Before paying a 3%–5% provisional deposit (臨約), 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 mortgage cap.
Tap any of the 18 Official HK Districts to zoom into its 8 benchmark housing estates (144 total). Tap the floating 🛰️ Satellite button at top-right to visually inspect nearby retaining slopes, village rooftops, and water views.
Switch to 💰 Buy vs Rent and toggle between 70% Standard Bank and Max HKMC MIP (80%–90%) to see your true monthly payment, 5% Rates + 3% Gov Rent drag, 2026 marginal-relief Stamp Duty, and total Upfront Cash-to-Close.
Switch to 🏢 Cut Rent to compare your landlord's asking renewal against RVD benchmarks, see how much a 1.5-month vacancy + agency fee costs the owner, and copy a ready-to-send WhatsApp counter-offer in 中+EN, 繁體, or EN.
Type any street, village, or building name in English or Chinese to resolve coordinates via als.gov.hk and run parallel CSDI WFS checks within ±35m across bdbiar (OP age), BDS24 (Section 24 UBW orders), smr_bdy_poly (slopes), and oc_index.
Tap 👤 Buyer → 💼 Agent at the top-right of any card to flip the tool into professional closing mode: generate an EAA Form 1 Statutory Fact Sheet to prevent collapsed deals (撻訂), send a Positive-Carry Affordability Pitch to tenants, or calculate 2-Year Zero-Vacancy Retention.
bdbiar), EDB POA School Nets, LandsD Slope Maintenance (smr_bdy_poly), and Land Registry Owners' Corporations (oc_index).
als.gov.hk/lookup queries CSDI WFS within ±35m using exact layer names (typeNames=bdbiar, BDS24, smr_bdy_poly, oc_index) and explicitly flags unverified/village CoC records instead of guessing.