I think I heard somewhere when I bought my home that we weren't allowed to add any permanent (concrete foundation) fixtures on my property, such as a shed on a concrete foundation. Well, adding a bedroom to my home would do exactly this, does anyone know who I can contact to find out if this is even allowed? Such as maybe an official city agency of some sort?
Building regulations are generally controlled by either
Start with the first. Most often there is a planning or zoning office that regulates both commercial and residential construction.
Or you could consult a local builder and ask him or her what permissions you need (but double check any answer that you get; some unscrupulous builders will say you don't need any, and post construction, you may have a problem).