{"schemaVersion":"1.0","id":"warm-boroughs-and-cold-ones","dataset":"epc-by-borough","title":"Warm boroughs and cold ones","description":"Tower Hamlets is nearly twice as efficient as Richmond, and that is a story about age.","methodology":"Share of a borough's domestic certificates rated band C or better. The ranking tracks the age and type of the stock rather than anything about the people in it: boroughs of recent high-density flats rate well, boroughs of Victorian and Edwardian houses rate badly, and a new flat is easier to heat than a large old house. Same caveat as the register overall — certificates are lodged on sale or let, so this describes the transacted stock rather than every home.","category":"environment","categoryLabel":"Environment","cadence":"monthly","placeholder":false,"landingPage":"https://londongraph.com/g/warm-boroughs-and-cold-ones","markdown":"https://londongraph.com/g/warm-boroughs-and-cold-ones/index.html.md","source":{"name":"MHCLG","url":"https://get-energy-performance-data.communities.gov.uk/","licence":"Open Government Licence v3.0","licenceUrl":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"},"updatedAt":"2026-10-16T03:15:49.461Z","release":{"label":null,"publishedAt":null,"resourceUrl":null,"methodologyUrl":null,"sha256":null},"observations":[{"series":"","buckets":["Tower Hamlets","City of London","Hackney","Southwark","Greenwich","Islington","Westminster","Newham","Wandsworth","Camden","Hammersmith and Fulham","Hounslow","Brent","Lambeth","Lewisham","Barnet","Ealing","Kensington and Chelsea","Barking and Dagenham","Sutton","Haringey","Hillingdon","Croydon","Merton","Harrow","Waltham Forest","Kingston upon Thames","Bexley","Havering","Bromley","Redbridge","Enfield","Richmond upon Thames"],"values":[75.6,63.7,62.2,60.5,58.8,58.5,55.9,55.9,53.7,52.5,52.4,52.4,51.3,51,50.9,49.6,48.8,46.8,46.8,45.3,45.1,44.6,44.5,44.5,44.3,44,42.5,40.8,40.6,40.4,39.9,39.7,38.9],"unit":"% rated C or better","metadata":[{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}]}],"areaStatistics":null,"visualizations":[{"id":"geography","label":"Map","description":"Compare the same measure geographically.","url":"https://londongraph.com/g/warm-boroughs-and-cold-ones","renderer":"spatial","default":true,"timeControl":"inherit","datasets":[],"transform":null,"controls":null,"metrics":[{"key":"value","label":"Certificates rated C or better","unit":"%"}],"caveat":null},{"id":"overview","label":"Overview","description":"Tower Hamlets is nearly twice as efficient as Richmond, and that is a story about age.","url":"https://londongraph.com/g/warm-boroughs-and-cold-ones?view=overview","renderer":"primary","default":false,"timeControl":"inherit","datasets":[],"transform":null,"controls":null,"metrics":[],"caveat":null},{"id":"distribution","label":"Distribution","description":"Place every mapped area in the selected measure's distribution while preserving missing values.","url":"https://londongraph.com/g/warm-boroughs-and-cold-ones?view=distribution","renderer":"area-distribution","default":false,"timeControl":"inherit","datasets":[],"transform":null,"controls":null,"metrics":[],"caveat":null}],"availability":"observations","note":"The release is complete for the measures represented on the graph page."}