Housing Health and Safety Rating System

The Housing Health and Safety Rating System (HHSRS) is the risk-based evaluation tool used by local housing authorities in England to identify and score potential health and safety hazards in residential properties, introduced under the Housing Act 2004 and in operation since April 2006. It replaced the previous Housing Fitness Standard with a scoring methodology that assesses both the likelihood of harm and its potential severity, rather than applying a single pass/fail threshold. As gov.uk guidance for landlords sets out, HHSRS does not define minimum standards, it is concerned with identifying and minimising hazards.

From working with self-managing landlords across the UK, we find that HHSRS is one of the least understood regulatory frameworks in the private rented sector. Most landlords encounter it for the first time when a tenant has already complained to the council, by which point a formal inspection is often already underway.

The 29 hazards

HHSRS assesses 29 defined hazard types, grouped into four broad categories in the operating guidance:

Physiological requirements - excess cold, excess heat, damp and mould growth, domestic hygiene and pests, food safety, and personal hygiene.

Psychological requirements - crowding and space, entry by intruders, lighting, and noise.

Protection against infection - domestic hygiene, sanitation and drainage, water supply, and waste management.

Protection against accidents - falls on stairs and steps, falls on the level, falls between levels, electrical hazards, fire, flames and hot surfaces, collision and entrapment, explosions, and structural collapse.

Excess cold and damp and mould are consistently the most common Category 1 hazards identified in private rented properties, and they are also the hazards most directly affected by recent legislative changes.

Category 1 and Category 2 hazards

The HHSRS scoring process produces a numerical band rating from A to J. Bands A through C are designated Category 1 hazards, the most serious, where the local authority has a statutory duty to take enforcement action. Bands D to J are Category 2 hazards, where the council has a power to act but is not required to do so.

In practice, a Category 1 finding will typically result in an improvement notice being served on the landlord, specifying the works required and the timescale for completion. More serious or urgent findings can lead to emergency remedial action (where the council carries out works and recharges the cost to the landlord), a prohibition order restricting use of the property, or civil penalty notices of up to £30,000.

What happens during an HHSRS inspection

An inspection is carried out by an environmental health officer from the local authority, typically following a complaint from a tenant or a proactive area survey. The officer assesses each potential hazard by making two judgements: the likelihood of an occurrence causing harm to a typical vulnerable occupant within the next 12 months, and the range of probable harm outcomes from such an occurrence. The two judgements are combined to produce a hazard score, which determines the band rating and therefore the category of the hazard.

The inspection covers the structure and fabric of the building, associated outbuildings and means of access, as well as internal conditions. Hazards caused entirely by the behaviour of occupants, rather than by deficiencies in the property itself, fall outside the scope of HHSRS.

Landlords using August consistently tell us that having a timestamped record of maintenance requests, reported defects, and remediation steps is the most effective way to demonstrate that they have responded appropriately before an inspection takes place. August's maintenance reporting feature creates exactly that kind of contemporaneous evidence trail.

HHSRS, the Renters' Rights Act, and the Decent Homes Standard

From 1 May 2026, the Renters' Rights Act extends the Decent Homes Standard to the private rented sector, with full enforcement expected from 2035. HHSRS scoring forms the primary assessment framework under the DHS: a property fails the Decent Homes Standard where it contains a Category 1 hazard under HHSRS, or where other DHS criteria are not met. The government's July 2025 consultation confirmed that damp and mould will be treated as a failure at HHSRS bands A to H, a significantly lower threshold than the existing Category 1 boundary at bands A to C.

Awaab's Law, which introduced mandatory investigation and repair timescales for damp and mould in social housing from October 2025, is expected to be extended to the private rented sector, bringing additional time-bound obligations alongside the HHSRS framework. For practical guidance on what landlords must do when a property has damp or mould under the new timelines, see our guide to preventing damp and mould under Awaab's Law.

Frequently asked questions

Does HHSRS apply to all rental properties in England? 

Yes. HHSRS applies to all residential properties in England, including private rented homes, social housing, HMOs, and owner-occupied properties. In practice, the majority of formal HHSRS inspections are carried out in the private rented sector, as the Commons Library notes this is the sector with the highest proportion of substandard housing stock. Local authorities have a duty to keep housing conditions in their area under review and must inspect a property on request when a serious hazard is suspected.

Can a landlord be fined as a result of an HHSRS inspection? 

Yes. Where a Category 1 hazard is found and the landlord fails to comply with an improvement notice within the specified timescale, the local authority may carry out the works itself and recharge the costs, serve a civil penalty notice of up to £30,000, or pursue prosecution. Repeat or serious non-compliance can also result in a rent repayment order allowing tenants to recover up to 12 months' rent, and entry on the national landlord database.

What is the difference between HHSRS and the Decent Homes Standard? 

HHSRS is the scoring tool local authorities use to assess individual hazards in a property. The Decent Homes Standard is a broader set of property standards that uses HHSRS as its primary hazard assessment method, a property cannot meet the DHS if it contains a Category 1 HHSRS hazard. The DHS also covers broader criteria such as thermal comfort, modern facilities, and the overall condition of the building fabric.

How long does a landlord have to fix a Category 1 hazard? 

An improvement notice served following a Category 1 finding must specify a start date no earlier than 28 days from service, and a completion date that gives reasonable time for the works. Where there is an imminent risk of serious harm, the council may serve an emergency remedial action notice and begin works immediately, recovering costs from the landlord afterwards.