The D.C. Council is eyeing an extension of the city’s anti-tobacco prohibitions into public space, allowing all private property owners to ban smoking outside their buildings — including the public sidewalk.

The proposed legislation, a major expansion of the District’s smoke-free law, sets 18 as the legal age to purchase or possess tobacco products, requires retailers to post signs warning of the dangers of smoking, ramps up enforcement of sales to minors and authorizes smoking bans up to 25 feet from the wall of any private property — residential or commercial.