Data endpoints

/* The UK closing state: every one of its prose pages hands the reader back into the product rather than dead-ending. Outside the prose block, per §2. */ after=

There is no server and there are no query parameters. Every endpoint is a static JSON file served from the filesystem, immutable for the life of a build, and safe to cache hard. Every statistical page on this site links its own JSON in its head (link rel="alternate" type="application/json") and in its Cite us section, so the fastest route to a page’s data is the page itself.

The current build is dataset 2026-07: 983,157 HDB resales from January 1990 to July 2026, and 135,166 private sale caveats over URA's rolling window.

Endpoints

• /data/index.json: the national figures, the region and area lists, the flat types, the methodology object, and the coverage tables.
• /data/quality.json: every check the pipeline ran for this build, with its result, plus the source register descriptions.
• /data/rankings/index.json and /data/rankings/{slug}.json: the league tables, with every disclosure field (total_shown, total_ranked, window_months, exclusions).
• /data/compare/index.json and /data/compare/{a}-vs-{b}.json: the published pairs, each side carrying the mix-adjusted rate and interval the verdict is computed on.
• /data/search-index.json: the search rows the in-site search ranks over.

The index, from this build

This example is rendered from the live file, not typed: the values below are the current build’s own.

GET /data/index.json
{
  "dataset_version": "2026-07",
  "data_anchor": "2026-07",
  "history_from": "1990-01",
  "history_to": "2026-07",
  "total_transactions": 983157,
  "national": { /* object */ },
  "national_trend": [ /* 147 items */ ],
  "national_growth": { /* object */ },
  "regions": [ /* 5 items */ ],
  "towns": [ /* 55 items */ ],
  "flat_types": [ /* 5 items */ ],
  "coverage": [ /* 11 items */ ],
  "methodology": { /* object */ },
  "outlier_fence": { /* object */ },
  "stock": { /* object */ },
  "private": { /* object */ },
  "rent": { /* object */ }
}

The area payload

Every geographic level shares one shape. The sections, in the order a page renders them:

• name, slug, level, level_label, path, ancestors, siblings, dataset_version: identity and position in the taxonomy.
• window_months: the months of resales every HDB figure in this payload covers. Read it before comparing anything.
• stats: the HDB cross-section. Median price per square foot and square metre, median price, p20 and p80, the 95% interval on the median (ci_lo_psf, ci_hi_psf), median floor area, median remaining lease, and n, the count every one of those figures is computed from.
• headline: the named-flat-type figure the page leads with, with its own n, interval and publishable flag.
• median_psf_mix and mix_coverage: the mix-adjusted rate, the only figure areas are ranked on, and how much of the national flat-type weight this area's stock covers.
• by_type, by_lease_type, by_storey_type: the cross-section cut by flat type, remaining-lease band and storey band, each row carrying its own count and each band gated at 8.
• trend: the quarterly series back to 1990 where the area has one, with per-quarter counts, intervals, and the real-terms restatement.
• growth: year on year and compound annual change, with the endpoint quarters and span stated.
• rent: HDB renting-out medians and gross yields by flat type, with yield_withheld_because populated wherever a yield is not.
• private: the URA-derived statistics for the private market, where the area has one: resale rate, launches beside it, projects, rents by bedroom count, and size-band yields. Derived statistics only; no caveat-level records appear in any payload.
• children, nearby, compare_partner: the level below, the neighbours, and the area’s published comparison.
• transactions: individual HDB resales for the map and table, capped deterministically at 1,000 rows with transactions_total stating the real count. HDB rows only, at HDB’s own published grain (block and street, no unit).
• suppression fields throughout: where a figure is withheld, the payload says why, in the same words the page renders.

Conventions

• All price-per-area values are dollars per square foot, to three significant figures. Multiply by 10.7639 for dollars per square metre.
• Floor areas are in square metres, as HDB records them.
• null means suppressed or unavailable, never zero, and a suppressed figure’s reason ships beside it.
• window_months tells you how many months of resales a figure covers. Compare like with like.
• Counts are per register and never summed across registers: HDB resales and URA caveats record different events.

Licence, per register

The HDB-derived figures are published under the Singapore Open Data Licence version 1.0: reuse them, commercially included, with attribution to HDB via Data.gov.sg and IndexProp SG. The private figures are derived statistics from the URA Data Service, published under URA’s terms: the statistics may be cited with attribution to URA, but the underlying caveat and contract records are not redistributed here in any form, so there is no record-level private endpoint to ask for.