A "carriage house" is a small building or structure where horse-drawn carriages were kept long ago. Nowadays, it can be used to describe a garage or a separate living area built above a garage. Full definition
Property features underground wiring, a separate carriage house with potential for a guest suite upstairs, double car garage & beautifully landscaped grounds. (homelife.ca)
There are five chambers in the main house and three carriage house suites, each of which features antiques, luxury linens, and art. (vacationidea.com)
From this angle you see the main house in the middle, the garage with carriage house on the left and the guest cottage on the right. (homebunch.com)