Twenty One Hazards, Three Bands: What the HHSRS Reform Asks of Professional Landlords

If you let property as a business, the Housing Health and Safety Rating System has been part of your working life since 2006, usually as something that happens to you rather than something you use. On 23 June 2026 it was substantially rewritten. The Housing Health and Safety Rating System (England) (Amendment) Regulations 2026 cut the prescribed hazards from twenty nine to twenty one, replaced the ten lettered bands with three named ones, and renamed the four classes of harm. New operating guidance, enforcement guidance and a landlord and agent guide were published on the same day, with worked case studies following at the end of July.

The temptation is to read the headline, conclude that there are eight fewer things to worry about, and return to the rent roll. That reading is wrong, and for a portfolio it is expensive.

The standard has not moved

Nothing in the June reform lowers the condition your properties must reach. The architecture of Part 1 of the Housing Act 2004 is untouched. A hazard in the top band still engages the local authority's duty under section 5 to take the appropriate enforcement action, and there is no discretion in that duty. A hazard in either of the lower bands still engages only the power under section 7, which the authority may exercise or may not. What has changed is the vocabulary in which the assessment is expressed, and the method by which the assessor arrives at it. The obligation itself is exactly where it was.

The hazards did not go away, they moved

The reduction from twenty nine to twenty one was achieved by amalgamation rather than deletion, and this is the point most likely to catch a landlord who reads the new list quickly. Carbon monoxide no longer appears as a hazard in its own right. It now sits within a consolidated description of indoor air pollutants, alongside the chemicals used to treat timber and mould, nitrogen dioxide, sulphur dioxide and smoke, uncombusted fuel gas, and volatile organic compounds. Food safety, personal hygiene, sanitation and drainage, pests and refuse have likewise been drawn together under domestic hygiene. Falls on the level now absorbs falls associated with baths and with changes in level below three hundred millimetres. Fire and explosions are assessed as one, as are collisions, entrapment and ergonomics.

A landlord who searches the new schedule for carbon monoxide, fails to find it, and concludes that the risk has been deregulated will be gravely mistaken. The hazard is assessed as it always was. It simply carries a different name, and the separate statutory duties in relation to alarms and to gas safety are wholly unaffected.

High, Medium and Low, and the arithmetic beneath them

The lettered bands from A to J have gone. In their place are three. High, where the hazard scores one thousand or more. Medium, where it scores at least one hundred but less than one thousand. Low, where it scores below one hundred. The scoring formula that produces those figures is unchanged, so the numerical threshold that has separated a Category 1 hazard from a Category 2 hazard since 2006 survives intact. High corresponds to Category 1. Medium and Low sit within Category 2.

There is a trap in the new vocabulary worth naming. Moderate is now one of the four classes of harm, alongside serious, severe and extreme. Medium is one of the three bands. They are different concepts doing different work, and scheme documents and trade summaries are already appearing which use moderate where the Regulations say medium. Whether you are reading a report or writing one, the distinction is worth holding on to.

Baseline indicators, and the benchmark you can now audit against

The most useful change for a professional landlord is the one that has attracted the least attention. Assessment now begins from a set of baseline indicators, and the guidance is blunt about their function: anything that does not comply with the baseline indicators is a deficiency which must then be assessed. The indicators are broad, running from drainage to fire safety and from noise to pest management, and the landlord and agent guide carries a self assessment checklist across nineteen categories, covering structural condition, plumbing, sanitary facilities, heating and fire safety among others.

Worked examples, which previously did much of the interpretive labour, have been removed. The indicators now carry that weight. For anyone managing more than a handful of units this is the first published benchmark against which stock can be audited systematically, in advance, and on your own timetable rather than an officer's. It would be a poor use of the reform to leave it unread.

Excess cold, and the limits of an EPC

It is worth stating plainly, because the assumption is so widespread: compliance with the Minimum Energy Efficiency Standard does not immunise a property against an excess cold hazard. The two measures ask different questions. An energy performance certificate reflects a modelled figure derived from the fabric and services of the building. An assessment under the rating system considers the actual dwelling, its actual deficiencies, and the likelihood of harm over the following twelve months to the most vulnerable age group rather than to the tenant who happens to live there. A property may be lawfully let at an E rating and still present excess cold in the High band. Any landlord who has treated the certificate as the whole of the obligation on warmth should revisit that assumption before the winter.

If an inspection is already under way

The Regulations contain a transitional provision which matters to anyone currently in correspondence with a local authority. The amendments apply only to an inspection under section 4 of the Housing Act 2004 commenced on or after 22 June 2026, the day before the Regulations came into force. An inspection begun before that date continues to be governed by the previous framework, with twenty nine hazards and lettered bands.

If you have an open matter, establish when the inspection commenced before you respond to anything at all. It determines the currency in which the hazard is expressed, and therefore what any notice may properly say. It is a short question with a long tail.

The argument moves from the band to the record

Compressing ten bands into three removes much of the room that once existed to argue about grading. The centre of gravity in a dispute shifts accordingly, away from which letter ought to have been applied, and towards what the landlord knew, when they knew it, and what they did next.

That shift rewards good records and punishes their absence. A local authority may serve notice under section 235 of the Housing Act 2004 requiring a relevant person to produce specified documents, and a portfolio landlord should have systems capable of answering such a request promptly and completely. It is worth remembering too that an improvement notice is registered as a local land charge. It attaches to the property, survives a sale, and will surface on a buyer's searches. For a portfolio that is not merely an operational irritation. It is a matter for the balance sheet, and for any lender or purchaser who looks carefully.

The wider direction of travel

This reform does not stand alone. It arrives while the condition provisions of the Renters' Rights Act 2025 are being brought into effect, and the two point the same way. Property condition is becoming a matter of record rather than of correspondence, assessed against published benchmarks and evidenced by documents a landlord is expected to produce on demand. Accreditation schemes have begun revising their manuals accordingly, and accredited landlords should keep in mind that they carry two standards at once: the legal minimum, and the scheme standard, which is frequently and deliberately the higher of the two. Several schemes will consult their members during 2027, and that consultation deserves the time of anyone holding stock at scale.

A closing thought

Reform of this sort rarely changes what a careful landlord actually does. It changes what a careful landlord must be able to demonstrate. The properties that were safe on 22 June were still safe on 24 June, and those that were not have simply acquired a new label for an old problem. What the June Regulations have done is make the benchmark explicit, the banding blunter and the evidential burden more visible. Those are conditions in which the well organised do well and the casually managed are found out, which is, one suspects, rather the point.

About the author: Dr Aamir Nawaz, LLB (Hons), LLM, PhD, Solicitor, Barrister (np) and Notary Public.