WatKomtEr Koopcheck
Know what is coming to an address before you sign.
The free radar shows that something is going on within 1 km. The Koopcheck tells you what: every development by name, with the official source, in plain language and with our assessment of how it will affect you. As a PDF, in your inbox.
Please note: the developments themselves come from Dutch government sources. In the English report, the official titles and quotes stay in Dutch; everything we write ourselves is in English.
What is in the Koopcheck?
- Cover page and summary: address, date of the snapshot, radius, numbers per category and per time group.
- Map and aerial photo: all developments by distance and direction from the address.
- For each development: what the source says word for word, the plain-language translation, what it may mean for you, the impact score, what is still uncertain and the link to the official source.
- Sources and limitations: which sources were consulted, when, and what the report is and is not.
See a sample report (PDF) A real Koopcheck for Noordeinde Palace in The Hague.
From which official sources?
Official notices from municipalities, provinces and water boards (KOOP / Overheid.nl), zoning plans (Informatiehuis Ruimte), draft and adopted changes to the environmental plan (Digital System for the Environment and Planning Act) and current and planned roadworks (NDW). We show publications and plans from the past 18 months and what the road authorities have planned now.
Price
€9.95 one-off per address, incl. 21% VAT. No account, no subscription.
You order from your radar: first you see for free what is going on, then you decide whether you want the Koopcheck. Payment is handled securely by Mollie (currently iDEAL).
Honest about what it is
- A dated snapshot of public, official sources. Not all plans are in these sources and new ones can appear at any time.
- What the source says is a fact; "in plain language" is our translation; "what does this mean for you" and the impact score are assessments based on fixed rules.
- Compiled automatically. We check a lot, but a source can miss something, publish late or place it imprecisely, and our classification can misjudge an item. Every item links to the official source.
- Not legal advice and no substitute for research by an estate agent, notary or lawyer.
- Because the report is delivered digitally right after payment, you ask for immediate delivery when ordering and give up your right of withdrawal once it has been delivered. If delivery fails, you get your money back.
See also the terms and conditions, the privacy statement, the withdrawal function and our contact and company details.
Frequently asked questions
How can I see which building plans are coming to my area?
Enter your address in the free WatKomtEr radar: you immediately see how many building plans, permits, zoning plans and roadworks are going on within 1 kilometre. You can also search yourself, but then in three places: the official notices on Overheid.nl, the Omgevingsloket (Regels op de kaart) and the roadworks planning of your municipality.
How do I check building plans around a house I want to buy?
Do it before you make an offer. First check the address for free on the radar; if something is going on, the Koopcheck gives you, for each development, what the official source says, what it means and how big the impact is. Also ask the seller or estate agent what they know, look at the zoning plan for the address and get advice from a buying agent or notary if in doubt.
Where can I find the zoning plan (bestemmingsplan or omgevingsplan) for an address?
In the Omgevingsloket, via "Regels op de kaart". Since the Environment and Planning Act (1 January 2024), the bestemmingsplan is called omgevingsplan; old bestemmingsplannen remain in force for now as part of it. WatKomtEr shows zoning plans and changes to the environmental plan within 1 km from the past 18 months, so mainly what is changing.
Is there a free way to get notifications about my area?
Yes. Overheid.nl has a free email service that notifies you of new official notices around your address, such as permit applications. That is useful for keeping up to date. WatKomtEr shows everything from the past 18 months at once, including zoning plans and roadworks, on a map and in plain language.
Does the seller have to tell me about building plans in the area?
Partly. In general, a seller must tell you what they know and what is important to you, but as a buyer you also have your own duty to investigate: you are expected to be able to find publicly published plans yourself. So ask about it, record the answers and check the official sources. This is general information, not legal advice.
Which addresses does WatKomtEr work for?
For any address in the Netherlands. We look within 1 kilometre of the address in official notices from municipalities, provinces and water boards, in zoning plans, in changes to the environmental plan and in the roadworks planning.
How up to date is the data?
We retrieve the data from the official sources and keep it up to date every few hours. We look at notices and plans from the past 18 months, and at roadworks as they are planned now. The report states for each source when the data was retrieved.
Can something be missing or wrong?
Yes, that is possible. WatKomtEr works automatically with the data that governments publish. A government can publish something late or without a (precise) location, and our classification can misjudge or merge an item. We regularly check our method with samples, but we do not guarantee completeness. That is why every development links to the official source. Check it before an important decision, and also ask the seller, estate agent or municipality what they know.
What if the radar finds nothing?
Then we tell you honestly and do not recommend the Koopcheck for that address: you do not pay for a report without content. Please note: not all plans are in official sources yet, so "nothing found" is no guarantee that nothing will come.
What is in the Koopcheck, and what is not?
Every development by name, with what the source says word for word, a plain-language explanation, what it may mean for the address, an impact score, a map and aerial photo, what is still uncertain and the link to the source. It is not legal advice and does not replace research by an estate agent, notary or lawyer.
How much does it cost and how quickly do I get the report?
The radar is free. The Koopcheck costs €9.95 one-off per address, including VAT, without an account or subscription. You pay via iDEAL and usually receive the report as a PDF in your inbox within a few minutes, with an invoice.
Can I withdraw from my order?
Yes, free of charge, as long as the report has not been delivered, via the Withdraw page. Because the report is delivered digitally straight away, the right of withdrawal lapses once it has been delivered; you agree to this when ordering. If the report is not in order, you have the usual statutory rights.
Who is behind WatKomtEr?
WatKomtEr is an independent Dutch company registered with the Chamber of Commerce, not a government body. We only use public, official sources. All details are on the Contact and company details page.
What do you do with my data?
If you only use the radar, we store nothing about you. If you order a Koopcheck, we only keep what is needed for the report, delivery and payment, and delete it automatically. We use no tracking cookies; we count visits anonymously on our own server.
Want to know more? Read our guides and explanation of sources and method, the terms and conditions, the privacy statement and the disclaimer, or get in touch.