The Housing Health and Safety Rating System, How HHSRS Works

What is HHSRS?

The Housing Health and Safety Rating System (HHSRS) is the statutory method used by local housing authorities in England and Wales to assess potential risks to health and safety arising from deficiencies in residential properties. It was introduced under the Housing Act 2004 and replaced the earlier Housing Fitness Standard.

HHSRS does not define minimum standards, it is a risk-based scoring system. Inspectors assess the likelihood of harm occurring and the probable severity of that harm across 29 defined hazard categories.

The 29 Hazard Categories

HHSRS covers hazards spanning physiological, psychological, infection, and accident risks. The 29 categories include:

• Damp and mould growth
• Excess cold and excess heat
• Falls on stairs, falls on level surfaces, falls between levels
• Electrical hazards
• Fire and flames
• Carbon monoxide and fuel combustion products
• Structural collapse and falling elements
• Noise, crowding and space, entry by intruders, lighting, and domestic hygiene

Category 1 vs Category 2 Hazards

Once an inspector has scored a hazard, it is classified as either Category 1 or Category 2 based on its calculated score.

Where a Category 1 hazard is identified, the local authority has a legal duty to take the most appropriate enforcement action. This can range from serving an improvement notice to prohibiting occupation of part or all of the property.

Who Can Request an Inspection?

Tenants can request that their local housing authority carry out an HHSRS inspection if they believe there is a serious hazard in their rented property. The council has a duty to inspect if a complaint is made. Owner-occupiers do not have the same right to request an inspection, as HHSRS is primarily a regulatory tool for the private rented sector.

HHSRS and Landlord Obligations

Landlords in England and Wales have an obligation to keep their properties free from Category 1 hazards. If a council serves an improvement notice, the landlord must carry out the specified works within the stated timescale, typically 28 days or more, depending on the nature of the hazard.

Failure to comply can result in significant civil penalties, prosecution, and, in cases of serious neglect, a Rent Repayment Order, which allows tenants to reclaim up to 12 months' rent.

HHSRS and Property Transactions

Buyers of investment properties and landlords acquiring houses in multiple occupation (HMOs) should be aware of any outstanding HHSRS improvement notices registered against the property. These will typically be revealed during local authority searches. Property Passport UK surfaces publicly available data including planning history and local authority records that can indicate whether a property has been subject to enforcement action.

The Most Common Category 1 Hazard

Excess cold consistently emerges as the most commonly identified Category 1 hazard in the private rented sector. Poor insulation, inadequate heating systems, and draughty windows all contribute to properties falling below the HHSRS threshold for thermal comfort. This hazard is closely linked to damp and mould, cold surfaces cause condensation, which in turn leads to mould growth and further health risks.