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Data Provider: Welsh Government National Statistics Assessments and resolved hazards by area, type of assessment and dwelling
Area Code[Filter]
AssessmentBoth the total number of assessments and the number of Category 1 resolutions are only available from 2009-10 onwards.<br /><br />Similarly, the number of Category 2 hazards found in HMOs was only collected from 2008-09 onwards. <br /><br />An HMO or non-HMO with both Category 1 and 2 hazards is counted in both rows. An HMO or non-HMO with multiple Category 1 hazards is only counted in the Category 1 row once, similarly for an HMO or non-HMO with multiple Category 2 hazards.<br /><br />Only initial assessments are included in the total number of assessments. [Filter]
[Collapse]DwellingFor the purposes of this data collection an HMO means a house in multiple occupation as defined in sections 254 to 259 of the Housing Act 2004, as a building or part of a building which: (<br />i) Meets the standard test; <br />(ii) Meets the self-contained flat test; <br />(iii) Meets the converted building test; <br />(iv) Has a HMO declaration in force; or <br />(v) Is a converted block of flats [Filter]
Dwelling 1
[Collapse]Total assessments[Collapse]Assessments which: Contained category 1 hazards[Collapse]Assessments which: Contained category 2 hazards[Collapse]Number of HMOs and non-HMOs where all category 1 hazards have been resolved as a result of local authority action
[Collapse]TotalClick here to sortTotal[Collapse]TotalClick here to sortTotal[Collapse]TotalClick here to sortTotal[Collapse]TotalClick here to sortTotal
Click here to sortNon-HMOsClick here to sortHMOsClick here to sortNon-HMOsClick here to sortHMOsClick here to sortNon-HMOsClick here to sortHMOsClick here to sortNon-HMOsClick here to sortHMOs
Isle of Anglesey22160281155311861905024035641
Neath Port Talbot8721921,0645138860137911449340474478
Vale of Glamorgan2016826982311131956626139544
Rhondda Cynon Taf5275441,0713577743438551089523866304
Merthyr Tydfil1463317951197014128169351752
Blaenau Gwent2179226115612114781551006106



Assessments and resolved hazards

Last update

7 March 2024 7 March 2024

Next update

December 2024

Publishing organisation

Welsh Government

Source 1

Hazards and licences data collection, Welsh Government

Contact email


National Statistics

Lowest level of geographical disaggregation

Local authorities

Geographical coverage


Languages covered

English and Welsh

Data licensing

You may use and re-use this data free of charge in any format or medium, under the terms of the Open Government License - see

General description

The information presented here covers the condition of residential properties, including Houses in Multiple Occupation (HMOs), assessed by local authorities under the Housing Health and Safety Rating System (HHSRS).

The Housing Health and Safety Rating System (HHSRS) is used to determine whether residential premises are safe to live in. It replaced the Fitness Standard in July 2006. Local authorities use the System to determine whether a hazard exists that may cause harm to the health and safety of a potential occupant. Hazards are divided into two categories. Those which score high on the scale (and therefore the greatest risk) are called Category 1 hazards. Those that fall lower down the scale and pose a lesser risk are called Category 2 hazards. Where a condition is classified as a Category 1 hazard the local authority has a duty to take the appropriate enforcement action. If it poses a Category 2 hazard the local authority may take enforcement action.

Data collection and calculation

The information presented here is collected via annual returns from Welsh planning authorities on Hazards & Licences during each year.

Frequency of publication


Data reference periods

Data are shown for each financial year from 2006-07.

Note that, due to the Coronavirus (COVID-19) pandemic in 2020, data on housing hazards and licences in Wales for 2019-20 were not collected.

Users, uses and context

Please find this information in the related statistical publication, as per the given weblink.

Rounding applied


Revisions information


Statistical quality

Please find this information in the related statistical publication, as per the given weblink.


Housing, Hazards, Licences, Houses in Multiple Occupation, (HMOs), Category 1, Category 2