GitHub - Lionel-Lim/tax-map: An interactive map comparing Council Tax with an illustrative annual property tax across England.

GitHub

1 min read Original article ↗

Explore how an illustrative property-tax reform could affect a typical home in England. Compare Council Tax with an annual property tax, adjust the rate, and optionally include Stamp Duty.

Try the live demo

Tax Map showing the England map and a Leicester comparison

Stack

  • SvelteKit (static build)
  • MapLibre GL JS
  • Python (offline data pipeline)

Development

Use Node.js 22.14.0 or newer:

Open the local URL printed by Vite. The data is included; no API keys are needed.

Useful commands:

npm run check
npm test
npm run build

See CONTRIBUTING.md for the full checks and pipeline/README.md to rebuild datasets.

Data and credits

Uses official data from ONS, HM Land Registry, VOA/HMRC and MHCLG. Some areas have no usable estimate. Results are illustrative, not personal tax advice.

See the methodology and data licences and attribution.

Licence

MIT for original code and documentation. Data, map assets and dependencies retain their own licences.