With the increase in jobs that can be done from a site that is remote to a central office, more and more people are working at home. Some jobs have always been done by some people from the home -- "cottage industry" work, independent professionals (accountants, writers).
Depending on the type of work, different supplies and workspaces will be necessary. There is a long history of craftwork being done from home. With the Internet, computer and phone based work, there are more jobs that can be done remotely from other workers or customers.
custom craftspeople, office for light construction such as home plumbers, coaching over the phone, editors, workshops -- wood, furniture, small appliance repair