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WOZ Waardeloket Scraper

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Retrieve official Dutch WOZ property valuations directly from the Kadaster WOZ Waardeloket and PDOK BAG register — the same sources the Dutch government uses. Submit a list of addresses and get back the full WOZ value history, building details, and GPS coordinates in one structured dataset.

What you get

• Full WOZ history — every assessment year on record (typically 10–15 years)
• Latest WOZ value and assessment year, ready to use without parsing
• BAG building data — build year, floor area, permitted use, status
• GPS coordinates — latitude/longitude for mapping or enrichment
• BAG and Kadaster IDs — nummeraanduidingId, adresseerbaarobjectId for downstream lookups
• Addresses resolved automatically — supply street + postcode, the actor handles the rest

Pricing

$1.49 per 1,000 results — flat rate, no hidden charges per API call or data source.

Input

{
"addresses":[
{"streetAddress":"Kloosterlaan 33","postcode":"1216NH","city":"Hilversum"},
{"streetAddress":"Herengracht 182","postcode":"1016BP","city":"Amsterdam"},
{"streetAddress":"Coolsingel 40","postcode":"3011AD","city":"Rotterdam"}
],
"maxConcurrency":5
}

Output

Each address produces one dataset record:

{
"address":"Kloosterlaan 33, 1216NH Hilversum",
"streetAddress":"Kloosterlaan 33",
"postcode":"1216NH",
"city":"Hilversum",
"gemeente":"Hilversum",
"lat":52.22007594,
"lon":5.13386319,
"nummeraanduidingId":"0402200001552236",
"adresseerbaarobjectId":"0402010001552237",
"wozObjectnummer":"402001234567",
"wozLatestValue":450000,
"wozLatestYear":2025,
"wozValues":[
{"peildatum":"2025-01-01","peiljaar":2025,"waarde":450000},
{"peildatum":"2024-01-01","peiljaar":2024,"waarde":428000},
{"peildatum":"2023-01-01","peiljaar":2023,"waarde":415000}
],
"building":{
"bouwjaar":1971,
"oppervlakte":143,
"gebruiksdoel":"woonfunctie",
"status":"Verblijfsobject in gebruik",
"pandId":"0402100000123456"
},
"scrapeTimestamp":"2026-05-19T12:30:00.000Z"
}

Output fields

Performance

Use cases

• Property valuation enrichment — add official WOZ history to your CRM or real estate data pipeline
• Mortgage and lending analysis — verify property values against official government assessments
• Portfolio monitoring — track WOZ changes year-over-year across an address list
• Market research — compare WOZ trajectories across neighbourhoods and municipalities
• Address geocoding — get coordinates and BAG IDs for any Dutch residential address

Data sources

All data is publicly available from official Dutch government sources. WOZ values are official government tax assessments, not market valuations.

Important notes

• WOZ values are only available for objects registered in the WOZ system (primarily residential and commercial real estate). Government buildings, infrastructure, and certain public objects have no WOZ value.
• The WOZ API requires a Dutch IP address — a Netherlands RESIDENTIAL proxy is used automatically.
• This actor is not affiliated with Kadaster or the Dutch government.

Run it on a schedule

This actor is built for repeat use. Set it to run daily, weekly, or hourly, and the data keeps flowing without you touching it.

• Schedule runs — open the actor, go to Schedules, and pick a cadence. Each run only charges you for the results it returns.
• Connect it to your stack — push results straight to Google Sheets, Slack, a webhook, or your database using Apify Integrations. No glue code needed.
• Pull results via API — every run writes a clean dataset you can fetch with one API call, ready for whatever you build on top of it.

Set it once and it runs on its own.

Need a custom scraper?

Unfenced Group builds Apify actors for any website — for free.

If the site you need isn't in our portfolio yet, just ask. We scope, build, and publish it at no cost to you. You only pay for results — we absorb the compute and proxy costs ourselves. Same pay-per-result pricing, same quality, same standards as every actor in this portfolio.

Get in touch: www.unfencedgroup.nl