The answer to your dream question is yes, it usually does mean that it is a good or "happy' result, but on another note, it also may mean that there are indeed hidden symbols, depending on the dream content.

The dream about the two homes is very interesting and to me suggests that you may be growing and on a life journey of discovering who you are.
House in dreams as you probably already know represent us and all the rooms in them represent aspects of who we are.

Your older house may be the old you, the person that is influenced by who raised you, family tradition, and how you developed from a child on up.

The new house is the new you, the new person you are becoming and how you grow in each trait or "lessons learning" type of experiences.

You never being afraid to explore the older house is a very symbol showing you are brave and strong, and will do what it takes in your waking life to overcome, to learn to grow. Very commendable attribute.

Knowing the layout in your new house, can be showing that you have laid the foundation already, which is also very good because as we all know a house without a solid foundation will not stand very long or very strong when the storms in life come our way right?

Does this make sense?
Please let me know if you have any questions, I am happy to help. Thank you and blessings to you.