The defender had been close to joining Southampton earlier this summer before a move to the newly promoted Premier League club fell through.
The 23-year-old, who was close to joining Southampton earlier this summer before a move fell through, has been identified by United manager Sir Alex Ferguson as the man to provide Patrice Evra with competition on the left flank at Old Trafford.
United has also been targeting Leighton Baines this summer. However, Everton value the England international at 17m pounds, which has prevented Ferguson from landing the left back. But Buttner, who was in Netherland's preliminary Euro 2012 squad, has conceded a move to Old Trafford is now close.
"This is really a dream come true," he told Dutch TV station Omroep Gelderland. "It was all arranged very quickly and of course I am very delighted. Happily everything is coming to an end."
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