Abstract: A glass height adjuster for a sunroof assembly using a mounting bracket extension adapter. The present invention can include an extension adapter having a countersunk first opening on the lower portion, a second opening in the upper portion spaced a predetermined distance from the first opening to compensate for a vertical variance of the mounted movable surface to a vehicle roof; and the bracket configured to be placed and attached between a sunroof mounting bracket and a sunroof mechanism arm, whereby function of the movable surface is maintained. Additional features can include a lip on a lower edge to conform to a lower edge of the mechanism arm, or a tab to retain the mechanism arm from a first and second side of the mechanism arm.