WASHINGTON — An Obama administration plan to ban indoor smoking at public housing properties has drawn praise from health experts and concern from others who fear violations of the policy would cause some low-income tenants to lose their homes.

A rule proposed Thursday by the Department of Housing and Urban Development would require the nation’s 3,100 public housing agencies to ban lit tobacco products — including cigarettes, cigars and pipes — in all homes, indoor common areas and administrative offices in their developments.

Smoking is already banned through voluntary policy in more than 228,000 of the nation’s nearly 1.2 million public housing units. The new proposal, if finalized, would expand the no-smoking rule to the remaining 940,000-plus units.

“We have a responsibility to protect public housing residents from the harmful effects of secondhand smoke, especially the elderly and children who suffer from asthma and other respiratory diseases,” said a statement by HUD Secretary Julian Castro.

In addition, secondhand smoke causes hundreds of newborns to die each year from Sudden Infant Death Syndrome, the surgeon general estimates.

“Affordable and healthy housing should not be mutually exclusive and this proposed rule helps to ensure that residents in public housing can breathe smoke-free air where they live,” said a statement from Chris Hansen, president of the American Cancer Society Cancer Action Network.

Banning smoking in public housing would save the federal government $153 million a year, according to a 2014 study by the Centers for Disease Control and Prevention.

Most of the money — $94 million — would come from declines in tobacco-related health care. Another $43 million would be saved on the renovation of units where smoking was allowed. Declines in smoke-related fire damage would save $16 million, the CDC estimated.

Although she had not yet read the proposal, Sheila Crowley, president and CEO of the National Low Income Housing Coalition, said her group supports the proposed smoking ban. But she’s concerned the rule could be used to evict violators.

“Our only concern is that there be enough protections and help, especially for people with mental illness or elderly people that have serious tobacco addictions, that they don’t end up losing their homes as a result of this,” Crowley said. “Some of our members who are public housing residents are very worried about this.”