store·front 
(stôrfrŭnt′)
(stôrfrŭnt′)n.
1. The side of a store or shop facing a street.
2. A room or suite of rooms in a commercial building at street level: a political office in a storefront.
adj.
1. Of, relating to, or being that side of a store facing a street: storefront window boxes.
2. Operating in a room or suite of rooms in a commercial building at street level: a storefront lawyer.