Ms Barton said the couple had held the ceremony early in the morning so their friends could then go to work.
"There was lots of laughs and a few tears. It was very emotional when they shared their vows, it was their opportunity to get treated like everyone else and when they said their marriage vows you could see they really meant it."
Ms Barton has been performing civil unions in Tauranga for a number of years and said it was a privilege to now be able to marry same-sex couples.
"I never thought when I was a teenager at school that we could have same-sex marriage so it's an incredible privilege to think that in New Zealand, like all the other forward thinking countries, our Government has stepped up to acknowledge that and being a part of that absolute dawn of the change is such a privilege."
Ms Barton said she did not expect legalising same-sex marriage would change people's beliefs but hoped it would become more accepted.