The phrase "a back area" is correct and usable in written English.
It can be used to refer to a location that is situated at the rear of a space or building, often implying a less visible or less accessible part.
Example: "The storage room is located in a back area of the warehouse, away from the main entrance."
Alternatives: "a rear section" or "a hidden space".
Plans are under way to expand into a back area that will take capacity to about 100.
In a back area Mr. Nelson had begun to stockpile the smaller things he would use to detail the individual rooms.
That I could take my sangria for a walk —and that the walk could lead to a back area with ample elbow room — were pleasing anomalies in space-crunched Manhattan.
An armed man walked into a Jennifer Convertibles store in Bay Ridge yesterday, forced a woman who was in the store into a back area, sexually assaulted her and fled, the police said.
The idea for these sculptures came to Mr. Fig in the late 1990's, when he was living in Brooklyn, and working in a back area of his living room.
One inspector testified that a bouncer told her she could smoke in a back area near an exit door; another said he was able to buy a loose cigarette for $2 from a collection of items for sale in the men's bathroom.
A front dining room with a comfy banquette along one wall and windows opposite it, a larger back area with more space between tables, and a bar in a separate room.
Although Dar Pro pays more for grease than he can afford, he stays competitive by offering personal services, like power-washing a restaurant's back area every time a driver picks up grease.
We recommend using B. as a joiner in the back area".
Lay a tarpaulin in the back area of your car or in the trunk.
Further skin examination revealed a confluent salmon-pink papular eruption on his lower back area and a persistent pigmented plaque on the upper area of his back.
