# What grade

> Almost everything listed is Grade II.

- Category: Housing
- Cadence: monthly
- Status: Published on a monthly cadence.
- Dataset key: `heritage-grades`
- Source: [MHCLG](https://www.planning.data.gov.uk/)
- Licence: Open Government Licence v3.0 — [terms](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)
- Canonical page: [https://londongraph.com/g/what-grade](https://londongraph.com/g/what-grade)
- Machine-readable record: [https://londongraph.com/data/what-grade](https://londongraph.com/data/what-grade)

## Methodology

London's listed buildings by grade. Grade I is exceptional interest, Grade II* particularly important, Grade II of special interest — and the last accounts for the overwhelming majority everywhere, which is why a Grade I listing is the rarity it is. A small number of entries carry no grade in the register and are shown as such rather than folded into Grade II.

## Visualisations

- [Composition](https://londongraph.com/g/what-grade): Almost everything listed is Grade II.
- [Ordered shares](https://londongraph.com/g/what-grade?view=ordered-share): Compare every part on one common 0–100 scale.
- [Treemap](https://londongraph.com/g/what-grade?view=treemap): Use area to show each category's contribution to the total.

## Citation guidance

Attribute the original publisher named above and identify LondonGraph as the visualisation and methodology layer. Do not describe live values as a historical census, and do not present placeholder values as observations.