Data published by Building Safety Levy Calculator
2 datasets, each derived from named sources' own pages and re-read on a cadence, latest 2026-10-28.
| Dataset | Headline figure | Sources | Read |
|---|---|---|---|
| BSL Liability and Exemptions | 50 to 50 % | 2 of 18 read | 2026-10-28 |
| BSL Rates by Local Authority | 16.88 to 58.29 GBP | 13 of 28 read | 2026-10-28 |
How these are made
Every dataset starts as a charter that names the buyer's question and the sources by URL. Our fetch service reads each source's own page, and the sentence carrying the figure is kept exactly as printed, with the page and the day it was read.
A reviewer accepts or refuses every candidate sentence with the reason recorded, and the derivation is computed over one figure per source, or one for each breakdown a source prices. A source read in full that publishes nothing is counted as not published, never filled in. Each dataset is re-read on its cadence, so the next read reports what moved.
BSL Liability and Exemptions
The BSL Liability and Exemptions carries 1 published figure read from 1 source's own page, from 50 to 50 percent, read 28 October 2026.
2 of the 18 named sources read in full publish a figure; 16 publish none, read 28 October 2026.
Download the CSV (2 rows) · JSON · Markdown
BSL Rates by Local Authority
The BSL Rates by Local Authority carries 13 published figures read from 13 sources' own pages, from 16.88 to 58.29 GBP, read 28 October 2026.
13 of the 28 named sources read in full publish a figure; 15 publish none, read 28 October 2026.
Download the CSV (13 rows) · JSON · Markdown