The reason that I asked is that a single new race might be a bullet point to list (or a few bullets if listing subraces), but a page or two in terms of reading. Meanwhile a new class w/subclasses might be a few bullet points to list the class and subclasses, but range from several pages of reading to twenty or more depending on the number of new subclasses and spells (if any). In such cases, do we go by the space to list or the actual pages of reading?Maybe? When I think of house rules it's more along the lines of the common "potions take a bonus action to use" and similar. Literally changing the rules of the game. But sure, a list of banned races, classes, feats, spells, etc could be considered a house rule. Likewise a list of allowed third party stuff. For the purposes of this, I'd consider the whole of that (banned, allowed, etc) as 1-2 house rules. Either one or all of that as a whole or one for the list of banned stuff and one for the list of third party stuff.