<p>Try posting this with a title along the lines of “Accepted in Materials Science, but now I think I want Architecture, what do I do?” in the Parents Forum. You might get some ideas there.</p>
<p>Why don’t you just pick up the telephone and call the architecture departments and ask how difficult it will be for you to make an internal transfer from engineering to architecture? It may be impossible - in which case a gap year would be your only option. It may not be very hard at all. But you won’t know until you ask.</p>