"I was hitting the ball alright but I was just missing all of my putts at the start. A few of them dropped in at the end coming home, which was good."
Lee, one of New Zealand's top amateur golfers, was uncontainable in his charge home.
"I was hitting the ball quite well so I knew with the three par-fives coming up that I would have a chance of making a few birdies and I did," he said.
"It is great to add my name to this trophy alongside the many great names who have won it before me."
Winners of the New Zealand U19 title include the likes of Greg Turner (1981), Michael Campbell (1987), Michael Long (1988), Adam Scott (1996), Steven Bowditch (2000) and Jason Day (2004).
Lee also won the North Harbour Stroke Play recently, meaning he has won four tournaments this year alone.
Lee said his next tournament would be the Asia-Pacific Panasonic Open in Japan, his biggest tournament to date.
"This win has helped a lot, confidence wise. I did not come into it feeling too good about my swing but it went really well."
He said winning competitions built a lot of self belief for the future, especially leading into big tournaments like the Panasonic Open.
"You feel more confident about your game."
His coach Gavin Holder said Lee was a very consistent player on the course, hitting a lot of greens in regulation and driving well off the tee.
"That is probably his biggest strength that he is always down the middle," he said.
Holder said Lee was given the nickname of "boring" by his golfing friends, simply because he always hit down the middle and gave himself a good shot at the green.
Holder said he believed Lee could make it as a pro.
"The feedback I get about him from a lot of professionals is he has the ability to get it done when he needs to," he said.
"He turns it on and can make a lot of birdies when he has to."
Lee will return to Rotorua this weekend where he will spend three weeks practising before leaving for Japan.
It is expected Lee may turn professional as early as the end of the year.
