Methodology
Version 1.2 · effective 2026-08-15
Every figure on this site comes from a definition below. Each carries its formula, its source series, how often it moves, how it is classified, and where it stops being reliable.
Provenance classes
How these figures were produced
- Observed — Recorded directly from the cited source series, unadjusted.
- Modelled — Derived arithmetically from observed inputs using the published method; not a market quote.
- Baseline seed — A documented starting estimate awaiting first observation. Treat as an order-of-magnitude figure only.
Revision log
v1.0 ·
Shared Buildlor method scaffold published: provenance classes, the anti-doorway publishability gate, and the append-only observation series.
Method changes are versioned here. Data corrections are logged separately.
Questions about the method
Where do the numbers come from?
Every published figure is either observed from a cited primary source, modelled arithmetically from observed inputs using the formula shown on the page, or labelled as a documented baseline seed awaiting first observation.
Can a sponsor change a published figure?
No. Sponsors buy placement, never data. Sponsored blocks are labelled, and the trust pages carry no paid placement at all.
Are old observations ever deleted?
Never. The observation series is append-only, so any past value stays reconstructable and the published history lengthens every quarter.
Not advice — Buildlor is a data publisher. We do not bid, price, estimate, or build work, and nothing here is a quote, a tender price, or construction advice. Figures are indicative order-of-magnitude benchmarks for early budgeting and must be confirmed by a qualified cost consultant, quantity surveyor, or general contractor before you rely on them. About Buildlor