UK EPC Explorer

A fast, clean interface for searching and exploring UK Energy Performance Certificate (EPC) data. Search by postcode, local authority, or rating — and drill into full certificate details for any property in England and Wales.

Live demo: epc.homestocompare.com

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Features

• Search by postcode, local authority, EPC rating (A–G), and year
• Unique URLs for every search and certificate — bookmarkable and shareable
• Detail pages for each certificate showing running costs, CO₂ emissions, building fabric, heating, and improvement potential
• Links to the official EPC Register so data can be independently verified
• No server required — all data fetched directly from the public EPC API

Data source

Data is sourced from the Energy Performance of Buildings Register, published by the Department for Energy Security and Net Zero. Licensed under the Open Government Licence v3.0.

API credentials

The EPC Register API is free but requires registration. Sign up here — it takes under a minute. Enter your email and API key in the app; they are stored only in your browser's localStorage and never sent anywhere except the EPC API directly.

Running locally

git clone https://github.com/RealEstateWebTools/uk-epc-explorer.git
cd uk-epc-explorer
npm install
npm run dev

Open http://localhost:3000.

Running tests

npm test

207 tests across 5 suites covering utilities, rendering, API logic, routing, and detail page assembly.

Deploying to Cloudflare Pages

Via GitHub (recommended):

1. Fork or push to your own GitHub repo
2. Go to Cloudflare Pages → Workers & Pages → Create → Connect to Git
3. Select the repo, set build output directory to ., leave build command blank
4. Deploy

Via CLI:

npx wrangler pages deploy . --project-name uk-epc-explorer

Tech

Pure HTML, CSS, and vanilla ES modules — no framework, no bundler, no build step. Tests run with Vitest + jsdom.

Licence

Code: MIT. EPC data: Open Government Licence v3.0.