I think most people would call that “the middle of nowhere” or out in the boonies... or it could be a new area that is growing.. 15 miles from groceries is too far to be called a suburb
Not in the US. In the US "in the middle of nowhere" is grocery runs of 50+ miles. 15 miles is a "far out" suburbian hellscape e.g. https://i1.wp.com/cdn-images-1.medium.com/max/1080/1*AEfVhyv... or https://bostonglobe-prod.cdn.arcpublishing.com/resizer/h2N-h...