How often should a fire risk assessment be reviewed, by building type?

This is a companion to a more general piece on fire risk assessment review dates, narrowed down to a question that comes up constantly across a mixed portfolio: does a warehouse need reviewing on the same cadence as a residential block, or a care setting, or a small office? The honest short answer is no — and the reasoning behind the difference is worth understanding rather than just the resulting number.

The general principle first

The current Regulatory Reform (Fire Safety) Order 2005 doesn't set a fixed review interval by building type. It requires the assessment to be kept under review and revised when no longer valid. Building-type guidance from official sources and competent assessors tends to translate that principle into practical working intervals, reflecting how quickly risk typically changes in that setting.

Lower-risk, stable-occupancy settings

A small office with a stable, familiar workforce and little physical change year to year is often reviewed on something closer to an annual cycle as a sensible default, sometimes stretching slightly longer where an assessor judges the risk profile genuinely hasn't shifted. The key word is judged — not assumed.

Higher-risk or higher-vulnerability settings

Buildings with sleeping risk, higher-density or transient occupancy, vulnerable residents, or complex layouts — residential blocks, care settings, hospitality — generally warrant more frequent review, and some settings are reviewed considerably more often than annually where occupancy or risk genuinely changes fast. This isn't about the building being inherently more dangerous; it's about how quickly the assumptions underpinning the last assessment can go stale.

Buildings mid-change

Any building undergoing refurbishment, a change of use, or a significant occupancy change should be treated as needing review regardless of where it sits on a normal cycle — the existing assessment was written for a version of the building that may no longer exist by the time work finishes.

• –Stable, low-occupancy commercial or office space: often an annual default, extended only on an assessor's explicit judgement
• –Residential blocks and multi-occupancy buildings: typically reviewed at least annually, with common parts monitored more continuously
• –Care, healthcare and other higher-vulnerability settings: frequently reviewed more often than annually given occupant risk
• –Buildings mid-refurbishment or change of use: reviewed against the new configuration, not the old review date
• –Warehousing and industrial: interval driven largely by process and storage changes rather than a fixed calendar figure

Managing different intervals across a mixed portfolio

Most portfolios aren't uniform — a single responsible person or managing agent might hold a mix of residential blocks, small commercial units and the occasional higher-risk setting, each with a legitimately different review cadence. Tracking that by memory or a shared calendar gets error-prone quickly; tracking it building by building, with each review date sitting against its own record, is closer to what portfolio-wide reporting is meant to solve.

Frequency is not the only variable

Two buildings on the same review frequency can be in very different positions, because frequency only governs the scheduled review. What actually determines whether an assessment stays current is how responsive it is to change — and a stable, unchanging office on a longer cycle may be better covered than a building with constant tenant churn on a shorter one.

The practical implication is that setting a frequency is the easier half. The harder half is a process that notices change between reviews, which means somebody with a reason to ask the question when works are commissioned, tenants change, or occupancy patterns shift.

Common mistakes

• –Setting a frequency and treating change between reviews as somebody else's problem
• –Applying one frequency across a portfolio of very different buildings
• –No record of the reasoning behind the chosen interval
• –Reviews that repeat the previous assessment rather than reconsidering it
• –Not revisiting frequency when a building's use or occupancy changes materially
• –Treating a review as a formality when nothing obvious has changed

The right interval for a specific building is ultimately the judgement of the competent person who carried out the assessment, informed by current official guidance — treat any general figures here as a starting point for that conversation, not a substitute for it.