They're all things that happened recently and/or which have an impact on the present situation: the building now exists, the wife now has a new dress, and I know about the restaurant. What we don't know, and what perhaps doesn't matter, is precisely when these things happened - if we indicate when they happened we use the past simple instead.

In grammar books, they talk about four concepts associated with present perfect tense: 1. continuation: I have been working for two hours. 2. completion: He has finished his homework. 3. result: He has ruined it. 4. experience: I have been to France. Your sentences may be classified similarly: 1, The building has been constructed - completion & result (the building now exists). 2, My wife has just bought a dress from the building - result (she has the new dress). 3, I have heard of a restaurant here - experience.