California No Smoking Sign Requirements: Wording, Placement, Fines

California’s no smoking sign requirements come primarily from Labor Code 6404.5, which bans smoking inside every enclosed workplace in the state and lists posted signage as the first step an employer must take to show compliance. The sign has to be clear and prominent, has to appear at each entrance, and has to carry one of two specific messages depending on whether smoking is banned throughout the building or only outside designated areas. Fines start at $100 and climb from there.

What the Sign Must Say

The statute keeps the content requirement short. A compliant sign reads one of two ways:¹

“No smoking” if smoking is prohibited throughout the building.
“Smoking is prohibited except in designated areas” if the policy allows smoking in specific zones.

That is the full content mandate. The law sets no minimum size, no required colors or fonts, and no legal requirement for the international no-smoking symbol (the red circle and slash over a cigarette), despite the common assumption that the symbol is required.² Including the symbol and sizing the sign so it reads from several feet away is sensible practice, but neither is written into the statute.

State law also does not require bilingual signs. Many California employers post English and Spanish text anyway, which helps show a real effort to communicate the policy to everyone on site.

Where to Post the Signs

In workplaces where smoking is banned throughout the building, a “No smoking” sign goes at each entrance.¹ Each entrance means every point of entry: front doors, side doors, loading docks, garage entrances. Missing one door weakens the argument that you took reasonable steps to prevent smoking on the premises.

Position matters too. A sign tucked behind a swinging door or placed near the floor is unlikely to meet the “clear and prominent” standard. Put signs where people will see them before they walk in.

Employer-owned or leased enclosed vehicles that function as a workplace, such as a company van used for daily operations, also need a no-smoking sign when a nonsmoking employee is present inside.³

Public buildings have an extra wrinkle. Under Government Code 7596–7598, a public building is any building owned or leased and occupied by the state, a county, a city, a city and county, or a California community college district. Smoking is banned inside, and also within 20 feet of any main exit, entrance, or operable window. Signs must cover both the indoor rule and the 20-foot outdoor buffer. If an agency wants to ban smoking in any outdoor area beyond that 20-foot zone, a sign describing the extra restriction has to be posted before the ban can be enforced.⁴

Buildings and Spaces That Need Signs

The workplace rule reaches further than most owners expect. Labor Code 6404.5 applies to every enclosed space at a place of employment, including traditional offices, restaurants, retail stores, warehouses, and owner-operated businesses with no employees at all. Enclosed space includes lobbies, elevators, stairwells, waiting areas, covered parking garages, and restrooms that are structurally part of the building.¹

Common areas of apartment buildings and condominiums fall under the same workplace rule whenever employees work in those spaces: maintenance staff, property managers, front-desk attendants. In those shared areas, standard workplace sign requirements apply. Local ordinances in many California cities go further, requiring no-smoking signs in shared residential spaces whether or not employees are present, so check your city or county rules before deciding what to post.

E-Cigarettes and Vaping Count as Smoking

This is the detail that catches business owners off guard. California’s workplace statute defines “smoking” by reference to Business and Professions Code 22950.5, which covers any device that delivers nicotine or other substances through vaporization or aerosolization.¹ Government Code 7597 uses the same definition for public buildings.⁴ A “No smoking” sign therefore covers vaping as a matter of law.

In practice, few people read “No smoking” as applying to a vape pen. Many employers add explicit language such as “No smoking or vaping” or “No smoking, including electronic cigarettes.” The statutory text is enough for technical compliance; the added phrase is what actually prevents violations.

Workplaces Not Covered by the Ban

If the ban does not apply to your workplace, the sign requirements do not either. Labor Code 6404.5 exempts a narrow list of settings:¹

Tobacco shops and attached private smokers’ lounges, where the main purpose of the business is selling tobacco products. A restaurant that happens to sell cigars does not qualify.
Truck cabs and truck tractors, only when no nonsmoking employees are inside the vehicle.
Theatrical productions where smoking is an integral part of the story being performed.
Medical research or treatment sites where smoking is integral to the research itself.
Private residences, with one exception: homes licensed as family day care facilities must still comply.
Patient smoking areas in long-term care facilities.

These carve-outs are narrow by design. If your business does not fit squarely inside one, assume the full posting rules apply.

Fines for Missing or Noncompliant Signs

Enforcement falls to local agencies, usually health departments and in some cities fire departments. A violation is an infraction, and fines escalate for repeat offenses within a one-year period:³

First violation: up to $100.
Second violation: up to $200.
Third and later violations: up to $500.

Cal/OSHA enters only after an employer has been found guilty of three violations by local agencies within the previous year. At that point Cal/OSHA can investigate complaints and issue its own citations, which carry much steeper penalties: up to $7,000 for a general or serious violation and up to $70,000 for a willful serious violation, according to the Department of Industrial Relations.³ Cal/OSHA’s penalty schedule is adjusted periodically, so current maximums may be higher than those baseline figures.

Why Posting the Sign Is Also Your Defense

Compliant signage does more than check a box. The statute specifically lists sign posting as the first of the “reasonable steps” an employer must take to avoid liability when a nonemployee smokes on the premises.¹ Signs alone will not clear you; you also have to ask violators to stop. But signs at every entrance, carrying the correct statutory text, are the foundation that any defense against a citation builds on.

1
California Legislative Information. California Labor Code 6404.5
2
Department of Industrial Relations. California Code of Regulations Title 8 5148 – Prohibition of Smoking in the Workplace
3
Department of Industrial Relations. California Workplace Smoking Restrictions
4
California Legislative Information. California Government Code Chapter 32 – Smoking in Public Buildings