Why use the CBS index
The Prijsindex Bestaande Koopwoningen is the Netherlands' official residential property price index for existing homes. It's compiled monthly by CBS (the Dutch national statistics office) in cooperation with the Kadaster (Land Registry), using actual sale prices of all registered transactions.
Funda and Pararius are listing platforms — useful for finding properties, but the values they show are asking prices, not actual sale prices. The CBS index is built from every Kadaster-registered transaction.
CBS is the source the Dutch central bank, the ECB, and Dutch tax authorities use for housing market analysis.
How WealthMap tracks Dutch property
Enter your Dutch property: province (Noord-Holland, Zuid-Holland, Utrecht, etc.) or major city (Amsterdam, Rotterdam, Den Haag, Utrecht), purchase date, purchase price. WealthMap applies the CBS index change for your region since the purchase date.
Example: an Amsterdam apartment bought in May 2019 for €450,000. The Amsterdam CBS index rose roughly 38% by January 2026 (with the 2022-2023 correction included). WealthMap shows your current value as €621,000 with a +38% gain — plus a monthly chart of how it tracked vs the Amsterdam index.
Data is pulled from CBS on-device. No subscription. No scraping.
Major cities and provinces
CBS publishes the index for all 12 Dutch provinces plus the four largest cities individually: Amsterdam, Rotterdam, Den Haag, Utrecht (the 'G4'). WealthMap supports each one — your Amsterdam apartment tracks against the Amsterdam index, not the Noord-Holland average.
Beyond Dutch property
If you're a Dutch resident with property abroad — a Barcelona apartment, a London flat, a Lisbon townhouse — WealthMap tracks each one against its own country's official index. The dashboard aggregates everything in EUR.