Though the toy breeds are always a good choice for apartment dwellers, any dog breed, given the proper amount of exercise, can live comfortably in an apartment. Many breeds have comparatively low exercise requirements, according to the World Atlas of Dog Breeds, 6th Edition, while others are small enough to get enough exercise indoors or from a brisk walk. That said, all dogs need exercise, not to mention bladder relief, so always plan to let your dog out of the house several times a day.
The Boston has been nicknamed "the American Gentleman" because of his dapper appearance, characteristically gentle disposition, and suitability as companion and house pet. They require only a moderate amount of exercise and a minimum amount of grooming. The breed is easy to train and they are easy keepers, preferring to remain by their owner's side.
Chihuahuas are alert dogs with terrierlike qualities. They are good with families if the children are gentle and patient. Because of their small size, they require little exercise and are good city dogs, but can be sensitive to cold temperatures. Smooth-coated Chihuahuas need very little grooming due to their short hair. Long coats need occasional brushing but still require minimal grooming.
An affectionate and devoted family companion, the Japanese chin loves everyone it is familiar with, but may be reserved around strangers and in unfamiliar situations. Their small size makes them ideal for an apartment, but they still enjoy the opportunity to play in an open yard.
A very intelligent breed, the Tibetan spaniel thrives on human companionship and needs to be with its people. Although outgoing and friendly, the breed may be aloof with strangers. Tibbies need only moderate exercise, so they are excellent in apartments. Their double coats need weekly brushing.