Whats the rental yield on a SF property? Here in Sydney you are lucky to get gross 4% on an apartment, 3% on a house. It kind of implies that there isn't "too

Whats the rental yield on a SF property? Here in Sydney you are lucky to get gross 4% on an apartment, 3% on a house. It kind of implies that there isn't "too many people" because if so the rents would shoot up too.