What to check in a seller questionnaire

When you are preparing to bid on a Dutch home, the seller questionnaire can feel like just another PDF in the sales file. It is not. In the Netherlands, this document is often called the vragenlijst and it can contain useful clues about defects, renovations, legal restrictions, VvE issues, leasehold, nuisance, and items included in the sale.

The key is not to treat it as a guarantee. A seller questionnaire is usually based on what the seller knows or declares. Before you bid, use it to decide what to ask, what to verify, whether to adjust your price, and whether you need conditions such as a building inspection.

Pre-bid check: Have the address and the seller questionnaire? Huisscan can help you check a Dutch property before you bid by turning one address and uploaded documents into a clear pre-bid report with available Dutch property data, risk signals, document analysis, and buyer questions.

Seller questionnaire when buying a house in the Netherlands: what it is

A seller questionnaire is a form completed by the seller, usually through the selling agent. The format can differ, but it often covers questions about:

• known defects or past repairs;
• leaks, moisture, roof issues, sewer problems, or foundation concerns;
• renovations, extensions, permits, and guarantees;
• asbestos, soil contamination, oil tanks, or environmental matters;
• legal rights or restrictions, such as erfdienstbaarheden;
• apartment owners’ association details, known as the VvE;
• leasehold, called erfpacht;
• nuisance, disputes, or boundary issues;
• items that stay behind or are removed.

Two Dutch concepts matter:

• Mededelingsplicht: the seller’s duty to disclose relevant known information.
• Onderzoeksplicht: the buyer’s duty to investigate before buying.

The balance between these duties can be important, but do not try to solve legal questions from the form alone. If something is material, ask your buyer agent, notary, legal adviser, inspector, or another qualified professional.

Also check whether you have the related document called the lijst van zaken. This is the list of items included or excluded from the sale, such as curtains, appliances, flooring, garden items, or solar panels.

How it can affect your bid, conditions, or decision to walk away

The seller questionnaire matters because it can change the risk profile before you make an offer.

A single unclear answer does not automatically mean you should stop. But it may mean you should ask for evidence, change your bid, or include a condition.

For example:

• If there are signs of leakage or roof repairs, you may want a bouwkundige keuring: a building inspection.
• If an apartment VvE has planned major maintenance, you may want to understand possible future costs.
• If an extension, dormer, roof terrace, or structural change is mentioned, you may want to check permits or drawings.
• If the seller does not know much because they never lived there, the risk may be different from an owner-occupied home.
• If there is leasehold, shared access, or a right of way, you may need notarial or legal clarification before bidding.

The best time to clarify these points is before your offer. After bidding, your negotiating position may be weaker, and deadlines can feel tighter.

Practical checklist: what to check in the seller questionnaire

Use this checklist line by line before you bid.

1. Property basics

Check that the questionnaire matches the property you are viewing:

• address and apartment number;
• house type and floor level;
• storage, parking, garden, balcony, or roof terrace;
• cadastral details if provided;
• living area compared with the brochure and measurement report;
• whether outbuildings, sheds, or extensions are included.

If the sales brochure, questionnaire, and floor plan do not match, ask why.

2. Known defects and repairs

Look carefully for answers about:

• roof leaks or past leakage;
• damp, mould, or moisture problems;
• cracks, subsidence, or foundation concerns;
• sewer or drainage issues;
• heating, boiler, ventilation, and electrical installations;
• wood rot, pests, or structural problems;
• past insurance claims.

Ask whether repairs were temporary or permanent. Request invoices, inspection reports, guarantees, or photos if available.

3. Renovations, extensions, and permits

Pay attention to work such as:

• an extension;
• dormer window, called a dakkapel;
• roof terrace;
• removed load-bearing wall;
• new bathroom or kitchen;
• underfloor heating;
• solar panels;
• converted attic, garage, or basement.

For larger changes, ask whether permits, structural calculations, completion reports, or contractor warranties are available. If documents are missing, decide whether you can price the uncertainty or need professional advice first.

4. Legal rights, restrictions, and boundaries

Check for references to:

• erfdienstbaarheid: an easement, such as a right of way;
• shared alleyways, walls, driveways, or gardens;
• boundary disputes with neighbours;
• rights for cables, pipes, or access;
• obligations in the title deed;
• parking rights or parking permits;
• private roads or shared maintenance obligations.

These issues can affect daily use and future resale. If the wording is unclear, ask for the relevant deed or notarial explanation.

5. Apartment and VvE issues

If you are buying an apartment, the VvE is part of the property risk.

Check whether the questionnaire mentions:

• monthly service charges;
• VvE reserve fund;
• planned maintenance;
• recent or expected one-off contributions;
• building insurance;
• disputes within the VvE;
• short-term rental restrictions;
• pets, flooring rules, or renovation approval rules.

Also ask for VvE documents such as minutes, annual accounts, budget, maintenance plan, and the splitsingsakte: the deed of division.

6. Leasehold and recurring obligations

If the property is on erfpacht, you do not own the land in the same way as freehold ownership. There may be leasehold payments, conditions, or future changes.

Check:

• whether the land is freehold or leasehold;
• whether the leasehold payment is bought off, fixed, or periodic;
• which conditions apply;
• whether any private lease contracts exist, for example for solar panels or equipment.

Leasehold can affect affordability, valuation, and mortgage assessment. Ask a mortgage advisor, notary, or buyer agent if you are unsure.

7. Environment, nuisance, and surroundings

Look for answers about:

• soil contamination;
• old oil tanks;
• asbestos-containing materials;
• flooding or water nuisance;
• noise, odour, or nuisance from roads, rail, industry, neighbours, or hospitality;
• protected monument status;
• zoning or future development nearby.

These topics are easy to overlook during a viewing, especially if you visit during a quiet moment.

8. Occupancy and items included

Check whether the property will be delivered:

• vacant and empty;
• with tenants, lodgers, or temporary occupants;
• with rented appliances or leased solar panels;
• with fixtures included or excluded;
• with defects in items that remain.

Compare the seller questionnaire with the lijst van zaken. If something matters to you, such as flooring, curtains, kitchen equipment, garden items, or charging equipment, make sure it is clearly confirmed.

Red flags and contradictions to look for

A red flag does not always mean “do not buy”. It means “do not bid blindly”.

Watch for:

• Many answers marked onbekend: unknown.
• “No defects” while photos show stains, cracks, fresh paint patches, or moisture marks.
• Recent renovations without invoices, drawings, guarantees, or permits.
• An apartment with limited VvE information or no recent minutes.
• A roof terrace, extension, or converted attic that is not clearly reflected in other documents.
• A seller who never lived in the property and cannot answer practical questions.
• A low-maintenance claim for an older property without inspection evidence.
• Leasehold, easements, or shared access described vaguely.
• Solar panels or installations that are leased rather than owned.
• Different living areas in the brochure, floor plan, and documents.

If the form says “not applicable” but the property clearly has that feature, ask for clarification. Small inconsistencies can be harmless, but they can also reveal that the document was completed too quickly.

Cross-check the answers with Dutch property data and documents

Do not rely on the questionnaire alone. Use it together with available Dutch property data and the rest of the sales file.

Useful sources and documents include:

• BAG data: official building and address data, such as construction year and use type.
• Kadaster information: cadastral parcel, ownership-related information, and registered rights.
• Energy label: useful for comparing insulation and energy performance, but not a full technical inspection.
• WOZ value: municipal assessed value; helpful context, not the same as market value.
• Omgevingsloket / omgevingsplan: zoning, permitted use, and planning context.
• Municipal permit records: useful for extensions, structural changes, dormers, or roof terraces.
• VvE documents: minutes, accounts, budget, maintenance plan, insurance, and deed of division.
• Title deed: may include rights, obligations, clauses, or restrictions.
• Soil and environmental information: relevant for contamination, tanks, or historical land use.
• Noise, water, climate, monument, or foundation risk maps: useful as risk signals, not as final diagnoses.

For expats buying a house in the Netherlands, this cross-check is especially important because Dutch sales documents often use short legal or technical terms that are easy to underestimate.

Questions to ask the selling agent before you bid

Use the seller questionnaire to ask specific questions, not general ones.

Good pre-bid questions include:

• Can you explain why this answer is marked unknown?
• Can the seller provide invoices, reports, permits, guarantees, or photos?
• Has the issue been repaired, and by whom?
• Were there any insurance claims related to leakage, storm damage, fire, or structural issues?
• Are there known plans for major VvE maintenance or extra owner contributions?
• Are there any restrictions on renovation, rental, pets, flooring, or short-stay use?
• Are the solar panels, boiler, kitchen equipment, or other installations owned or leased?
• Are there any clauses the seller expects to include in the purchase agreement, such as an age clause or non-occupancy clause?
• Can important clarifications be confirmed in writing before the bid deadline?
• Would the seller accept a condition for building inspection or another relevant check?

If the answer affects your price, financing, renovation budget, or willingness to buy, do not leave it as a verbal comment only. Ask your adviser how to handle it properly in your offer or purchase agreement.

What Huisscan can help you check

Huisscan is designed for a practical pre-bid property check Netherlands workflow: one Dutch address plus the documents you have.

You can upload the seller questionnaire, sales brochure, list of items, energy label, VvE documents, title deed, or other available files. Huisscan then helps organise the information into a clear pre-bid report.

A Huisscan pre-bid report can help you see:

• available Dutch property data for the address;
• risk signals related to the property, location, documents, and ownership context;
• unclear or missing answers in the seller questionnaire;
• contradictions between documents;
• Dutch terms explained in plain English;
• questions to ask the selling agent, inspector, mortgage advisor, buyer agent, or notary.

Huisscan does not replace a building inspector, appraiser, mortgage advisor, lawyer, or notary. It helps you prepare better questions and make a clearer decision before you bid.

FAQ

Is a seller questionnaire mandatory when buying a house in the Netherlands?

There is no single seller questionnaire used in every Dutch sale, but it is very common in the sales file. The exact format depends on the agent and transaction. Treat it as an important information document, and ask your adviser if you need to understand its legal effect.

Can I rely on the seller questionnaire?

Use it, but do not rely on it alone. It is usually based on the seller’s knowledge and declarations. Cross-check it with property data, permits, VvE documents, inspection findings, and professional advice where needed.

What should I do if the seller answers “unknown”?

Ask why it is unknown and whether documents are available. “Unknown” may be reasonable, especially if the seller did not live in the property. But if the topic is important, such as foundation, leakage, permits, VvE costs, or leasehold, you may need to adjust your bid, add a condition, or pause.

What is the difference between the seller questionnaire and the list of items?

The seller questionnaire, or vragenlijst, covers property information and known issues. The lijst van zaken states which movable or fixed items stay behind, are taken away, or can be bought separately. Check both before bidding.

Should expats get help reading Dutch property documents?

Yes, if you are not fully comfortable with Dutch legal and property terms. Words such as erfpacht, erfdienstbaarheid, VvE, splitsingsakte, and ouderdomsclausule can affect your understanding of the risk. Huisscan can help structure the documents and questions, but specialist advice may still be needed.

A seller questionnaire is most useful when you read it before the bid, compare it with other data, and turn unclear answers into concrete questions.

Check the address before you bid.