Avoice Regulations

England Higher-risk buildings: occupation

Submit a mandatory occurrence notice and report

Library captured 10 September 2026 · Source updated 31 January 2024

The completeness of this source capture has not yet been verified. Check the original publication when referencing it.

Submit a mandatory occurrence notice and report

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You must a submit a mandatory occurrence notice and report for a safety occurrence in a higher-risk building.

A higher-risk building is a building that has at least:

7 storeys or is at least 18 metres high

2 residential units or is a hospital or a care home

The notices and reports must be for safety occurrences related to fire safety (design and construction phase), fire spread (occupation phase) or structural failure (all phases) that caused, or are likely to present a risk of:

the death of a significant number of people

serious injury that needs immediate treatment in hospital or causes a permanent or irreversible disabling condition to a significant number of people

Safety occurrence are incidents or risks involving:

structural failure of the building

fire safety (design and construction phase)

the spread of fire or smoke in the building (occupation phase)

Unless they are remedied, safety occurrences would be likely to present a risk of serious harm to people when the building is in use and include both:

an incident that has happened

the risk of an incident happening in the future

You must do this even if the safety occurrence is remedied immediately. The only exception is when a principal contractor remedies issues to ongoing building work, which are unlikely to risk significant numbers of death or serious injury.

Read guidance on safety occurrences that must be reported to the Building Safety Regulator (BSR).

Who must submit a mandatory occurrence notice and report

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Submit a mandatory occurrence notice and report if you are, or you are acting for:

an accountable person or principal accountable person

principal contractor or principal designer and construction work has started on the building

Mandatory occurrence notice

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You must submit a mandatory occurrence notice as soon as you can when a safety occurrence is identified, and before you submit your report.

You will need to provide:

the high-rise residential building registration reference or the building control application reference

your contact details

the date and time the safety occurrence was identified

a brief description of the safety occurrence

any immediate actions you’ve taken since to keep people safe

When you submit a mandatory occurrence notice, BSR will give you a reference number you can use to submit a mandatory occurrence report.

Mandatory occurrence report

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You must submit a mandatory occurrence report after submitting your notice and within 10 calendar days of identifying the safety occurrence.

You will need to provide:

your mandatory occurrence notice reference

who submitted the notice – if someone else submitted the notice, we will need your contact details

the type of safety occurrence you are reporting

what happened or has the potential of happening

what caused the safety occurrence and how it was discovered

who is involved and the effect or potential effect on them

what you have done and plan to do to keep people safe

anything you think should be shared for others to learn from

any supporting information, such as documents, videos, or photos

Get help using this service

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Telephone: 0300 790 6787

Monday to Friday, 8:30am to 5pm (except Wednesdays when we are open from 10am to 5pm, and public holidays when we are closed).

If you would prefer to speak to us on the phone in a language other than English, a translation service is available.

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