Shaw Builders had now won 54 awards, but this was the one Mr Shaw had been aiming for since first entering eight years ago.
"This is just the top of everything we've won, and something I've always wanted to win.
"We didn't go up there expecting to win, we just thought 'whatever happens, happens'. I couldn't believe it when we won, it's a bit like winning Lotto - but way better, because it's something we've worked hard to achieve."
As well as winning the House of the Year title, Shaw Builders also took out the Craftsmanship Award and the Westpac New Home over $2 million category.
Judges said Shaw Builders must congratulate themselves for their fantastic results.
"The well-designed upper-level outdoor area can be closed off from the prevailing winds with strategically-hidden sliding doors and a remote-controlled louvered roof.
"The luxurious ambience upstairs is complemented by a stunning, large gas fireplace."
The judges said another standout feature was the ensuite, with its polished marble tiling offset against dark-stained cabinets enriching the light-filled space.
"This large, elegant home is well-balanced with a superb palette of materials, and has been designed and built for comfortable living," judges said.
" ... A beautifully-crafted home that meets the needs of its owners."
Registered Master Builders 2015 House of the Year results
Supreme Award for the Registered Master Builders 2015 House of the Year:
Shaw Builders for a home in Mt Maunganui, Bay of Plenty.
Supreme Award for the Registered Master Builders 2015 Renovation of the Year:
Glover Homes for a home in Albany, Auckland.