Twin garages have many uses, including vehicle storage, general storage, and space extension. While car storage is by far the most common use for twin garages (Doppelgaragen) , many people are surprised to learn how many alternate uses a garage can have. Apart from car storage, domestic storage is probably the most common use for modern garages, with people storing all sorts of things in the backs of their garages. Some of the things you are likely to find in the back of a garage include sporting equipment, tools, toys, old clothing, and family treasures. Some people use an entire side of their double garage for general storage, and keep the other side dedicated to their car.

Twin garages are available in many varieties, with brick garages and prefabricated steel garages especially popular throughout the world. However, garages can also be made from timber and other materials. Along with storage, garages are also often used in home conversions, where owners turn them into something else altogether. Twin garages can easily be transformed into living areas, entertainment areas, and working areas, sometimes with nothing more than a coat of paint and a little furniture. Traditional garages that are made from bricks and mortar are especially good for home conversions, because they can stay warm and comfortable for the people inside.

Many people who work from home transform their garage into a dedicated work area, with home offices and warehouse areas both popular choices. Garages offer a number of advantages when they are used for this purpose, including weather proofing and security. Many garages come with locking mechanisms and dedicated security systems, making it a trivial task to lock away your possessions and keep them safe when they are not in use.