A Chinese restaurant has been ordered to take down an oversized black fascia board.
Days, in East Street, Brighton, put up the fascia with some red formica cladding at the old ABC cinema building in East Street.
Now, planning enforcement officers from Brighton and Hove City Council have stepped in, issuing an enforcement notice.
They also pointed out that the restaurant had replaced two of the original door openings, converting them into single windows without planning permission.
Councillor Lynda Hyde, chairman of the council’s planning committee, said: “I am pleased that officers are taking this action as the work that has been done without planning permission is totally unsympathetic to the building and has had a detrimental visual impact on the surrounding area.
“It is never a good idea to undertake work without planning permission and this is especially important in conservation areas.
“I would urge anyone considering alterations like this to take advantage of the free advice of our planning team.”
The Art Deco building is in the Old Town Conservation Area.
It opened as the Savoy Cinema Theatre in 1930 and became the ABC in 1963. In the final years before its closure it was renamed the Cannon.
In the autumn the council’s Food Safety Team named Lian Jun Feng, who runs Days, as Brighton and Hove’s Chinese Chef of the Year.