Energy performance and the presence of hazards in dwellings

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Standard shorthand is used in this table: [t] = total.

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Data valuesData descriptionAreaYearIndicatorBreakdown
80.602Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsOwner-occupied
76.377Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsPrivate rented
93.191Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsSocial Housing
82.266 [t]Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsAll tenures
65.621Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardspre 1919
79.276Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazards1919 to 1944
85.618Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazards1945 to 1964
86.13Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazards1965 to 1980
95.217Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsPost 1980
82.266 [t]Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsAll ages
79.858Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsEnd terrace
77.288Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsMid terrace
85.722Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsSemi detached
79.409Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsDetached
91.164Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsFlat
82.266 [t]Percentage of dwellingsWales2017-18Percentage of dwellings which are free from hazardsAll types
42.211Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performanceOwner-occupied
42.288Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performancePrivate rented
69.173Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performanceSocial Housing
46.997 [t]Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performanceAll tenures
19.566Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performancepre 1919
33.034Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performance1919 to 1944
44.845Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performance1945 to 1964
52.229Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performance1965 to 1980
78.001Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performancePost 1980
46.997 [t]Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performanceAll ages
40.989Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performanceEnd terrace
52.164Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performanceMid terrace
44.138Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performanceSemi detached
40.096Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performanceDetached
68.934Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performanceFlat
46.997 [t]Percentage of dwellingsWales2017-18Percentage of dwellings with adequate energy performanceAll types
78.376Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsOwner-occupied
71.873Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsPrivate rented
91.141Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsSocial Housing
80.584 [t]Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsAll tenures
61.552Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardspre 1919
73.127Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazards1919 to 1944
81.701Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazards1945 to 1964
82.762Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazards1965 to 1980
93.205Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsPost 1980
80.584 [t]Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsAll ages
74.514Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsEnd terrace
73.117Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsMid terrace
82.778Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsSemi detached
75.986Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsDetached
87.751Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsFlat
80.584 [t]Lower Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsAll types
39.396Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceOwner-occupied
36.515Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performancePrivate rented
65.361Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceSocial Housing
44.81 [t]Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceAll tenures
15.819Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performancepre 1919
25.694Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performance1919 to 1944
39.474Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performance1945 to 1964
47.705Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performance1965 to 1980
74.245Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performancePost 1980
44.81 [t]Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceAll ages
34.267Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceEnd terrace
47.25Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceMid terrace
40.122Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceSemi detached
35.771Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceDetached
63.368Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceFlat
44.81 [t]Lower Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceAll types
82.828Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsOwner-occupied
80.881Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsPrivate rented
95.241Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsSocial Housing
83.948 [t]Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsAll tenures
69.689Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardspre 1919
85.425Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazards1919 to 1944
89.534Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazards1945 to 1964
89.498Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazards1965 to 1980
97.23Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsPost 1980
83.948 [t]Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsAll ages
85.202Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsEnd terrace
81.458Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsMid terrace
88.666Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsSemi detached
82.832Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsDetached
94.577Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsFlat
83.948 [t]Upper Confidence Interval (%)Wales2017-18Percentage of dwellings which are free from hazardsAll types
45.026Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceOwner-occupied
48.06Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performancePrivate rented
72.985Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceSocial Housing
49.184 [t]Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceAll tenures
23.314Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performancepre 1919
40.375Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performance1919 to 1944
50.216Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performance1945 to 1964
56.753Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performance1965 to 1980
81.757Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performancePost 1980
49.184 [t]Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceAll ages
47.711Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceEnd terrace
57.078Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceMid terrace
48.155Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceSemi detached
44.422Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceDetached
74.5Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceFlat
49.184 [t]Upper Confidence Interval (%)Wales2017-18Percentage of dwellings with adequate energy performanceAll types

Next update expected:This dataset is not expected to be updated, but is expected to be replaced in the future

Updates

6th January 2026
Dataset first published.

Main information

Designation
Accredited official statistics
Data provider
Welsh Government
Data source
Welsh Housing Conditions Survey

Overview

Summary of dataset and variables

The Welsh Housing Conditions Survey (WHCS) collects information about the condition and energy efficiency of all types of housing in Wales. These are the first set of housing conditions results for Wales since the last survey in 2008. Key data gathered in the WHCS includes information about energy efficiency, cost of repair, the Welsh Housing Quality Standard (WHQS), fuel poverty and the Housing Health and Safety Rating System (HHSRS). For full details of the topics included in the survey please see the survey form, available on the WHCS website. Data from the WHCS underpin two of the 46 National Well-being Indicators for Wales, specifically homes free from hazards (Indicator 31) and homes with adequate energy efficiency (Indicator 33).

Data collection or calculation

WHCS fieldwork ran from August 2017 to April 2018. Property inspections were carried out by qualified surveyors, who performed visual assessments of the interior and exterior of properties. For full details of the topics included in the survey please see the survey form, available on the WHCS website. A sample of addresses was drawn from eligible households taking part in the National Survey for Wales 2017-18. A total of 2,549 full WHCS surveys were achieved across the 22 local authorities in Wales, which enables national level estimates. Like any figures based on a survey, these results are subject to margins of error. The margins of error (“confidence intervals”) are shown for each result. These give a range within which the true value is likely to fall.

The results of the WHCS are weighted to compensate for unequal selection probabilities and differential non-response (e.g. to ensure that the tenure distribution of the final dataset matches that of the Welsh population).

Energy efficiency of dwellings: The Standard Assessment Procedure (SAP) is the methodology used by the Government to assess and compare the energy and environmental performance of dwellings. SAP works by assessing how much energy a dwelling will consume, when delivering a defined level of comfort and service provision. The assessment is based on standardised assumptions for occupancy and behaviour. This enables a like-for-like comparison of dwelling performance. The ratings are expressed on a scale between 1 and 100, where 100 represents no energy cost. The ‘SAP 2012’ methodology was used in the Welsh Housing Conditions Survey 2017-18. (see the Glossary on the WHCS webpage.) Housing Health and Safety Rating System: The Housing Health and Safety Rating System (HHSRS) is a risk-based evaluation tool to help local authorities identify and protect against potential risks, and hazards, to health and safety from any deficiencies identified in dwellings. It is used to determine whether residential premises are safe to live in, or whether a hazard exists that may cause harm to the health and safety of a potential occupant. The System assesses 29 types of housing hazard and provides a rating for each one. Those which score high on the scale (and are therefore the greatest risk) are called category 1 hazards – if, after a local authority inspection, a dwelling contains a category 1 hazard the local authority has a duty to take the appropriate enforcement action. Those that fall lower down the scale and pose a lesser risk are called category 2 hazards – when these occur the local authority may take enforcement action. Full details of the measurement and modelling of these hazards can be found in the WHCS Technical Report on the WHCS webpage.

Statistical quality

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

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Published by

Organisation
Welsh Government
Contact email
stats.housing@gov.wales

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