Before paying a 3%–5% provisional deposit, check if a building intersects a LandsD private slope polygon, triggers a 30-year MBIS / pre-1987 Cap. 572 fire levy, lacks an Owners' Corporation ("三無大廈"), or hits the 75-minus-age bank loan cap.
At territory zoom, you see all 18 Official HK Districts. Tap any district pill to zoom into its 8 benchmark housing estates (144 total), or use the floating bottom pill to flip between 🛡️ Trap Check, 💰 Buy vs Rent, and 🏢 Cut Rent.
Switch to 💰 Buy vs Rent to see whether net rent covers a 70% mortgage after deducting management fees, 5% Government Rates, and the 75-minus-age tenure cap. Flats up to HK$4.0M qualify for the 2026 HK$100 Stamp Duty tier.
Switch to 🏢 Cut Rent to see RVD benchmark rent and how much a 1.5-month vacancy + agency fee costs your landlord, then copy a ready-to-send bilingual WhatsApp script.
Type any street, village, or building name in the top search bar to resolve exact coordinates via als.gov.hk and run parallel CSDI WFS checks within ±35m for Occupation Permit age, active UBW orders, private slopes, and Owners' Corporations.
bd_rcd_1631167534872_19764), EDB POA School Nets (edb_rcd_1633320960920_77011), LandsD Slope Maintenance (landsd_rcd_1637220975523_8411), and Land Registry Owners' Corporations (landreg_rcd_1668151937201_80478).
als.gov.hk/lookup resolves exact WGS84 coordinates, filters out non-residential utilities, and fires parallel WFS bounding-box queries (±35m) across Buildings Department OP records, Section 24/26 Statutory Orders (bd_rcd_1631167624557_40796), LandsD Slopes, and Land Registry Owners' Corporations.