When did garages get built as part of houses? It really started in the 1940s when cars replaced horses as transportation. Before that carriage houses and barns are located separately - when one looks at the older heritage homes in Grimsby that's what is apparent. Somehow garages brought to mind the 1954 movie, Sabrina with Audrey Hepburn, where the "garage" figures large in the beginning plot of the movie:
"Sabrina Fairchild is the young daughter of the Larrabee family's chauffeur, Thomas, and has been in love with David Larrabee all her life. David, a three-times-married non-working playboy, has never paid romantic attention to Sabrina. Since she has lived for years on the Larrabees' Long Island, New York, estate with her father, to him she is still a child.
Eavesdropping on a party at the mansion the night before she is to leave to attend the Le Cordon Bleu cooking school in Paris, Sabrina watches, follows, and listens as David entices yet another woman into a dark and vacant indoor tennis court. Distraught, she leaves her father a suicide note and then starts all eight cars in the closed garage in order to kill herself. She is passing out from the fumes when Linus, David's older brother, opens the door, discovers her, and carries her back to her quarters above the garage when she does pass out."
The plot seems amusing with a nod towards royal family dealings: David's serious older brother, Linus, who runs the family business is relying on David to marry an heiress in order for a crucial merger to take place.
By the 1950s, North Americans became car owners with their garages. Our own 1950s built house had a breezeway between the house and garage. Of course, a garage for one car
Here's a picture from our trip to Cuba, with Gerry boarding a steam engine.