The Dutch midfielder is said to have penned a pre-contract agreement with the MLS club ahead of his Hamburg deal expiring in the summer.
Van der Vaart, 32, has reportedly signed a pre-contract for a two-and-half seasons with Sporting Kansas City and will head across the Atlantic once his current deal with Hamburg expires on June 30.
Sporting KC’s interest in the Dutch midfielder has been no secret over recent weeks, with club officials travelling to Europe earlier this month for talks over a potential move, where Bild claimed that a €4.3 million-per-season offer was put on the table.
Speaking to MLSSoccer.com following the meeting, SKC CEO Robb Heineman said: “If we can get that done, we'd like to get it done. He'd be a July move – maybe earlier. I don't know if Hamburg would let him out early. There's a lot of things to work out with him.
“It isn't a money issue. It's more around some family things. He's got a son in Hamburg, obviously, and he's got a father who travels to a lot of his games, and so we've got to accommodate some of those things.
“So if we can work those things out, we'll have him.”
Head coach Peter Vermes also addressed Van der Vaart’s potential arrival earlier this week, confirming to the Kansas City Star that the pair had been exchanging text messages but that no significant progress had been made towards a deal.
Things look to have taken a major step forward since, provided the most recent reports are to be believed, with the move proving a potential coup considering the likes of Roma and former club Ajax were also linked to the ex-Real Madrid man’s signature.
Returning to Hamburg from Tottenham in August 2012, following a previous spell between 2005 and 2008, Van der Vaart has since scored 18 times in 78 total appearances for the Bundesliga side, while also adding 21 assists.
Named club captain for a second time in April 2013, the Netherlands international has grabbed five goals in 20 games this season from a deeper midfield role, despite struggling with a nagging calf problem, but is now seeing his first-team minutes reduced ahead of his expected departure.
His creative qualities would no doubt prove a huge boost to Sporting KC’s hopes of adding a third MLS Cup title to those won 2000 and 2013 and, given all that’s been reported thus far, there is good reason to believe that a deal is happening.