Lionel-Lim/tax-map

An interactive map comparing Council Tax with an illustrative annual property tax across England.

TypeScript

0

14 commits

updated Oct 4, 2026

See the code

See what people are saying

README

Tax Map

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:

npm ci
npm run dev

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.

Lionel-Lim/tax-map

An interactive map comparing Council Tax with an illustrative annual property tax across England.

TypeScript

0

14 commits

updated Oct 4, 2026

See the code

See what people are saying

README

Tax Map

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:

npm ci
npm run dev

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.

Languages

TypeScript

45.1%

Python

26.1%

Svelte

20.9%

CSS

5.1%

JavaScript

2.7%