The federal workplace radon limit of 200 Bq/m³ takes effect on 30 January 2027. Long-term measurement takes a minimum of three months during the heating season, and only one heating season remains. For an organisation holding dozens or hundreds of untested buildings, the arithmetic simply does not close.
The question that follows is reasonable and widely asked: what happens if we cannot test everything in time? This page sets out what is actually documented about how the Labour Program approaches that situation, what is not, and what a defensible plan contains.
TL;DR: There is no published scheme granting extensions for radon. What exists is a compliance continuum — education and counselling, then an Assurance of Voluntary Compliance, then a direction, then administrative monetary penalties and prosecution — and escalation depends expressly on the seriousness of the contravention and the co-operation of the workplace. An employer with a written, risk-ranked, in-progress plan sits at a very different point on that continuum from one with nothing.
First, what does not exist
There is no application form, no formal extension process, and no published Labour Program policy that grants federally regulated employers additional time to meet the radon limit. Anyone describing a "phased compliance programme" as though it were an established scheme with entry criteria is overstating the position.
What exists instead is the ordinary enforcement architecture of Part II of the Canada Labour Code, and that architecture is more accommodating to a co-operative employer than most people realise.
The compliance continuum, as the Labour Program describes it
Part II of the Code is administered by the Labour Program of Employment and Social Development Canada, whose health and safety officers work to a published compliance policy. The Labour Program's own description of enforcement is the important sentence:
"Part II of the Canada Labour Code is enforced by a series of escalating actions that depend on the seriousness of the violation and the co-operation of the workplace."
Co-operation is not a courtesy. It is one of the two stated factors determining where an employer lands on the enforcement scale.
| Stage | What it is |
|---|---|
| Education and counselling | Labour Program officials work with employers to explain obligations and support compliance. This is a routine part of the continuum, not a failure state. |
| Assurance of Voluntary Compliance (AVC) | "Typically the first level of enforcement." A written commitment from the employer to a health and safety officer to correct the contraventions described in the AVC, and to provide written confirmation of compliance by a specific date. Note the limit: an AVC is never to be used to correct a situation of danger. |
| Direction | A formal written order to terminate and correct a contravention within a specified period. An officer must issue a direction where a danger exists, or where corrective actions specified in a previous AVC have not been completed. An officer may also issue a direction in lieu of an AVC where appropriate. |
| Administrative monetary penalties, public naming | For situations more serious than voluntary compliance measures can manage. The SOR/2026-10 package made consequential amendments to the AMP regulations, so contraventions of the amended provisions may attract penalties. |
| Prosecution | The most serious end of the continuum. |
Appeals of a direction go to the Canada Industrial Relations Board within 30 days, and an appeal does not stay the direction — compliance continues unless and until an appeals officer rescinds it.
Why the AVC matters here
Read the AVC description again with a large portfolio in mind. It is a written commitment to correct identified contraventions by a specified date, confirmed in writing when done.
That is, structurally, a phased plan — formalised, agreed with an officer, and time-bound. It is the mechanism the Code already contains for the situation where a contravention cannot be fixed on the spot.
Two cautions on relying on it. First, an AVC generally arises after a contravention has been identified, typically through an inspection or a complaint — it is not a permit obtained in advance. Second, and more seriously: a direction must be issued where corrective actions specified in a previous AVC have not been completed. An AVC you fail to honour actively worsens your position.
What industry reporting adds — and how much weight to give it
Consultants working with federally regulated clients have reported that the Labour Program has acknowledged that testing a large untested portfolio by the in-force date may not be realistic, and that a phased approach — highest-risk buildings first, with documented prioritisation and a written plan for the remainder — can be a recognised path forward, provided it is raised with and agreed by the regulator proactively.
Treat that as what it is: reporting of discussions, not published policy. We have not been able to locate any Labour Program document stating it, and we would not rely on it as an entitlement. It is, however, entirely consistent with the published continuum — an employer who approaches the regulator with a documented plan is demonstrating precisely the co-operation the compliance policy says determines escalation.
The same reporting is clear that this flexibility is not automatic, requires a documented plan rather than an explanation, and that employers who engage early are treated differently from those who do nothing. It also notes what should be obvious: the amendments have been public since the Gazette Part I proposal in October 2023, so unawareness is not available as an explanation.
What a defensible phased plan contains
- A risk-ranked building inventory. Every building in scope, ranked with a method you can explain. This is the foundation — see how to risk-rank a building portfolio.
- A documented testing schedule with clear phase sequencing. Which buildings in which heating season, and why in that order.
- A framework showing how full compliance is reached — not just phase one, but the route to finishing.
- Evidence of ongoing action and progress. A plan on a shelf is worse than no plan; it establishes that you knew.
- Formal engagement with the Labour Program on record. In writing, before the deadline rather than after it.
- Named accountability. Who owns the programme, and what happens when they leave.
Every one of these is a document. None requires anyone to be in a building.
Do not stop at planning
The most important thing a large portfolio holder can do this autumn is start testing the top of the ranking, not perfect the plan.
The deployment window runs roughly 1 October to the end of January — detectors placed later push the measurement outside the heating season. An employer who has tested its highest-risk buildings and can show a schedule for the rest is in an entirely different position from one holding a well-written plan and no results. Evidence of progress is one of the elements; it cannot be produced retroactively.
A note on high results
Phasing addresses the timing of measurement. It does not address what happens when a measurement comes back high. The AVC mechanism is expressly not to be used to correct a situation of danger, and Health Canada recommends remediation within two years above 200 Bq/m³ and within one year above 600. A phased testing plan should therefore include what you will do, and how quickly, if an early result is significantly elevated — because that question is separate from scheduling and will not wait for phase three.
Common questions
Is there an official extension process for the radon limit?
No. There is no published scheme, application or formal extension. What exists is the Labour Program's escalating compliance continuum, in which co-operation of the workplace is an express factor.
What is an Assurance of Voluntary Compliance?
An employer's written commitment to a Labour Program health and safety officer to correct described contraventions and confirm compliance in writing by a specified date. It is typically the first level of enforcement, and it is never used to correct a situation of danger.
What happens if we do not complete what an AVC requires?
A health and safety officer must issue a direction where corrective actions specified in a previous AVC have not been completed. Failing to honour an AVC escalates the matter rather than preserving the status quo.
Should we contact the Labour Program before the deadline?
Industry reporting suggests proactive engagement with a documented plan is viewed differently from silence, and that is consistent with a compliance policy naming co-operation as a factor. This is a decision to take with your own legal advisor, since what you put in writing to a regulator has consequences.
Does a plan protect us if we simply have not started?
Evidence of ongoing action and progress is one of the elements of a defensible position. A plan with no testing behind it demonstrates awareness of the obligation without discharge of it.
Read next
How to risk-rank a building portfolio · The compliance timeline · What a compliant radon record contains · The workplace radon legal brief
RadonTest.ca provides testing logistics and laboratory submission. We do not perform radon mitigation and we do not interpret health risk — Health Canada is the health authority on radon in Canada. This page describes publicly available regulatory information and is not legal advice. Decisions about what to communicate to a regulator should be taken with your own legal advisor.
Sources
Employment and Social Development Canada, Workplace health and safety compliance (compliance policy, AVC, directions, AMPs, prosecutions); OPD 700-2, Compliance Policy, Canada Labour Code, Part II; Canada Labour Code, Part II, and appeals to the Canada Industrial Relations Board; Canada Gazette, Part II, Vol. 156, No. 6 (compliance continuum: education and counselling, AVC, compliance order, AMPs); ESDC, Backgrounder: Administrative monetary penalties and public naming of employers; Canada Gazette, Part II, Vol. 160, No. 3 (SOR/2026-10); Health Canada, Canadian radon guideline.