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BETTESWORTHConstruction

How to Assess the Building Safety Act: A Practical Part 4 Guide

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Assessing the Building Safety Act 2022 means identifying which part of the Act applies, confirming whether an occupied building falls within the relevant higher-risk definition, mapping each accountable person’s responsibilities, and checking that decisions are supported by current evidence. It is not a one-off checklist or certificate. For the in-occupation regime in Part 4, the work is an ongoing cycle of risk assessment, reasonable risk reduction, documented safety management, mandatory reporting and resident engagement.

The clearest starting point is the current consolidated Act, read with Part 4 and the regulations made under it. The thresholds and processes below are principally those described for occupied higher-risk buildings in England; definitions, commencement dates and operational requirements can differ elsewhere or under another Part of the Act.

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What does “assessing the Building Safety Act” involve?

The phrase can mean two different things. You may be assessing the Act as a legal framework—working out its scope, duties and evidence requirements—or assessing a particular building against those requirements. In practice, a sound review does both:

  1. Scope: identify the building, its occupation status, location, height, storeys and residential use, then apply the definition for the specific regime being considered.
  2. Dutyholders: identify the principal accountable person (PAP) and every accountable person (AP), and define the parts of the building or structure for which each is responsible.
  3. Risk controls: check that building-safety risks have been assessed and that reasonable preventive and mitigation measures are operating.
  4. Evidence: verify that the safety case, required information and records are complete, controlled and available when required.
  5. Assurance: check registration, mandatory occurrence reporting, resident communication and any regulator direction or assessment.

The Act’s stated regulatory objectives include securing people’s safety in or around buildings in relation to risks arising from buildings and improving building standards. Its principles include transparency, accountability, proportionality, consistency and targeting action where it is needed. Those principles are useful tests for the quality of a compliance system, but they do not replace checking the operative provision and regulations.

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The Part 4 text is the key source for occupied higher-risk buildings. The Act is amended over time, so use the consolidated version and confirm commencement before relying on a duty, deadline or procedure.

Does the Building Safety Act apply to my building?

For the Part 4 in-occupation regime, the UK Government’s explanatory assessment describes a higher-risk building as one with at least two residential units and either a height of at least 18 metres or at least seven storeys. These are scope thresholds for that regime, not a universal definition for every part of the Act.

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Question What to establish Why it matters
Is the building occupied? Confirm the building’s current use and occupation status. Part 4 is the in-occupation regime; design, construction and other provisions have different triggers.
Are there at least two residential units? Document the number and nature of residential units. The residential-unit condition is part of the described Part 4 threshold.
Is it at least 18 metres high or seven storeys? Use a defensible measurement and storey count, retaining plans and survey evidence. Meeting either height or storey limb, together with the residential condition, may bring the building within the described definition.
Which legal definition applies? Check the Act, relevant regulations and the building’s territory. Definitions can differ between Parts, instruments and jurisdictions.

Do not decide scope from a marketing description, an old fire-risk assessment or an informal floor count. Record how height was measured, how storeys were counted and which rooms or uses were included. If the building is close to a threshold, obtain competent surveying or legal advice and preserve the underlying measurements.

The government’s 2024 impact assessment explains the threshold and policy context, but the statute and applicable regulations control the legal result. A building that is outside the Part 4 definition may still be subject to other building, fire, health and safety or construction obligations.

Who is responsible for an occupied higher-risk building?

An accountable person is the person or organisation responsible for the safety of a building or a part of it. The PAP has the coordinating role for the building, while other APs retain responsibility for the parts within their control. Your assessment should map legal responsibility to physical areas and systems rather than simply listing company names.

Create a responsibility schedule showing, for each relevant part:

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  • the AP’s legal identity and contact details;
  • the structure, exterior, common parts or services under its control;
  • interfaces with other APs, landlords, facilities managers and contractors;
  • who can authorise remedial work and who controls records; and
  • how disagreements, access problems and urgent risks are escalated.

Shared ownership, leased plant rooms, transferred management functions and complicated freehold structures can create gaps. An AP cannot treat a gap in a lease or management contract as a gap in the statutory duty. Resolve the allocation, document the decision and ensure that information passes across interfaces.

What risk-management duties must accountable persons meet?

Part 4 requires an AP to assess building-safety risks for the part for which it is responsible and to take all reasonable steps to prevent a risk from materialising or reduce the severity of an incident if it does. The statutory wording begins: “An accountable person for an occupied higher-risk building must take all reasonable steps for the following purposes—” The surrounding provisions in the Act’s Part 4 determine what that means in the particular case.

An assessment must be suitable and sufficient to support the risk-management duty. It is not enough to identify hazards; it should show the reasoning behind controls, priorities and residual risk. It should address, as relevant:

  • fire and structural hazards arising from the building’s design, condition, materials, systems and use;
  • the people who could be harmed, including residents who may need assistance to evacuate;
  • failure modes, escalation paths and the potential severity of an incident;
  • existing controls, inspection and maintenance arrangements;
  • further reasonable steps, their owners, timescales and funding route; and
  • how effectiveness will be monitored and reviewed.

The Act also requires prompt arrangements for effective planning, organisation, control, monitoring and review. A risk register without assigned actions, verification and review dates is therefore weak evidence of compliance.

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When must the risk assessment be revisited?

The initial assessment should be made as soon as reasonably practicable after the relevant time. Further assessments are required at regular intervals, when there is reason to suspect that the existing assessment is no longer valid, and when the regulator directs an assessment within a specified period.

Set review triggers rather than relying only on an annual calendar. Triggers should include a significant alteration, change of use or occupancy, discovery of defective construction, a fire or structural incident, a relevant near miss, new information about materials or systems, a change in an AP’s control, and a regulator request. Record why the assessment remains valid when a trigger is reviewed and why any action is proportionate.

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“Reasonable steps” is fact-sensitive. The decision record should explain the hazard, available options, urgency, effectiveness, cost and practicality, and why the chosen measure is proportionate. Where immediate work is impossible, use interim controls, communicate the risk and set a firm route to permanent correction.

What evidence and records should the assessment contain?

The regime expects evidence, not just assurances. The government assessment describes a safety-case report as evidence of the risk assessment and the arrangements made to manage building-safety risks. It also describes a “golden thread” of prescribed building information and documents that must be maintained and made available as required. The exact content and format depend on the Act and current regulations.

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A practical evidence set normally includes:

  • current plans, sections, elevations and a verified storey and height record;
  • information about structure, façade, fire protection, escape routes, smoke control, alarms, firefighting systems and critical services;
  • design, construction, refurbishment and alteration records, including approved changes;
  • inspection, testing, maintenance and defect records, with close-out evidence;
  • the risk assessment, safety-case narrative, assumptions, supporting calculations and action log;
  • AP responsibility maps, contractor competence information and interface agreements;
  • resident communications, requests for information, complaints and responses; and
  • mandatory occurrence reports, regulator correspondence and evidence supplied for any directed assessment.

Control the information so users can find the current version and see who approved a change. A document repository is not automatically a golden thread: information must be accurate, traceable, protected from unauthorised alteration and available to the people who need it.

How should you carry out a Part 4 assessment?

Use the following sequence for an initial review or a structured gap assessment. Adapt it to the building and verify each legal point against current legislation and regulations.

  1. Define the legal scope. State the territory, Part of the Act, occupation status and date of assessment. Check whether the building meets the relevant higher-risk definition and record the evidence.
  2. Build the dutyholder map. Identify the PAP and APs, their control areas, decision rights and interfaces. Resolve missing contacts before analysing risks.
  3. Collect and validate building information. Reconcile drawings, surveys, fire and structural information, inspection records and alteration history. Mark unknowns explicitly; do not fill them with assumptions.
  4. Assess building-safety risks. Examine credible fire and structural scenarios, affected people, escalation, existing controls and residual risk. Use competent specialists where the hazard or evidence requires it.
  5. Decide reasonable steps. Rank actions by life-safety significance and urgency. Assign an owner, target date, interim control, verification method and funding or approval route.
  6. Prepare the safety-case evidence. Explain the building, hazards, controls, management arrangements and evidence supporting the conclusion that risks are being managed.
  7. Check required submissions and reporting. Confirm registration, information provision, any regulator direction, and the mandatory occurrence-reporting system. Verify current forms, recipients and deadlines in the applicable instruments.
  8. Engage residents. Provide required safety information, make requests and complaints workable, and explain residents’ own safety-related responsibilities.
  9. Set review controls. Schedule regular reviews and trigger-based reviews. Track changes, incidents, actions, evidence and regulator feedback.

What is mandatory occurrence reporting?

The PAP must establish and operate an effective mandatory occurrence-reporting system for an occupied higher-risk building. The Act provides for prescribed information about building-safety risks to be reported to the regulator. The Act alone does not establish every occurrence, reporter, form or deadline, so consult the current regulations and regulator directions before writing a procedure.

Your system should define how residents, staff, contractors and visitors can raise a concern; who screens and escalates it; what information is captured; how urgent danger is controlled; and how reports are retained and reviewed for trends. Make clear that emergency services are contacted immediately where there is an immediate threat; mandatory reporting is not a substitute for emergency action.

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What information and rights do residents have?

Resident engagement is part of the safety system, not a public-relations exercise. The government assessment describes residents’ access to building-safety information, their ability to request further information and complaint routes. It also describes safety-related resident duties: not creating a significant risk of fire or structural failure, not interfering with relevant safety items and providing information reasonably required to assess and manage risks.

Give residents information in an understandable format and explain how to request more detail. Keep a record of requests, responses and unresolved issues. Design communications for accessibility and language needs, and provide a route for urgent concerns. When a control changes—such as access arrangements, fire-door requirements or planned remedial work—explain what residents must do, what the AP is doing and where to report a problem.

How does regulator assessment fit into the process?

The government assessment describes building registration and regulator-directed building assessment certificates as parts of the oversight process. When directed, the PAP applies and supplies the required information and documentation; the regulator assesses whether relevant duties are being met.

Treat a direction as a defined evidence request, not as permission to postpone routine management. Confirm the scope, deadline, responsible person and quality review for every submission. Keep a complete copy of what was provided and the evidence supporting it. Current directions and official guidance should be checked because operational processes can change.

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What should you compare when two buildings or compliance situations differ?

A useful comparison follows the statutory structure rather than relying on labels such as “managed” or “remediated.” Compare:

Comparison axis Questions to ask
Scope Does each building meet the relevant higher-risk definition for the particular regime, using verified height, storeys and residential-unit information?
Responsibility Who is the PAP and which AP controls each part, system and interface?
Evidence Are risk assessments, safety-case reasoning, building information and action records complete and current?
Operations Are reporting, maintenance, change control, review and resident engagement arrangements actually defined?
Legal timing Do commencement dates, regulations and regulator directions create different duties or deadlines?

This approach avoids the common error of assuming that a similar height or construction type produces the same legal outcome.

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What are the most common assessment mistakes?

  • Using the threshold as a complete compliance test. Height and storeys determine one scope question; they do not prove that duties are being met.
  • Applying the Part 4 definition everywhere. Other Parts of the Act and other instruments can use different definitions and triggers.
  • Treating a fire-risk assessment as the whole safety case. Fire evidence is important, but the regime also concerns structural risk, building information, management and interfaces.
  • Leaving AP boundaries vague. Unclear control of façades, plant, access or shared systems creates predictable gaps.
  • Keeping records but not decision logic. The file should show why controls and priorities were selected, not only that an inspection occurred.
  • Making resident duties one-sided. Information, engagement and complaint routes must accompany any statement of resident responsibilities.
  • Ignoring change. Alterations, incidents, defects and new evidence can make an assessment invalid before the next scheduled review.
  • Assuming a certificate ends the duty. Regulator assurance does not remove the continuing obligation to manage risks while responsible for the building.

What should a construction or property team keep on its review checklist?

At each review, ask the following and retain the answers:

  • Have we confirmed the applicable Part, territory, commencement status and current regulations?
  • Can we evidence the building’s height, storeys, residential units and occupation status?
  • Are the PAP and APs correctly identified, contactable and mapped to physical control?
  • Is the risk assessment suitable and sufficient, with assumptions and unknowns visible?
  • Are reasonable preventive and mitigation actions assigned, funded, monitored and verified?
  • Is the safety-case report supported by a controlled golden thread of current information?
  • Is mandatory occurrence reporting available, understood and reviewed for effectiveness?
  • Can residents obtain required information, raise concerns and complain without unnecessary barriers?
  • Have we checked for review triggers, regulator directions and overdue actions?
  • Would an independent reader understand what was decided, why it was reasonable and what happens next?

Where should you verify the law before relying on an assessment?

This article is a practical framework, not a provision-by-provision legal opinion. Before making a legal conclusion, check the current consolidated Building Safety Act 2022, the specific Part 4 provisions, applicable regulations and current regulator directions. Confirm territorial scope, commencement, definitions, reporting details, enforcement consequences, appeal routes and any remediation or leaseholder protections that may affect the situation. For a borderline building or unresolved dutyholder dispute, obtain advice from a suitably qualified building-safety or legal professional.

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Bottom line: a credible assessment connects scope, accountable-person responsibility, risk controls, evidence, reporting and resident engagement. If any one of those links is missing or out of date, the assessment is not a reliable picture of Building Safety Act compliance.

Frequently Asked Questions

Does the 18-metre rule automatically mean every building above that height is covered?

No. For the Part 4 in-occupation description used here, the building also needs at least two residential units, and the applicable legal definition and regulations must be checked. Other Parts of the Act may use different tests.

Can a facilities-management company be the accountable person?

It can be an accountable person only if the statutory responsibility and control conditions are met; a service contract alone does not decide the issue. Map legal control of each part and system, then document the relationship between the owner, manager and contractors.

How long should building-safety records be kept?

The available data does not establish a single universal retention period. Follow the applicable Act provisions, regulations, regulator directions and information-management requirements, and retain enough history to explain risk decisions, changes, incidents and remedial verification.

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What should residents do if they cannot obtain safety information?

Use the building’s stated information-request or complaints route and keep a record of the request and response. If the issue concerns immediate danger, use the emergency route first; unresolved governance concerns may require escalation through the applicable regulator or legal process.

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