Charles III is also interested in architecture. He has established several institutions, dealing with the issue of urban planning and architecture, which, as of 2018, form The Prince's Foundation.

In 1989, he published the book: A Vision of Britain: A Personal View of Architecture, in the pages of which he included his personal views and thoughts on the architecture of Britain. He has also written articles in professional journals such as The Architectural Review, which published his design concepts on December 20, 2014.