What's the Name of That Book??? discussion

This topic is about
The Thief of Always
SOLVED: Children's/YA
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SOLVED. Boy Ends up in House that is Alive and He Cannot Leave [s]
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The boy and girl try to find a way out of the house, and end up in the attic, where they discover that the house itself is alive. Somehow, they successfully leave and the house is destroyed. Beyond that, the ending is very hazy. There was possibly a time lapse involved, as my wife seems to remember the "kids" coming back later as adults to find that the house is gone. Or, the kids came back to the real world to find that time had passed and though they were still children, their parents/families had passed on. Again, my wife is pretty hazy on the ending, but she is sure that somehow, the boy and girl meet again after escaping the house.
This book most likely came out between 1990 and 2000; possibly earlier, but not much. It was intended for middle grades/juvenile readers.