"It was always possible that this club could go all the way," Ashbee told Hull's website. "In fact, I knew it would, but I didn't realise it would happen as quickly as it has done.
"Nobody can take it away from us now. We didn't finish third in the table through luck and we deserve to go up.
"Next season will be a challenge for all of us, but it's one I'm desperate to do."