Pay close attention to how this works in your town. I accounted an issue in this post.
http://www.winnipesaukee.com/forums/...7&postcount=50
Fully conforming lots merged solely based on configuration and names on the deeds.
The full thread.
http://www.winnipesaukee.com/forums/...ead.php?t=9137
The discussion regarding merging is toward the bottom of the thread.
It sounds peachy, but eliminating non-comforming is not the only reason for merging.