Most governing documents require owners to get approval before changing a home's exterior. The request goes to an architectural review committee (often called the ARC) or to the board, which compares it with the community's architectural standards.
Good review is fast, consistent and written down. Many governing documents and some state laws set a deadline for a decision, and some say a request that isn't answered in time is deemed approved, so tracking each request's date matters.
Decisions should cite the specific standard they rely on, and a denial should explain what the owner could change to get approval.