Expansion of Home

In this dream I was at home and I opened a door near our basement and noticed that our home was being renovated. Various rooms were under construction which my husband and I were unaware. We kept walking through our house in awe of all the various large rooms. We opened the door to one room and lo and behold this massive gym fully built to play basketball. It also had a stage on the other end but the green curtain was closed. At the corner of my eye I saw maybe 5 or 7 teenagers sneaking in to play basketball in our gym. It appeared that they've been sneaking quite a few times. We went outside to check where they were coming from, I couldn't get in through the passage way, but my young daughter could. End of dream.