What Happens During an OSHA Inspection

What triggers an OSHA inspection?

OSHA does not inspect every workplace every year. Federal OSHA and state-plan agencies prioritize inspections based on several triggers, listed here roughly in order of priority:

Imminent danger. Situations where workers face immediate risk of death or serious physical harm receive the highest priority. OSHA can seek a federal court order to shut down an operation if the employer does not voluntarily eliminate the danger.
Fatalities and catastrophes. Employers must report any work-related fatality within 8 hours and any in-patient hospitalization, amputation, or loss of an eye within 24 hours (29 CFR 1904.39). These reports trigger mandatory inspections.
Formal complaints and referrals. Signed, written complaints from current employees or their representatives require OSHA to open an inspection. Referrals from other government agencies, media reports, or observations by OSHA compliance officers driving past a site can also trigger inspections.
Programmed (planned) inspections. OSHA conducts programmed inspections targeting high-hazard industries, including construction. Programs like the National Emphasis Program (NEP) on falls and the Site-Specific Targeting (SST) program direct compliance officers to worksites based on industry injury rates, past violations, or specific hazard categories.
Follow-up and monitoring inspections. OSHA may return to verify that previously cited hazards have been corrected by their abatement deadlines.

Construction sites are among the most frequently inspected workplaces in the country. OSHA's construction-focused emphasis programs target fall hazards (29 CFR 1926, Subpart M), trenching and excavation (Subpart P), scaffolding (Subpart L), and other high-hazard activities.

Can OSHA inspect without a warrant?

OSHA compliance officers do not need an appointment, but they do need legal authority to enter. Under Section 8(a) of the OSH Act, OSHA can enter and inspect workplaces "at reasonable times." However, the Supreme Court ruled in Marshall v. Barlow's, Inc. (1978) that employers can require OSHA to obtain a warrant before entering private property.

In practice, refusing entry is uncommon and carries trade-offs. OSHA can usually obtain an administrative warrant quickly (often within hours), and refusing entry may increase scrutiny. On construction sites, especially multi-employer sites, the general contractor's consent to entry is often sufficient for OSHA to access the entire site. Most employers allow the inspection to proceed voluntarily.

The four phases of an OSHA inspection

Phase 1: Opening conference

The inspection begins with the compliance officer (CSHO — Compliance Safety and Health Officer) presenting credentials and explaining the purpose and scope of the inspection. The CSHO will:

Show official OSHA identification (always verify — you can call the local OSHA area office to confirm identity).
Explain why the inspection is being conducted (complaint, programmed, follow-up, etc.).
Describe the scope — which areas, operations, or standards will be examined.
Explain employer and employee rights during the inspection.
Request relevant records, including the OSHA 300 Log (Log of Work-Related Injuries and Illnesses), the OSHA 300A Summary, training records, written safety programs, and any hazard assessments.

You have the right to have a company representative (an employee, a safety director, or an attorney) accompany the CSHO during the entire inspection. Employee representatives (such as a union steward) also have the right to participate in the walkaround.

Phase 2: Walkaround inspection

The CSHO physically walks through the workplace, observing conditions, identifying hazards, and evaluating compliance with OSHA standards. During the walkaround, the CSHO may:

Photograph or videotape conditions. You can take your own photographs of the same conditions at the same time.
Take measurements (noise levels, air samples, trench depth, guardrail heights).
Review posted notices, safety data sheets (SDS), labels, and signage.
Observe work practices — are workers wearing required PPE, are fall protection systems in place, are excavations properly sloped or shored?
Examine equipment, tools, scaffolding, ladders, and electrical systems.
Identify potential violations of specific OSHA standards.

The employer representative should accompany the CSHO, take notes on everything observed, photograph the same conditions the CSHO photographs, and note any comments or statements the CSHO makes. This documentation is critical if you later need to contest a citation.

Phase 3: Employee interviews

The CSHO has the right to interview employees privately about workplace safety conditions. Employees can choose to speak with the CSHO or decline. Key points:

Interviews may be conducted privately — the employer does not have the right to be present during an employee interview if the employee or the CSHO requests privacy.
Employees cannot be retaliated against for speaking with OSHA (Section 11(c) of the OSH Act). For more on whistleblower protections, see our guide to reporting OSHA violations.
The CSHO may ask about training received, hazards observed, safety program awareness, reporting procedures, and whether the employee has witnessed injuries or near-misses.
Employees can refuse to answer specific questions, but cannot be coached or instructed by the employer to give false or misleading answers.

Phase 4: Closing conference

After completing the walkaround and interviews, the CSHO holds a closing conference with the employer (and employee representatives, if applicable). During the closing conference:

The CSHO describes any potential violations observed and the applicable OSHA standards.
The CSHO discusses possible abatement methods — how the employer might correct the hazards.
The employer can present evidence, explain conditions, or provide context (for example, showing that a hazard was corrected during the inspection).
The CSHO explains the citation process, the employer's right to an informal conference and to contest citations, and approximate timelines.

The closing conference is not the final decision. The CSHO's observations are reviewed by the OSHA area director, who decides whether to issue citations and what penalties to propose. Citations are typically mailed to the employer within six months of the inspection.

Your rights as an employer during an inspection

Employers have clearly defined rights during an OSHA inspection:

Require credentials. Ask to see the CSHO's official identification and verify it with the local OSHA office if in doubt.
Require a warrant. You can decline entry until OSHA obtains an administrative warrant (though this is uncommon in practice).
Accompany the CSHO. An employer representative has the right to be present during the entire walkaround.
Take notes and photographs. Document everything the CSHO documents.
Present evidence. Provide context, show corrective actions already taken, and explain your safety programs.
Request confidentiality. Trade secrets observed during the inspection are protected from disclosure under Section 15 of the OSH Act.
Contest citations. If citations are issued, you have 15 business days to contest them. See our citation response guide for details.

How to prepare for an OSHA inspection

Because inspections are unannounced, the best preparation is ongoing. Contractors who maintain current safety documentation and actively manage hazards are better positioned when a compliance officer arrives.

Documentation to have ready

Written safety program. A current, company-specific written safety and health program that addresses your trade, state requirements, and the hazards your crews encounter. This is the single most important document in an inspection.
Training records. Signed and dated documentation showing that employees have received required training — hazard communication (29 CFR 1910.1200), fall protection (29 CFR 1926.503), scaffolding (29 CFR 1926.454), and any trade-specific training.
OSHA 300 Log and 300A Summary. Current injury and illness logs, properly maintained and posted as required (29 CFR 1904).
Hazard assessments. PPE hazard assessments (29 CFR 1926.95), job hazard analyses, and site-specific safety plans where applicable.
Equipment inspection records. Pre-use inspection logs for scaffolding, fall protection equipment, trenching protective systems, and electrical tools.
Safety Data Sheets. Current SDS for all hazardous chemicals on site, accessible to all employees (29 CFR 1910.1200(g)).

Jobsite practices

Conduct regular self-inspections using the same standards OSHA applies.
Correct identified hazards promptly and document corrective actions.
Ensure all required PPE is available, in good condition, and being used.
Maintain clean and organized work areas — housekeeping violations (29 CFR 1926.25) are among the easiest for a CSHO to identify and cite.
Post required notices, including the OSHA "Job Safety and Health — It's the Law" poster (or state-plan equivalent).

Multi-employer construction sites

On construction sites with multiple employers, OSHA applies its multi-employer citation policy (CPL 02-00-124). Under this policy, OSHA can cite not only the employer whose employees are exposed to a hazard, but also:

Creating employers — the employer who caused the hazard.
Exposing employers — the employer whose employees are exposed to the hazard.
Correcting employers — the employer responsible for correcting the hazard (often the GC).
Controlling employers — the employer with general supervisory authority over the worksite (typically the GC).

This means subcontractors can be cited for hazards they did not create, and general contractors can be cited for hazards created by subcontractors. Understanding your role on a multi-employer site is critical for inspection readiness.

After the inspection

If OSHA issues citations, you will receive them by certified mail. Each citation describes the alleged violation, the OSHA standard violated, the proposed penalty, and the required abatement date. You have 15 business days from receipt to contest the citation, request an informal conference, or accept the citation and pay the penalty. For a detailed guide to this process, see our OSHA citation response guide. For current penalty amounts, see our 2026 OSHA fines and penalties guide.