Most of the time when you buy a property, especially one in a subdivision there are restrictions on how you can use that property. When you buy your new home you will receive a document known as the Covenants Conditions and Restrictions. Most people call them the CC&R's.
This is not the same as a Homeowners Association (HOA). The CC&R is set up by the local jurisdiction, either city or county usually when land is subdivided. They will spell out just what you can and can't do with the property.
The CC&R's will spell out what type of businesses can be operated from your home. (Hint: no night clubs or places where intoxicating beverages are sold.) That was actually in the CC&R's in my last sale. You may not be able to park your work vehicle in front of your new home either. Motor homes and Recreational Vehicles might be an issue too. Don't even think about putting up a sign in front of your house in most neighborhoods, unless it's my sign when you want to sell.
It will also let you know what kind of animals are ok to have. So you better check to see if your llama is welcome in the neighborhood. Most CC&R's are ok with your typical house pets like cats and dogs. Some neighborhoods with larger lots may even be ok with a horse or even your llama.
There may also be easements on your property for local utilities for access to gas lines, water lines, cable TV, etc. This is something to look into if you are thinking about re-doing the landscaping after you move in. You don't want to plant some expensive trees only to find out later that the local gas company will have to tear them out to access the gas lines.
Overall CC&R's are meant to keep your new neighborhood from changing drastically from what you thought it was when you bought your new home. After all you don't want to move in and six months later have to deal with loud drunken llamas every night.
But seriously most Covenants Conditions and Restrictions are not that onerous and overall are a good thing for you and your neighbors. Every jurisdiction is different and you may not even have any CC&R's. Just be sure to read the document before you buy your new home!