"coal cellar" is a correct and usable phrase in written English.
It refers to a small room or space used for storing coal. Example: The old Victorian house had a damp and musty coal cellar in the basement, where the previous owners had stored their fuel for the fireplace.
For six weeks he slept in a coal cellar.
He visits the coal cellar where he was held prisoner and describes his escape.
The next year, he found a wreck of an old coal cellar and, with friends, built a bar.
There's an old open-frame lift and breakfast is served in the stone-walled former coal cellar.
I'm still fascinated with Hitler and Churchill and Mickey Mouse and the war and living down in the coal cellar.
And I said, "Well, he locked you in the coal cellar". She was amazed at my over-reaction.
In the final days before the Soviets entered Budapest, his subterfuge was discovered and he was imprisoned in a coal cellar to await execution.
At the stores, three of them made their way to trap doors covering chutes to the coal cellars.
Recent drillings have been made easier because the homeowners, having inherited old coal cellars, also had rights to the sidewalk.
The basement boom began in the late 1990s in Hammersmith and Fulham and Wandsworth, according to architects and developers, with middle-class families renovating their Victorian coal cellars.
The shrewd Copland had noted the growing need in London for small-scale residences within walking distance of St. James's and its clubs and the Houses of Parliament, where a country gentleman with no desire for an elaborate dwelling in town could feel at home, with his own wine and coal cellars down below and a modest billet for a valet upstairs.
