About KongInsight
What it does
Hong Kong publishes an unusual amount of open data about its buildings. It is spread across at least six portals, in three naming conventions, with no data dictionary, and almost none of it is joined to anything else. KongInsight joins it to the building footprint and puts it on one map.
- 342,249 building footprints with year built, storeys and height above ground, from the Lands Department 3D model and Buildings Department occupation permits.
- 5,109 buildings that appear on the Buildings Department’s published lists of statutory orders and notices — unauthorised building works, mandatory building inspection, mandatory window inspection, dangerous buildings — each with its own page across 18 districts.
- 54 school net pages (36 Primary One Admission nets, 18 secondary school nets) with the real Education Bureau boundary, the schools inside it, and the residential blocks within 150 m of the line.
- 11,953 land-use zones, 375,154 land lots, statutory building height limits, and 57 CSDI datasets in 9 packs.
- Sun and shadow for a real date and time, computed against the surrounding 3D city model and the distant terrain — so the answer accounts for the tower across the street and for Victoria Peak.
Who makes it
KongInsight is made by one person: Nguyen Manh Cuong, trading as KongInsight. It is not owned by an estate agency, a developer or a property portal, and it does not carry listings or advertising. That independence is the point — the site exists to say what the government record shows, including when that is inconvenient for whoever is trying to sell you the flat.
Questions, corrections and data disputes: manhcuongincusar@gmail.com. If a page misrepresents a building, tell us and we will fix it.
Where the data comes from
Everything on this site is Hong Kong government open data, retrieved from data.gov.hk and the Common Spatial Data Infrastructure (CSDI) portal. Every block of data on every page carries the issuing department, the dataset name and the date we retrieved it. The full list is on the data sources page.
We keep a daily snapshot. The government publishes the current state of these datasets and overwrites it — there is no history, and a record that disappears cannot be retrieved. Since 2026-08-31 we have archived 9 datasets (4 Buildings Department order lists and 5 Food and Environmental Hygiene Department licence lists) every single day. That archive is the only way to see when a record entered or left a list.
What it deliberately does not do
- No property valuations or asking prices. We show the Rating and Valuation Department’s district averages as general reference, never a figure for a specific flat.
- No school rankings. We show which schools are in a net and how the Education Bureau allocation works. We do not rank them.
- No “haunted flat” (凶宅) records.
- No claim that an order is still outstanding. The Buildings Department publishes orders issued and orders cleared as two separate lists with different start dates, and never publishes which are still open. We say “has been under an order”, and we explain why on the how to read this data page.
Price
Free, with no account and no usage limit, while we launch. If that changes, the pricing page will say so first.