We are doing a lot of restoration work on our property and I know that we will have to replace the bird house soon but I hate to as well. I love the antics of the sparrows. We can have as many as two or three perched on the roof of the house; they appear to be vying to get in the house. One plucky one always sits there (not unlike one of our dogs guarding a toy) and won't leave the house until the "coast is clear".
Clearly possession is 9/10ths of the law in the ornithology world too!
Have a great day!