Data sources & attribution

Every computed number on this site traces to Singapore government open data. Current coverage: HDB resale data through Jun 2026, URA private transaction data through Jun 2026 (ratings generated 2026-06-10, rubric v0.2).

HDB resale transactions

Resale flat prices from the Housing & Development Board, accessed via data.gov.sg and made available under the Singapore Open Data Licence. We compute price-per-square-foot, town-level trends, liquidity and the HDB-town scorecards from this dataset.

URA private residential transactions

Private residential transaction records (unit-level price, area, district, market segment, sale type) from the Urban Redevelopment Authority’s Data Service, made available under the Singapore Open Data Licence. Note: URA publishes a rolling 5-year window of transactions. We archive every pull so our history extends beyond the live window; where a project’s launch predates the window, its scorecard is explicitly flagged as censored rather than treated as clean data.

OneMap — Singapore Land Authority

Project geocoding and location lookups use the OneMap API. Map and location data © Singapore Land Authority.

LTA DataMall

MRT/LRT station exits and bus-stop locations come from the Land Transport Authority’s DataMall. Walk times are computed from station-exit coordinates (straight-line distance × 1.35 detour factor at 80 m/min) — the formula is printed on each scorecard’s basis line.

What we deliberately don’t use

We do not scrape commercial property portals. Where their published analysis is relevant we cite it as editorial reference — their underlying transaction data is URA/HDB-derived in any case. Crowd sentiment, where present, is a manual, aggregated, anonymized editorial overlay and is labelled as such on every scorecard.

This page is the attribution notice required by the Singapore Open Data Licence. The agencies named here do not endorse HOROI or its ratings.