Yes it is.
Yes, "low-to-intermediate" should be hyphenated when used as a compound modifier before a noun.
A hyphenated modifier is a compound adjective or adverb created by hyphenating multiple words together that work as one word. Example: He gave me that there's-a-dead-body-in-my-fridge sort of smile.
No, "great grandparents" is not hyphenated. The term is used to refer to the parents of one's grandparents and is typically written as two separate words. Hyphenation is not necessary in this case, as "great" functions as a modifier without needing to be connected to "grandparents."
"Tomorrow" is not typically hyphenated. However, in some specific contexts where it is used as a compound modifier before a noun (e.g., "tomorrow-morning meeting"), it may be hyphenated.
"Fired up" is one of those phrases that is hyphenated when it is used as a modifier preceding whatever it is modifying, but not hyphenated when it is used as a predicate adjective. For example, if you say "Everyone was fired up about the new project", "fired up" is a predicate adjective and not hyphenated. However, if you refer to someone's "fired-up speech", "fired-up" is a modifier that precedes "speech" and is therefore hyphenated. Using "fired up" as a predicate adjective is more common.
No, "run of the mill" is not hyphenated. It is an idiomatic expression that means something is ordinary or average. When used as a modifier before a noun, it should be written as "run-of-the-mill."
Yes, "heart-breaker" is a hyphenated modifier. It combines the words "heart" and "breaker" to create a single adjective that describes someone or something that causes emotional pain or heartbreak. The hyphen helps clarify that the two words work together as one concept.
No, "off guard" is typically not hyphenated when used as an adjective before a noun, but it can be hyphenated when used as a compound modifier. For example: "She caught him off guard" vs. "He was caught off-guard."
No, "building wide" is not hyphenated. It is used as a compound adjective to describe something that spans the width of a building, but it does not require a hyphen when used in this context. However, if used as a modifier before a noun, it is often hyphenated as "building-wide."
Yes, "overall" is typically not hyphenated when used as an adjective or adverb. For example, you would write "the overall quality" or "overall, the results were positive." However, if used as a compound modifier before a noun, such as "overall-performance evaluation," it can be hyphenated for clarity.
Copay is a relatively recent term. It is not hyphenated. In general, short words like this are not hyphenated.
The term multistory (UK multistorey) are apparently not hyphenated.