Giles Baugh, 34, got down on one knee inside Ladder 8 in New York's Tribeca district in Manhattan to ask for Melissa Ward's hand in marriage.
Many of the most famous scenes from the movie franchise were shot there and Giles is a massive Ghostbusters fan.
But he says he needed help to get inside the fire house because it's currently closed for renovations.
"The fire house is a working fire station and nobody's allowed in there," he told Newsbeat after arriving back in the UK.