Valuing WOZ properties Amsterdam

Municipality of Amsterdam

Every year, the Amsterdam municipality determines the WOZ value of all real estate and uses a statistical calculation model to do so.

Last change on 21st of November 2024, at 9:11 (CET) | Publication Standard 1.0

• Publication category: Impactful algorithms
• Impact assessment: Field not filled in.
• Status: In use

General information

Theme

• Economy
• Living

Begin date

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Contact information

[e-mail]

Responsible use

Goal and impact

Every year, the City of Amsterdam determines the WOZ value of all real estate and uses a statistical calculation model to do so. Our Amsterdam appraisers use this model when appraising, they maintain it and check it. This method of valuation is called 'model-based valuation'. We then use the WOZ value to determine the amount of some municipal taxes, such as property tax (OZB). The National Tax Office uses the WOZ value for its national taxes. The Valuation Chamber is the national regulator. They supervise the way we value.

Considerations

The WOZ Accountability Document tells you how we determine the WOZ values for the current tax year. The document answers the following questions.

• What does the process of determining a WOZ value look like?
• Which data affect the WOZ value?
• What is model-based valuation?
• How do we verify?

In this description of the algorithm, we refer to the WOZ Accountability Document, as all information on model-based valuation and the calculation model can be found there.

The WOZ Accountability Document can be found here:

www.amsterdam.nl/wozverantwoording

Human intervention

In this description of the algorithm, we refer to the WOZ Accountability Document, as all information on model-based valuation and the calculation model can be found there.

The WOZ Accountability Document can be found here:

www.amsterdam.nl/wozverantwoording

Risk management

In this description of the algorithm, we refer to the WOZ Accountability Document, as all information on model-based valuation and the calculation model can be found there. The WOZ Accountability Document can be found here:

www.amsterdam.nl/wozverantwoording

Operations

Data

WOZ accountability document
The combination of a WOZ value and an address is personal data. We do not process any further personal data in the calculation model. We may process this personal data because of our statutory duty to value WOZ properties. This algorithm is part of a supplier's application.

In this description of the algorithm, we refer to the WOZ Accountability Document, as all information on the model-based valuation and the calculation model can be found there.

The WOZ Accountability Document can be found here:

www.amsterdam.nl/wozverantwoording