The Crystal Palace prodigy is enjoying a fine season in the Championship and has been tipped to make a move in January.
Zaha has four goals in his past two matches and there is mounting interest in the England Under-21 international.
A fee of around £11m has been mooted for a January departure but Palace boss Freedman reckons his starlet is worth a lot more than that.
He said: "I know he is worth more than £11m. You're getting him cheap if you get him for that.
"Wilfried has dedicated himself to the game and is heading in the right direction. We give young players the chance to play and that's what he is doing now.
"It's a matter of time until he plays in the Premier League and let's hope that is with Crystal Palace.
"As we speak right now he's on a long contract and he's very happy."