Construction (29 CFR 1926)

General Requirements for Confined Spaces in Construction

Verified vs OSHA sources · 2026-10-05

29 CFR 1926.1203

29 CFR 1926.1203 is the general requirement of Subpart AA, OSHA's construction confined-spaces standard: before work begins, a competent person must identify all confined spaces where workers may enter and determine which are permit-required confined spaces, so the site knows where the atmospheric, engulfment, and configuration hazards are.

29 CFR 1926.1203 at a glance

What it requires: A competent person to identify all confined spaces and permit spaces before construction work
Who it covers: Construction employers whose workers may enter confined spaces (Subpart AA)
Identification rule: A competent person identifies all confined and permit spaces before work begins (1926.1203(a))
Key duty: Evaluate spaces (with testing), then control permit spaces with permits, testing, attendants, and rescue
Max penalty (2026): $16,550 per serious violation; $165,514 per willful
The #1 confusion: Construction has its own confined-space standard (Subpart AA), distinct from general industry's 1910.146

What 29 CFR 1926.1203 requires (plain English)

29 CFR 1926.1203 is the general requirement that opens Subpart AA, OSHA's dedicated confined-spaces standard for construction, issued in 2015. It establishes the first and most important step: identifying where the confined-space hazards are before anyone works near them.

Before work begins at a worksite, each employer must ensure that a competent person identifies all confined spaces in which one or more of the employees it directs may work, and identifies each space that is a permit-required confined space, through evaluation of the space's elements, including atmospheric testing as necessary. If the site has permit spaces, the employer must either prevent entry or develop a permit program with the standard's protections: atmospheric testing, entry permits, an attendant, an entry supervisor, and rescue arrangements. The standard also emphasizes coordination among multiple employers on a construction site and continuous atmospheric monitoring where possible.

1926.1203 gave construction its own confined-space framework (Subpart AA, 1926.1201 through 1926.1213), parallel to but distinct from general industry's 1910.146, reflecting the transient, multi-employer nature of construction sites. It works with the excavation standard (1926.651), since deep trenches can present confined-space atmospheres, and the respiratory and rescue provisions.

The regulatory text

“Before it begins work at a worksite, each employer must ensure that a competent person identifies all confined spaces in which one or more of the employees it directs may work, and identifies each space that is a permit space, through consideration and evaluation of the elements of that space, including testing as necessary.”

29 CFR 1926.1203(a)

Key facts about 29 CFR 1926.1203

Before work, a competent person must identify all confined spaces and each permit space (1926.1203(a)).
Identification includes evaluating the space's elements, with atmospheric testing as necessary.
Permit spaces require permits, atmospheric testing, an attendant, an entry supervisor, and rescue.
Construction has its own confined-space standard, Subpart AA (2015), distinct from 1910.146.
The standard emphasizes coordination among the multiple employers on a site.
Continuous atmospheric monitoring is emphasized where possible.
It works with the excavation standard, since deep trenches can present confined-space atmospheres.

Scope: who 29 CFR 1926.1203 applies to

Regulatory framework: Construction (29 CFR 1926)
Citation reference: 29 CFR 1926.1203
Enforcement status: In force and enforced
Jurisdiction: Federal OSHA (29 State-Plan jurisdictions may be stricter)

State-Plan states (e.g. California, Washington, Michigan) operate OSHA-approved programs that must be at least as effective as federal OSHA and frequently impose higher penalties or additional requirements. Confirm the rule as adopted in your state.

Key requirements of 29 CFR 1926.1203

#	Employer obligation
1	Evaluate workplace for confined spaces
2	Test atmosphere before entry
3	Provide ventilation and hazard controls
4	Station attendant at each entry point
5	Arrange rescue services
6	Coordinate with other employers on multi-employer sites
7	Issue entry permits

Summarized from the text of 29 CFR 1926.1203. Always read the full regulation for the binding language.

Common Confined Spaces General (Construction) violations

Deficiencies OSHA cites under 29 CFR 1926.1203 include the ones below, in no particular order. Distinct deficiencies can be cited as separate items, and each serious item carries up to $16,550 (2026). Broader per-instance stacking exists but is a discretionary, case-by-case OSHA enforcement policy, not an automatic multiplier.

No competent-person identification of confined and permit spaces before work (1926.1203(a)).
Permit space entered without a permit, testing, attendant, and rescue: 1926.1204 / 1926.1211.
No atmospheric testing before and during entry (1926.1204).
No coordination among multiple employers on the site (1926.1203(h)).
Applying general-industry 1910.146 instead of Subpart AA to construction (1926.1203).

Construction has its own confined-space standard: Subpart AA, not 1910.146

A common mistake is applying the general-industry confined-space standard (1910.146) to construction. Since 2015, construction has its own standard, Subpart AA (1926.1201 through 1926.1213), and 1926.1203 is its general requirement. The core concepts are similar (identify confined spaces, determine which are permit-required, and protect entrants with testing, permits, attendants, and rescue) but Subpart AA adds requirements suited to construction, such as coordination among the multiple employers on a site and an emphasis on continuous monitoring. Using the wrong standard, or skipping the up-front competent-person identification, is what leaves workers entering hazardous spaces unassessed.

What OSHA inspectors look for

A compliance officer asks how the employer identified the site's confined spaces and which are permit-required, checks that a competent person did the evaluation (including testing as necessary), and that identified permit spaces are controlled with entry permits, testing, attendants, and rescue. Entering an unassessed space is the deadliest finding.

Example: how a violation is cited

A crew enters a below-grade vault on a construction site that was never evaluated as a confined space; the atmosphere is oxygen-deficient and a worker collapses. OSHA cites 1926.1203(a) because a competent person must identify confined and permit spaces before work, with willful classifications reaching $165,514.

Illustrative example, not a specific OSHA case.

Confined Spaces General (Construction) compliance checklist

Use this to evaluate your compliance with 29 CFR 1926.1203. Each item is a key requirement OSHA may verify during an inspection.

Have a competent person identify all confined spaces and each permit space before work begins.
Evaluate each space's atmospheric, engulfment, and configuration hazards, testing as necessary.
Prevent entry to permit spaces, or run a compliant permit program with testing, permits, attendants, and rescue.
Coordinate confined-space work among all employers on the multi-employer site.
Provide continuous atmospheric monitoring where feasible, and arrange rescue before entry.
Apply Subpart AA (not general industry's 1910.146) to construction confined spaces.

2026 penalties for 29 CFR 1926.1203

Maximums set by 29 CFR 1903.15(d). 2026 amounts unchanged from 2025 (no CPI adjustment; OMB M-26-11). Not an increase. The 2025 OSHA penalty levels remain in effect for 2026; OSHA made no inflation adjustment for 2026. 29 CFR 1903.15 identifies January 15, 2025 as the effective reference for these amounts, while OSHA's public penalties page currently references penalties assessed after Jan. 15, 2026.

Violation type	Minimum	Maximum	When it applies
Serious	$1,085	$16,550	Substantial probability of death or serious physical harm.
Other-Than-Serious	$0	$16,550	Relates to safety/health but unlikely to cause death or serious harm.
Willful	$11,823	$165,514	Intentional, knowing, or voluntary disregard of the requirement.
Repeated	$4,256	$165,514	A substantially similar violation cited within the last 5 years.
Failure to Abate	None	$16,550/day	up to $16,550 per day; total capped at 30x the daily amount (FOM Ch.6)

Confined-space citations follow entry fatalities and are high-gravity. Serious violations reach $16,550 and willful or repeat violations $165,514; unassessed spaces and no permit program are the usual findings.

Maximums and the willful minimum are set by 29 CFR 1903.15(d); the serious and repeated minimums are OSHA policy floors from its annual penalty adjustment memo. OSHA applies gravity-based and size, good-faith and history reductions (FOM CPL 02-00-164 Ch.6). Estimates only, not legal advice.

The business case for Confined Spaces General (Construction) compliance

Construction sites are full of trenches, vaults, tanks, manholes, and pits that can hold oxygen-deficient or toxic atmospheres or engulfment hazards. Identifying which spaces are confined and which are permit-required, before anyone enters, is the foundation that makes the rest of the confined-space program (testing, permits, attendants, rescue) possible. Skipping it means workers enter blind.

Free compliance tools for 29 CFR 1926.1203

Confined Space Permit Generator Job Hazard Analysis Builder PPE Selector

Confined Spaces General (Construction) penalties by state

Penalties and enforcement vary by state. State-Plan states may impose higher penalties and additional requirements beyond federal 29 CFR 1926.1203.

Alabama Arkansas Colorado Connecticut Delaware District of Columbia

View all 50 states + DC →

Frequently asked questions about 29 CFR 1926.1203

What does 1926.1203 require before construction work?

Under 1926.1203(a), before beginning work at a worksite each employer must ensure that a competent person identifies all confined spaces in which its workers may enter and identifies each one that is a permit-required confined space, evaluating the space's elements with atmospheric testing as necessary. This identification is the foundation of the construction confined-space program under Subpart AA.

Does construction use a different confined-space standard than general industry?

Yes. Since 2015, construction has its own confined-spaces standard, Subpart AA (1926.1201 through 1926.1213), separate from general industry's 1910.146. The concepts overlap (identify spaces, classify permit spaces, and protect entrants) but Subpart AA adds construction-specific requirements such as coordination among multiple employers on a site and an emphasis on continuous atmospheric monitoring.

Who must identify confined spaces on a construction site?

A competent person. Under 1926.1203(a), the employer must ensure a competent person, someone capable of identifying hazards and authorized to take corrective action, identifies all confined spaces and each permit space before work begins. This is not a task for an untrained worker, because misjudging whether a space is permit-required can send an entrant into an atmosphere that kills.

What protections apply to a permit-required confined space in construction?

Once a permit space is identified, entry requires the Subpart AA protections: atmospheric testing before and during entry, a written entry permit, an attendant stationed outside, an entry supervisor, and rescue arrangements, along with any needed ventilation and PPE. The employer may instead eliminate the hazards or prevent entry, but if workers enter, the full permit program applies.

Regulatory history of 29 CFR 1926.1203

OSHA issued Subpart AA, the construction confined-spaces standard, in 2015 (80 FR 25366), giving construction its own framework parallel to general industry's 1910.146. 1926.1203 is its general requirement, and the standard added construction-specific provisions on multi-employer coordination and continuous monitoring after years of confined-space fatalities on construction sites.

Related glossary terms

Key terms that appear in 29 CFR 1926.1203, each with a full plain-English explainer.

Confined Space Atmospheric Testing Competent Person IDLH

Related guides & articles

Confined Space Entry: Permit-Required OSHA Guide Confined Spaces Construction: Subpart AA vs 1910.146

Related OSHA standards

29 CFR 1910.146

Confined Spaces

29 CFR 1926.800

Underground Construction

29 CFR 1926.1201

Confined Spaces (Construction) Scope

29 CFR 1926.1204

Permit Spaces (Construction)

Primary sources

OSHA figures on this page are imported from HazComFast's verified regulatory module (verified 2026-10-05 against eCFR, OSHA.gov, and the Federal Register).

This page is an educational summary, not legal advice. OSHA standards and penalty amounts change; confirm requirements against the current regulation and your applicable State-Plan before acting.

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