Appraisal report in the Netherlands: cost, contents and what changes in 2026

An appraisal report (in Dutch: taxatierapport) is an independent, written valuation of a home, prepared by a registered appraiser and, for mortgage purposes, validated by an institute such as the NWWI. Understand the home's value before you bid: the report itself only arrives after your offer is accepted and says nothing about whether that offer was logical.

Key takeaways

• An official appraisal report in the Netherlands typically costs between €550 and €1,000, depending on how many hours the appraiser spends on the file (Hypotheker).
• Per NVM, the report covers more than the market value: it also documents legal, structural and sustainability aspects of the home.
• The NWWI validates reports from affiliated appraisers and checks that the value is sufficiently motivated and substantiated.
• From 1 April 2026, the updated Model Appraisal Report Residential by the NRVT takes effect, making the KCAF foundation-risk report the primary source for foundation data.
• In Q3 2025, NVM agents sold 41,800 existing homes at an average price of €496,000 (+4.8% YoY); this is the market backdrop a current appraisal has to read.

What is an appraisal report?

In the Netherlands, an appraisal report (taxatierapport) is a validated document in which a registered appraiser substantiates a property's market value, and the NWWI (Nederlands Woning Waarde Instituut) is the institute that validates these reports and checks that the value is sufficiently motivated and underpinned. The appraiser is a certified, impartial professional who, unlike an aankoopmakelaar or verkoopmakelaar (the buyer's or seller's agent), does not represent a party in the transaction. The report carries weight precisely because of that independence: a Dutch bank or NHG-backed lender does not lend against a price you negotiated, it lends against a value an outsider can defend. There are two variants in practice: a validated report (the only kind accepted for a mortgage application or refinancing) and an unvalidated report, used for purposes outside the mortgage, such as a WOZ objection or an internal value check.

How much does an appraisal report cost in the Netherlands?

An official appraisal report in the Netherlands typically costs between €550 and €1,000, depending on how many hours the appraiser spends on the file and which firm you use (Hypotheker). Larger properties, complex ownership structures (think erfpacht, the leasehold construction common in Amsterdam, or a Vereniging van Eigenaren with deferred maintenance) and tricky foundation situations push the bill toward the upper end because they simply demand more research hours. On top of the appraiser's fee, an NWWI-validated report includes a fixed validation contribution that the institute charges per file; it is normally rolled into the final invoice rather than billed separately. Worth knowing: only a validated report can be used to apply for or refinance a mortgage, and almost every Dutch lender requires that. For an unvalidated purpose, such as a WOZ objection or a private value check before you talk to a financial adviser, a lighter, cheaper report is usually enough.

Start with a free Walter account to see a market-value indication for your target home before you book an appraiser, so you walk into the appointment with your own anchor instead of waiting for the bank's.

What is included in an appraisal report?

A Dutch appraisal report contains the market value plus the legal, structural and sustainability findings about the property, written up in a fixed format laid down by the appraisal sector and recently updated by the NRVT. The appraiser visits the home in person (typically 45 minutes to an hour, longer for larger properties) and records everything in a structured document. A current taxatierapport includes:

• Address, kadastrale data and ownership form (full ownership or erfpacht), verified via the Kadaster
• Property description: type, year of construction, layout, gebruiksoppervlakte (usable surface area) and volume per the NEN 2580 measurement standard
• Condition and installations, observed during the on-site visit
• Legal and zoning context: bestemmingsplan (zoning plan), monument status, VvE situation
• Comparable transactions with a per-reference explanation of why each property is genuinely comparable
• Energy label and sustainability features, a mandatory section since the energy-label update
• Foundation risk class from the KCAF foundation-risk report (primary source from 1 April 2026, per NRVT)
• Final market value plus any "special assumptions" the lender needs to know

The report is more than a price tag: it is the substantiation of that price, with the data accountable for it. For the lender it functions as the collateral anchor; for you as the buyer it is an after-the-fact check on the koopsom (the agreed purchase sum) you already committed to.

"Most buyers treat the appraisal like a safety net. It's more like a mirror, reflecting what you already decided. What actually protects you is the homework you do before the bid."
— Marcel de Graaf, CTO & Co-founder, Walter Living

How to write an appraisal report (and why you don't, as a buyer)

A formal appraisal report is not something a buyer writes; it is produced by a certified appraiser who follows a fixed model and is bound by the NRVT (Nederlands Register Vastgoed Taxateurs) register rules. The appraiser opens with the address, kadastrale data and ownership form, then documents the on-site observations, then builds the value argument using recent comparable transactions, then concludes with the market value plus any special assumptions. For an NWWI-validated file, the NWWI then reviews whether the value is sufficiently motivated and underpinned, and only then does the report receive a validation code that lenders accept. If you want your own structured value picture before you bid, that is not the appraiser's job; it is what tools like the Walter CMA (comparative market analysis) and a free Walter account are built for. Honestly: until the new 2026 model takes effect, comparing two appraisals on the same home could feel like reading two different documents; the updated NRVT model tightens that up.

How long is an appraisal report valid and how long does it take?

After the appraiser's site visit, the report itself is usually ready within a few days to one week, with NWWI validation adding another few working days on top. Plan, in total, closer to two weeks between booking the appraiser and having the validated report in the lender's hands; in busy periods or with complex properties (foundations, erfpacht, monuments) it can stretch to three. Once issued, a validated appraisal report is typically valid for six months from the inspection date, though some lenders only accept reports up to three months old. If the report expires before the notarial transfer, you need an extension or a fresh appraisal, with fresh costs. Per NVM, the report covers more than the value itself, and re-issuing one is not cosmetic: the comparable transactions and market context need to be current. Align the appraisal timing with your purchase agreement (in Dutch: koopovereenkomst) and the planned transfer date, and check when your mortgage offer becomes binding.

Is the appraised value higher than the WOZ value?

In a rising market the appraised value almost always sits above the WOZ value, and the gap is a matter of reference date, not method. The Dutch Waarderingskamer sets the WOZ value as of 1 January of the previous year, while a taxatierapport measures the market value on the date of the inspection. Between those two reference dates lies up to eighteen months of price movement, and in the current cycle that gap matters: NVM agents sold 41,800 existing homes in Q3 2025 at an average transaction price of €496,000, 4.8% above a year earlier, with homes spending 29 days on the market on average. In a falling market the reverse can be true, and the WOZ can land above the current market value. Neither number is the "real" price of your home; they answer different questions. The WOZ value drives your municipal tax assessment through waardering onroerende zaken; the appraisal report drives your mortgage.

Validated or unvalidated: which report do you need?

The choice between a validated and an unvalidated report depends on what you will do with it, not on what it costs. A validated taxatierapport is reviewed by an institute (in practice almost always the [NWWI](https://site.nwwi.nl/paginas-nwwi-website/hoe-werkt-het-nwwi-2/, occasionally the Taxateurs Unie) for form, substantiation and consistency, receives a unique validation code and cannot be changed afterwards without permission. Virtually every Dutch lender and the Nationale Hypotheek Garantie (NHG) accept only this validated version when issuing or refinancing a mortgage. An unvalidated report is for purposes outside the financing: a WOZ objection, a voluntary value assessment, or a conversation with a financial adviser about realistic scenarios. For certain newbuild mortgages or limited mortgage increases a desktop-taxatie (a lighter, model-based valuation without an on-site visit) is sometimes acceptable; the rules differ per lender. In most buyer cases the choice is not yours: the lender prescribes the report type, and you receive a mortgage offer based on it.

What changes for appraisal reports on 1 April 2026?

From 1 April 2026, an updated Model Appraisal Report Residential issued by the NRVT takes effect, with meaningful content and procedural changes for residential appraisers. The most important shift: the foundation-risk report from the Kennis Centrum Aanpak Funderingsproblematiek (KCAF) becomes the primary source for the foundation section of the appraisal. The appraiser's own foundation estimate disappears as the starting point, and a uniform classification frame replaces it, so buyer, seller and lender all read from the same source. For a home built op staal (without piles under the foundation) or a property in an area with known foundation risks, an unfavourable class can directly affect the appraised value because it triggers a separate note in the report. Sustainability gets more room in the new model (aligned with the energy label and its impact on home value), and the handling of special assumptions is tightened up. For you as a buyer, the practical consequence is that from April 2026 a taxatierapport becomes more comparable across appraisers and lenders, which moves the "should I have known this before I bid?" question earlier in the timeline, ideally before you sign the purchase agreement.

What an appraisal does not do (and where Walter is sharper)

An appraisal is not a second opinion on your bid, and it is not proof you paid a logical price. The Autoriteit Financiële Markten (AFM) supervises mortgage advice and sets standards for responsible lending, but the appraiser works for the bank's anchor, not for yours. So a taxatie can land well above or just under your koopsom without saying anything about whether your bid was sharp. Walter doesn't gamble. Walter explains: a free Walter account gives you the value indication and the comparable transactions before you make an offer, not afterwards. That is what the Walter CMA is built for, the same data and comparable references as a Dutch appraiser uses, only at a different moment in the process and for a different purpose. Not to replace the appraiser, because for your mortgage you need one; to give you your own anchor next to the bank's. Sometimes the best choice is: not to bid, and that is exactly the moment a value picture in advance pays off.

FAQ

Do you always need a validated appraisal report?

Only if the lender requires it, which is the case for nearly every mortgage application or refinancing in the Netherlands. For purposes outside the financing, such as a WOZ objection or a private value assessment, an unvalidated report is enough. For some newbuild or limited-increase files, lenders accept a desktop appraisal. Check what your bank or NHG accepts; that determines the report type.

What is the difference between an appraiser and a real-estate agent?

An appraiser is an independent, certified professional who determines the home's value impartially; an aankoopmakelaar or verkoopmakelaar (buyer's or seller's agent) represents one party in the transaction and is therefore not impartial. The same person can hold both qualifications, but on the same property they cannot act in both roles, because an appraiser must not be involved in the purchase or sale of the home they value. Check whether your appraiser is affiliated with the NWWI before you book.

How long is an appraisal report valid?

A validated appraisal report is usually valid for six months from the inspection date; some Dutch lenders only accept reports up to three months old. If the report expires before the notarial transfer, you need an extension or a fresh appraisal, which means new costs. Plan the appraisal close to signing the purchase agreement and the transfer date, and align it with when your mortgage offer takes effect.

Does the appraiser visit the home or can it be done remotely?

For a regular validated appraisal, the appraiser visits in person and does an inspection of 45 minutes to an hour, sometimes longer, because condition, layout and installations have to be verified on site. For some newbuild mortgages, refinancings or limited mortgage increases, a desktop appraisal without an on-site visit is accepted; that is based on model values and Kadaster references. The rules differ per lender and per NHG situation.

How does an appraisal report differ from a Walter CMA?

A taxatierapport is a formal, validated document used by a lender to underwrite a mortgage; it is produced after the bid by a registered appraiser following the NRVT model. A Walter CMA versus an appraisal (the comparative market analysis Walter builds for buyers) is a value picture built before the bid, using the same comparable-transactions logic, but aimed at the buyer's decision moment rather than the bank's collateral check. The two complement each other; they answer different questions in different parts of the buying process.

Start with a free Walter account and see the market-value indication for your target home before you schedule an appraisal: so you know the range before you bid, not only afterwards.