He also emphasized architectural effects through the massing of the parts rather than ornamentation, granting Mackintosh creative freedom in his design ideas.

[5][6] Mackintosh carefully observed the everyday life of the Blackie family before creating any drawings, aiming to tailor the house to the needs of its occupants by addressing functional aspects before developing the design.

As a temporary solution, the National Trust enclosed the Hill House in a transparent porous "box" in 2019, allowing some movement of air, so that the structure dries out gradually.

In 1953, the then owner Campbell Lawson, commissioned Glasgow architect Margaret Brodie to redesign details to resolve this issue.

[15] The mansion combined the Edwardian period’s traditional conception of the "femininity" of an intimate interior space with the "masculinity" of the exterior public world.