There are many small business ideas that can be started with just one room. Some examples include starting a home-based daycare, offering virtual tutoring or coaching services, creating and selling handmade crafts, starting a small online retail business, offering freelance writing or editing services, or providing pet-sitting or dog-walking services. Other ideas include starting a home-based catering business, offering personal training or fitness classes, or starting a small photography or videography business. With a little creativity and some hard work, it is possible to turn a spare room into a successful small business.