Shortly after a major internal renovation in 1983, McArthur sold Kyle House to the Mercantile and General Life Assurance Co of Australia Ltd.[1][3] Precast concrete panel/decoration, Face brick, Alumin.

Kyle House is aesthetically significant as an important example of Inter-war Art Deco style emphasising verticality and detail of cladding materials.

[1][3] Together with the adjacent commercial buildings in Macquarie Place, Kyle House forms an important landmark feature, and contributes to the historic streetscape character.

The rear courtyard and access way arrangement is relatively rare in Sydney today, and reflects the nature of the area's association with the development of shipping and trading from the early 19th century.

The area's association with early traders, being close to circular Quay and the Tank Stream, was strengthened by the opening of the Royal Exchange Building in Bridge Street, directly opposite Macquarie Place in 1851.

This was to become the meeting place of merchants, bankers, businessmen and shipping agents, an association which was still relevant at the time of the building of Kyle House, and which still remains today.

[1][4] Kyle House is aesthetically significant as an important example of Inter-War Art Deco style emphasising verticality and detail of cladding materials.

[1][3] Kyle House is significant as one of the first office buildings constructed in Sydney which broke away from the traditional stylism, in an early attempt to search for architectural forms and decorative elements more relevant to the 20th century.

[1][4] Kyle House is a good example of office building of this era reflecting the planning restrictions of the day as regarding height, and employed an early use of the cantilevered structural concrete, demonstrating the potential of this form of material.

The building is significant as a good example of a style limited in representation today, the façade of which has generally remained in its original form and configuration since construction in 1931.

[1] The rear courtyard and access way arrangement at Kyle House is significant, for its relative rarity in Sydney today, and as a reflection of the nature of the areas association with the development of shipping and trading from the early 19th century.