The Housing Health and Safety Rating System assesses rented and other dwellings in England against 21 hazards, from damp and excess cold to fire and overcrowding. Government case studies now provide model assessments for every hazard, and where a hazard scores as Category 1, the council has a legal duty to take enforcement action.
TL;DR · LAST REVIEWED 30 July 2026
- HHSRS is the risk-based system councils use to assess housing hazards under the Housing Act 2004, covering 21 hazards across accidents, health, infection and psychological requirements.
- Category 1 hazards trigger a legal duty on councils to act; Category 2 gives discretion.
- New government case studies provide model assessments for every hazard to make scoring consistent.
- Tenants can ask their council for an inspection, and landlords face enforcement from improvement notices to prohibition orders.
KEY FACTS
- HHSRS assesses dwellings in England against 21 hazards under the Housing Act 2004, Part 1
- Category 1 hazards place a legal duty on the council to take enforcement action; Category 2 action is discretionary
- Government case studies now provide model assessments for all 21 hazards, replacing worked examples from 2004
- Assessments score the likelihood of harm over 12 months and the spread of harm outcomes, benchmarked against national averages
- Tenants can request a council inspection, and enforcement ranges from improvement notices to prohibition orders
What HHSRS is and why it matters
The Housing Health and Safety Rating System is the method every local authority in England uses to judge whether a home is safe to live in, introduced by the Housing Act 2004 and applying to rented homes above all, since councils' enforcement powers bite on landlords. It is a risk assessment system rather than a standards checklist: instead of asking whether a property meets a fixed specification, an assessor considers the condition of the dwelling and scores the likelihood that a hazard will cause harm to a vulnerable occupant over the next twelve months, and how severe that harm would be, benchmarked against national averages for the property's age and type. The system covers 21 hazards in four groups: physiological requirements such as damp and mould, excess cold, excess heat and radiation including radon; protection against accidents, including falls, fire, electrical hazards and structural collapse; protection against infection through hygiene and water supply; and psychological requirements covering crowding and space, entry by intruders, lighting and noise. The scoring produces a number, and the number determines the law's response: hazards scoring in the highest bands are Category 1, where the council has a statutory duty to take action, while lower-scoring Category 2 hazards give the council discretion to act.
What the new case studies add
The government has published a full set of case studies providing model HHSRS assessments for each of the 21 hazards, replacing the original worked examples that had stood since the system's introduction in 2004. Produced through the HHSRS review commissioned from RHE Global with Cardiff Metropolitan University, the case studies walk through realistic scenarios from a pre-1920 studio flat with inadequate living space to properties with fire, electrical and damp deficiencies, showing exactly how an assessor moves from a list of deficiencies to a likelihood score, a spread of harm outcomes and a final hazard band. Each case study also demonstrates the baseline indicators developed in the review, the benchmark conditions against which deficiencies are judged, and proposes the improvement works needed to remove a Category 1 hazard or reduce a Category 2 one, including honest examples where a dwelling cannot be improved, such as an undersized flat whose only fix is reconfiguring the building around it. The stated aim is consistency: assessments of the same property by different officers should land in the same place, and landlords, agents and tenants get an open view of how the scoring actually works rather than encountering it for the first time in an enforcement notice.
What landlords need to know
For landlords, HHSRS is the machinery behind most housing enforcement, and the case studies are effectively the examiner's mark scheme published in advance. The hazards that dominate enforcement in practice are the unglamorous ones: excess cold in poorly insulated or inadequately heated homes, damp and mould growth, falls on stairs, fire in converted flats and houses in multiple occupation, and electrical hazards flagged by an unsatisfactory condition report. Where a council finds a Category 1 hazard it must act, and its menu runs from hazard awareness notices through improvement notices requiring works by a deadline, to prohibition orders closing all or part of a property, emergency remedial action, and in the worst cases demolition or clearance. Non-compliance with an improvement notice is an offence carrying an unlimited fine or a civil penalty of up to £30,000, and improvement notices can restrict rent recovery and trigger banning order consequences for repeat offenders. The companion Landlord and Agent Guide to Housing Health and Safety sets out these responsibilities under the Housing Act 2004, and the practical advice from the case studies is direct: fix the deficiencies the assessment would find before an assessor does, prioritising heating, damp pathways, stairs, fire precautions and electrics, since those drive the scores that create legal duty.
What tenants can do
For tenants, HHSRS is the route to enforcement that does not depend on the landlord's cooperation. Any tenant who believes their home contains serious hazards, persistent damp and mould, dangerous stairs, no adequate heating, faulty electrics or overcrowding among them, can ask their local council's private sector housing team to inspect, and the council assesses using exactly the system the case studies illustrate. A Category 1 finding obliges the council to act against the landlord, and retaliatory eviction protections mean a valid section 21 notice cannot be served for six months after the council serves an improvement notice or takes emergency action, a protection worth knowing before reporting. Tenants in social housing gain a parallel route as Awaab's Law begins forcing social landlords to investigate and fix damp and mould within fixed timescales, with the requirements extending across further hazard groups over time. The case studies also matter for tenants because they set expectations honestly: not every defect is a Category 1 hazard, scoring depends on likelihood and severity rather than annoyance, and the worked examples show the difference between conditions a council must act on and those where it may. Renters unsure where their situation falls can seek free advice from their council, Citizens Advice or Shelter before and after any inspection. Related: our money guides, bills section, comparison guides and the latest UK news.
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DISCLAIMER
This article is for general information only and does not constitute financial, legal or immigration advice. Figures and policy positions are correct at the time of writing and may change. Always check the relevant official source before acting.
Frequently asked questions
What are the 21 HHSRS hazards?
They span four groups: physiological (including damp and mould, excess cold, excess heat, radiation, lead and asbestos), accidents (falls, fire, electrical, structural), infection (hygiene, water supply) and psychological (crowding, entry by intruders, lighting, noise).
What is a Category 1 hazard?
A hazard scoring in the highest HHSRS bands, at 1,000 points or more. A council that finds one has a legal duty to take enforcement action, from improvement notices to prohibition orders.
Can my council inspect my rented home for hazards?
Yes. Ask the council's private sector housing team for an inspection. If a Category 1 hazard is found the council must act, and serving an improvement notice protects against section 21 eviction for six months.
What happens if a landlord ignores an improvement notice?
Non-compliance is an offence carrying an unlimited fine or a civil penalty of up to £30,000, and can feed into rent repayment orders and banning orders for repeat offenders.
What are the new HHSRS case studies for?
They provide model assessments for all 21 hazards, replacing the 2004 worked examples, so assessors score consistently and landlords, agents and tenants can see how deficiencies translate into hazard categories.
SOURCES
- GOV.UK: HHSRS case studies – accessed 30 July 2026
- GOV.UK: Housing Health and Safety Rating System guidance – accessed 30 July 2026
- legislation.gov.uk: Housing Act 2004 Part 1 – accessed 30 July 2026
