garden shed

garden shed (plural garden sheds)

1. A toolshed in a garden or allotment, holding gardening equipment.
2. (usually attributive) Homespun; mom-and-pop.

   garden shed inventors

   Whether you call them garden shed inventors or backyard innovators, they've made big contributions to gross national income on both sides of the Atlantic.

• “garden shed” (US) / “garden shed” (UK) in Macmillan English Dictionary.