaboration and renewal. They form an integral part of our strong partnership with our tenants, and understand that without this, the building wouldn’t be able to thrive. For more information, speak to our team or login to the customer portal below.

Log in to the help desk portal


The building provides a diverse variety of office options, basement car parking and ground floor entry foyer with a three-storey height Grand Hall. Additionally there are end of trip facilities including showers, bike storage and changerooms, as well as premium onsite dining options ‘Vault 91‘ and ‘La Louisiane‘. The building also includes a serviced office provider specialising in flexible desks, virtual offices, coworking spaces and bookable meeting rooms (view more here).

Dining and Bars

The building features an onsite café/wine bar ‘Vault 91‘, featuring one of the most extensive and unique wine and spirit lists in Adelaide. In the basement there is a French-inspired restaurant and bar ‘La Louisiane‘ that blends French cuisine with live jazz music and world-class beverages. In addition there are a number of neighbouring restaurants including the Meat & Wine Co and famous Leigh & Peel Street dining precinct.


In addition to the onsite café/wine bar ‘Vault 91‘, offering first-class service and top-grade coffee, the building is just a stones throw to the famous Leigh & Peel Street dining precinct with over 40 well known café eateries.


The building has direct access through to Topham Mall parking and retail complex, and is adjacent to Goodlife Gymnasium and Bank SA.

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