If you own or manage an HMO, it is common to worry whether the fire alarm would actually wake sleeping occupants, particularly students or younger tenants. This concern often arises after a near miss, a complaint from a tenant, or when a contractor presents a costly quote claiming the existing system is not loud enough. Understanding what is genuinely required, and what may be unnecessary or poorly justified, is essential before upgrading your fire alarm.

Why Alarm Sound Levels Matter in HMOs

HMOs present a higher fire risk than single household dwellings. Occupants may be unfamiliar with the building, may not know each other, and are more likely to be asleep at different times. Music, headphones, alcohol, and closed bedroom doors all reduce the chance that an alarm will be heard. For these reasons, fire alarm audibility is a key consideration for both housing authorities and fire and rescue services when inspecting HMOs.

What the Guidance Actually Says

UK guidance sets clear expectations for alarm audibility. In general terms, fire alarm sounders should achieve:

At least 65 dB(A) in all accessible areas.
At least 75 dB(A) at the bedhead in bedrooms.

Where occupants may have hearing impairments, higher sound levels or alternative alerting devices may be required. These figures are commonly referenced in British Standards guidance and local authority HMO standards, and they are often the benchmark used when assessing whether an alarm is suitable.

Why Bedroom Doors Are Critical

In HMOs, bedroom doors are usually fire resisting and fitted with self closers. While this is essential for fire protection, it significantly reduces how much sound enters the room. In our experience, it is unlikely that a fire alarm sounder in a common area will reach 75 dB(A) at the bedhead through a closed fire door. A system that sounds adequate in a hallway or kitchen may fall well below required levels inside a closed bedroom. This is often where problems are identified during sound testing.

When Expensive Quotes Appear

Many HMO landlords first question alarm audibility after being presented with a quote to add extra sounders, upgrade the panel, or replace the system entirely. Common reasons given include:

Sound levels allegedly not meeting required standards.
Changes to HMO licensing conditions.
New guidance or inspection feedback.

While upgrades are sometimes necessary, we regularly see quotes that go beyond what is proportionate, or that do not clearly explain the basis for the recommendation.

How Alarm Sound Levels Should Be Assessed

Whether an alarm is loud enough should be determined through proper assessment, not assumptions. This typically involves:

Reviewing the fire risk assessment.
Confirming the type of fire alarm system installed.
Measuring sound levels in representative bedrooms with doors closed.
Considering the occupant profile, such as students or shift workers.

Without this context, it is impossible to say whether upgrades are justified.

Common Misunderstandings

Some frequent issues we encounter include:

Assuming louder is always better, without considering nuisance alarms.
Proposing full system replacement where additional sounders would suffice.
Ignoring alternative solutions such as visual alarms or vibrating pads where appropriate.
Treating guidance as absolute law rather than applying professional judgement.

What to Do If You Are Unsure

If you are worried your alarm would not wake occupants, or if you have been told your system is inadequate, the first step should always be a competent fire risk assessment. An assessor can confirm:

Whether sound levels are likely to be sufficient.
Whether testing is required.
What proportionate improvements, if any, are needed.

This often avoids unnecessary expense while ensuring life safety is properly addressed.

Independent, Practical Advice

At Fletcher Risk Management, we do not sell or install fire alarm systems. Our advice is independent and focused on what is appropriate for the building and the people living in it. We regularly advise HMO landlords across Chester, the North West and North Wales who are concerned about alarm audibility or who have been presented with expensive upgrade proposals. If you would like an objective view on whether your fire alarm is loud enough, or whether a proposed upgrade is justified, Fletcher Risk Management can help - please contact us today.

Disclaimer

This article is provided for general information only and does not constitute legal or technical advice. Fire alarm requirements and audibility expectations vary depending on the type of system, building layout, and occupants. You should always seek competent professional advice tailored to your specific HMO.

(C) Fletcher Risk Team - 11 Feburary 2026

HMOs – Is My Fire Alarm Loud Enough?