Full Window Replacements: Architect or Interior Designer or None

[John Pneumonic]

The selling point of a new foreclosed flip house I'm working on is the land so I'm looking to install new, modern windows that brings in more light and provides better views of the backyard. I'm using a General Contractor but wondering if this type of thing would normally require an architect even if it's of the utmost importance that I do not do anything to the house that would require building permit/approval. Any advice would help.