Data published by Basement Excavation Cost
2 datasets, each derived from named sources' own pages and re-read on a cadence, latest 2026-09-26.
| Dataset | Median | Sources | Read |
|---|---|---|---|
| UK Basement Price Index | 2,800 GBP | 13 of 33 read | 2026-09-26 |
| UK Construction Cost Series | 1.1 % | 6 of 5 read | 2026-09-26 |
How these are made
Every dataset starts as a charter that names the buyer's question and the sources by URL. The estate's 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. 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.
UK Basement Price Index
The median published figure in the UK Basement Price Index is 2,800 GBP across 13 figures from 10 sources' own pages (range 1,000 to 7,200 GBP), read 26 September 2026.
10 of the 33 named sources read in full publish a figure; 23 publish none, read 26 September 2026.
Download the CSV (13 rows) · JSON · Markdown
UK Construction Cost Series
The median published figure in the UK Construction Cost Series is 1.10 percent across 6 figures from 2 sources' own pages (range 0.10 to 4.90 percent), read 26 September 2026.
2 of the 5 named sources read in full publish a figure; 3 publish none, read 26 September 2026.
Download the CSV (6 rows) · JSON · Markdown