EPC Area Insights: Energy Ratings by Postcode District

See where the least energy-efficient homes and commercial buildings are, anywhere in England and Wales. Official energy performance certificate (EPC) data, turned into one row per postcode district, council or constituency: how many buildings are rated A to G, and what share are D to G.

Every home or building that is sold, let or built needs an EPC, and every certificate is registered with the government. This Actor reads those certificates for the areas you choose and tells you, district by district, where poorly rated buildings are concentrated. That is exactly where insulation, heat pumps, solar panels, new windows and energy advice are needed.

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At a glance

You give it	Councils or parliamentary constituencies in England and Wales
You get	One row per postcode district, council or constituency: how many buildings are rated A to G
Price	$0.02 per area analysed (you only pay for results)
Data source	Official Energy Performance of Buildings Register (area statistics only, no addresses)
Best for	Solar, insulation and heat pump installers choosing where to market

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Who it is for

• Solar, heat pump, insulation and window installers choosing where to leaflet, advertise or open a branch
• Energy consultants and retrofit coordinators sizing up local demand
• Letting agents and landlords tracking how their area compares
• Councils, housing associations and researchers monitoring energy efficiency
• Marketing agencies planning door-drops and local ad targeting

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What you get for each area

Field	What it means
area, area_type	A postcode district (e.g. BS9), council or constituency
within	The council or constituency it was searched in
building_type	Homes (domestic) or commercial (non-domestic)
certificates	Certificates registered in the area in your period
band_a … band_g	How many were rated A, B, C, D, E, F and G
share_band_a … share_band_g	The same as shares (0 to 1)
share_d_to_g, share_e_to_g, share_f_to_g	The share of buildings that would benefit most from improvements
share_a_to_c	The share already efficient
most_common_band	The typical rating in the area
certificates_per_month	How active the local property market is
new_build_share	Homes only: how much of the activity is new builds
period_start, period_end	The period covered

No addresses, ever. The EPC licence restricts address-level data to specific purposes, so this Actor only returns area statistics. No addresses, property references, full postcodes or certificate numbers are output.

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How to use it (step by step)

1. Choose your areas

Type councils (e.g. Bristol, Manchester, Cornwall) and/or parliamentary constituencies (e.g. Bristol East). Plain names are fine: the Actor matches them to the official list, and if a name is ambiguous (like Newcastle) it tells you the options.

2. Choose buildings and detail

• Buildings: homes, commercial, or both.
• One row per: postcode district (most detailed), council or constituency.
• Period: the last N months (default 12), or exact dates.

3. Click Start

Most runs finish in seconds. Sort by share_d_to_g to find your best areas, then export to Excel, CSV or JSON.

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Ready-made examples

Where are the least efficient homes in Bristol and Manchester?

{ "councils": ["Bristol", "Manchester"], "groupBy": "postcode_district", "monthsBack": 12 }

Commercial buildings in Leeds, last 2 years, one row per council

{ "councils": ["Leeds"], "buildingType": "non_domestic", "groupBy": "council", "monthsBack": 24 }

Compare constituencies

{ "constituencies": ["Bristol East", "Bristol West", "Bristol North West", "Bristol South"], "groupBy": "constituency" }

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Sample output

One row from a real run, trimmed to the main fields. Every field is described above.

{
  "area": "Leeds",
  "area_type": "council",
  "building_type": "domestic",
  "certificates": 21853,
  "share_a_to_c": 0.656,
  "share_d_to_g": 0.344,
  "share_f_to_g": 0.007,
  "most_common_band": "C",
  "certificates_per_month": 1681,
  "new_build_share": 0.082
}

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One-click examples

Open one of these ready-made tasks, check the inputs, and click Start. Each is a good starting point you can change.

• Least efficient homes in Bristol, by district
• Least efficient homes in Manchester, by district
• EPC ratings across London boroughs
• Cornwall homes by energy rating
• Commercial buildings in Leeds by EPC rating
• Least efficient homes in Birmingham, by district
• Home energy ratings in Cardiff and Swansea
• Home energy ratings across Yorkshire councils
• Compare Bristol's constituencies by EPC rating
• Least efficient homes in Newcastle, by district

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Pricing

Event	Price
Area analysed	$0.02

For example, 20 areas cost $0.40.

You pay per area analysed. Areas with fewer certificates than your minimum (default 20) are skipped and free, because shares from tiny samples mislead. A council with no certificates in the period is free.

No account or API key needed. Works with AI agents, including x402 pay-per-call payments.

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Honest limits

• England and Wales only. Scotland and Northern Ireland keep separate registers.
• It describes certificates registered in your period, which means buildings recently sold, let, built or assessed. It's a strong guide to local housing stock, not a census of every building.
• Districts are taken from each certificate's postcode, within the council you searched. A district that crosses a council boundary appears once per council.
• Certificates are added daily. Today's are available from tomorrow.

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Data and licence

Energy performance of buildings data, England and Wales, published by the Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. This Actor returns area statistics only: no address-level data.

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FAQ

Can I get the addresses of the poorly rated homes? No. The EPC licence restricts address data to specific purposes such as property management, research and government schemes, and selling it as leads would need separate licences. Use the district statistics to target your marketing instead.

Which council names can I use? Any of the 318 councils and 575 constituencies the register recognises. If a name isn't recognised, the run tells you the closest matches.

Something is wrong or missing. Open an issue on the Issues tab with your run link.