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Accommodation certificates - standards


Overcrowding standard

A property is considered to be overcrowded if either the room standard or the space standard is exceeded.

Room standard

There should be sufficient rooms in each individual letting so that no male and female aged 12, or over, should have to sleep in the same room, unless they are living together as ‘husband and wife’.

Number of rooms Maximum number of people
1 2
2 3
3 5
4 7.5
5 or more  2 for each room


Space standard

The standard specifies the maximum number of people who can sleep in any room considered suitable for use as a sleeping room and the maximum number who may sleep in any individual letting when taking into account the number of sleeping rooms available to the occupants.

Floor area of the room

Maximum number of people

10.2 m.sq. or more 2
Between 8.3m.sq. and 10.2m.sq. 1.5
Between 6.5m.sq. and 8.3m.sq. 1
Between 4.6m.sq. and 6.5m.sq. 0.5


Fitness for habitation

The Housing Act 2004 and The Housing Health and Safety Rating System (England) Regulations introduced a new fitness standard. The test of fitness is now an evidence – based risk assessment process (HHSRS).The aim of the new Rating system is to minimise the risks posed to occupiers, potential occupiers and visitors . The assessment includes outbuildings, gardens, yards, amenity space and means of access.

The Hazards covered are as followed:

  • Excess cold; damp and mould growth
  • Fire and electrical hazards
  • Carbon monoxide and fuel combustion products
  • Crowding and space
  • Entry by intruders
  • Noise
  • Domestic hygiene, pests and refuse
  • Food safety
  • Personal hygiene, sanitation and drainage
  • Water supply for domestic purposes
  • Structural collapse and falling elements
  • Collision and entrapment
  • Falls associated with baths; stairs and steps; between levels and on the level.

The HHSRS assessment includes twenty-nine categories of housing hazard providing a rating for each hazard. It does not provide a single rating for the dwelling as a whole. The hazard rating is expressed though a numerical score which falls within a band. There are 10 bands. Hazards with scores in Bands A to C will be Category 1 hazards, and those with scores in Bands D to J will be Category 2 hazards. The HHSRS assessment is based on the risk to the potential occupant most vulnerable to that hazard. For example, stairs constitute a greater risk to the elderly, so for assessing hazards relating to stairs they are considered the most vulnerable group.


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