Structural Risk Assessment: A Complete Guide for Higher-Risk Buildings

If you're an Accountable Person, Principal Accountable Person, developer, or managing agent responsible for a Higher Risk Building (HRB), you've likely been told you need a "structural risk assessment" — but the term is used loosely across the industry, and it's often unclear exactly what should be delivered, how it differs from a standard condition survey, and why it now sits at the centre of Building Safety Act compliance.

This guide sets out, in plain terms, what a structural risk assessment actually involves, who needs one, what it costs to get wrong, and how it fits into the wider Building Assessment Certificate process.

What Is a Structural Risk Assessment?

A structural risk assessment is a systematic review of a building's structural form, condition, and integrity, carried out to identify hazards that could affect structural safety, evaluate the likelihood and consequence of each hazard, and provide proportionate, evidence-led recommendations to manage the risk.

Unlike a routine condition survey — which typically records the visible state of a building's fabric — a structural risk assessment is explicitly risk-based. It asks not just "what is the condition of this element?" but "what is the realistic likelihood of structural failure here, what would the consequences be, and what needs to happen as a result?" That distinction matters, because it's the framework the Building Safety Regulator (BSR) expects to see evidenced.

Why Structural Risk Assessments Matter Under the Building Safety Act

Under the Building Safety Act 2022, a Higher Risk Building is one in England that is at least 18 metres in height or has at least 7 storeys, and contains at least 2 residential units. Every HRB must be registered with the Building Safety Regulator, and the Accountable Person (or Principal Accountable Person, where there is more than one Accountable Person) carries an ongoing legal duty to assess and manage building safety risks — structural risk included.

Structural safety sits alongside fire safety as one of the two core pillars the Building Safety Regulator considers when reviewing a Building Assessment Certificate application. A structural risk assessment that is incomplete, generic, or not proportionate to the specific building can delay a BAC application or trigger further information requests from the Regulator — which is why a defensible, building-specific assessment matters more than a paper exercise.

Who Needs a Structural Risk Assessment?

• Accountable Persons and Principal Accountable Persons of existing Higher Risk Buildings, as part of ongoing safety case management and BAC applications.
• Managing agents carrying out due diligence on buildings they are taking on, or reviewing existing structural documentation for adequacy.
• Freeholders and building owners preparing a portfolio of HRBs for Building Assessment Certificate applications.

What a Structural Risk Assessment Involves

A properly conducted structural risk assessment generally follows a consistent methodology, though the depth of investigation will vary with the building's complexity:

1. Desktop review

Existing drawings, previous structural reports, condition surveys, and any as-built information are reviewed to understand the structural form — frame type, foundation type, and any known areas of structural sensitivity such as transfer structures.

2. Site inspection

A Chartered structural engineer inspects the building, focusing on structural elements and areas of known risk: transfer structures, facade fixings and their interaction with the structural frame, movement or deterioration in load-bearing elements, and evidence of any historical alterations that may have affected structural performance.

3. Hazard identification and risk scoring

Identified hazards are scored against likelihood and consequence, in line with the risk-based approach the Building Safety Regulator expects — rather than a simple pass/fail condition rating.

4. Reporting and recommendations

The output is a clear, defensible report setting out findings, risk ratings, and prioritised, proportionate recommendations — written so it can be relied on directly in a Building Assessment Certificate application or Safety Case Report.

Structural Risk Assessment vs Condition Survey vs Gap Analysis

These three terms are often used interchangeably, which causes confusion when instructing a survey:

• Condition survey — a factual record of the current physical condition of the building fabric, without a formal risk assessment framework.
• Structural risk assessment — a risk-based review specifically targeting structural safety hazards, their likelihood, and consequence, aligned to Building Safety Act requirements.
• Gap analysis — a review of existing survey or assessment documentation to identify where it falls short of current Building Safety Act requirements, often used where a building already has historical reports that need validating rather than a full new assessment.

Many buildings already have some structural documentation. If yours does, a gap analysis is often the faster and more cost-effective starting point — see our gap analysis service for more detail.

What Happens If Structural Risk Isn't Properly Assessed

Where structural risk hasn't been adequately assessed, the practical consequences for an Accountable Person can include: delay or refusal of a Building Assessment Certificate application, enforcement action from the Building Safety Regulator, exposure to personal and organisational liability given the Accountable Person's statutory duty, and — most importantly — genuine unmanaged risk to residents. A superficial or generic assessment that isn't proportionate to the specific building is unlikely to satisfy the Regulator and can end up costing more in re-work than commissioning it properly the first time.

How Often Should a Structural Risk Assessment Be Reviewed?

A structural risk assessment isn't a one-off exercise. Good practice is to review it periodically as part of a planned preventative maintenance (PPM) programme, and to trigger a fresh review following any notable event: a change of use, discovery of a new defect, structural alterations, or any incident that could plausibly have affected the structure. Building this into an ongoing PPM schedule — rather than treating it as a single certificate-driven task — is generally the more defensible long-term position for an Accountable Person.

Frequently Asked Questions