Food delivery giant DoorDash Inc. is building out two warehouse spaces, one in D.C. and the other in Alexandria, to serve as Greater Washington’s first “DashMart” convenience stores.

Through DashMart, DoorDash (NYSE: DASH) curates convenience, grocery and restaurant items, all of which can be delivered to its customers’ doors within roughly 30 minutes. The “new type of convenience store,” as DoorDash calls it, was launched last August and has since expanded to at least 18 locations.

The average DashMart carries 3,500 items, everything from household essentials, medicine and pet food to snacks, ready-made restaurant meals and packaged spices from local retailers. It also sells at-home Covid-19 tests, through a partnership with Vault Health Inc. and Everlywell Inc.

The first of the D.C.-area locations is a roughly 5,700-square-foot warehouse space at 826 S. Pickett St. in Alexandria. The second is in Capitol Hill, though an exact address was not immediately available. Both…