TIOX is a web application for Valuing Incourant and Agricultural Objects based on XML message traffic. TIOX was commissioned by the VNG and the “Waarderingskamer” to QDelft and Momentum Technologies and is available at http://www.wozdatacenter.nl/.
Under the Property Valuation Act (WOZ), municipalities must provide all objects with a value on the basis of which, among other things, property tax can be levied. For current objects such as homes and commercial property, the value is determined on the basis of transaction figures. For unmarketable objects, which are hardly ever sold no transaction data are available. Examples are school buildings, churches, hospitals, etc. The usual valuation methods such as the comparison method or the Rental Value Capitalization method are therefore not easily applicable.
In order to perform the valuation of these properties efficiently, uniformly and transparently, the VNG (Organisation of municipalities in the Netherlands) has drawn up valuation guides in cooperation with the valuation industry, large municipalities and the “Waarderingskamer” (or Valuation Chamber checks whether municipalities properly implement the Property Valuation Act (WOZ).
An appraisal guide is a document that municipalities and appraisal agencies use as a reference when performing an appraisal and contains a description of the appraisal methodology to be used, the key figures and the supporting market data. TIOX is the Internet version of the appraisal manuals and guides the appraiser in an automated manner when valuing an incourant object, which stimulates national uniformity.
An appraisal guide is a document that municipalities and appraisal agencies use as a reference when performing an appraisal and contains a description of the appraisal methodology to be used, the key figures and the supporting market data. TIOX is the Internet version of the appraisal manuals and guides the appraiser in an automated manner when valuing an incourant object, which stimulates national uniformity.
In addition to the “real” obsolete objects, valuation guides have also been prepared for common objects such as agricultural objects, swimming pools and recreational areas.
The existing valuation guides are shown below:
Taxation Guide | Valuation methodology | Available in TIOX |
|---|---|---|
Bus stations | GVW method | Yes |
Crematory | GVW method | Yes |
Culture | GVW method | Yes |
Defense | GVW method | Yes |
Healthcare | GVW method | Yes |
Infrastructure | GVW method | Yes |
Children’s farms | GVW method | Yes |
Monasteries | GVW method | Yes |
Laboratories | GVW method | Yes |
Dutch Railways | GVW method | Yes |
Utilities | GVW method | Yes |
Education | GVW method | Yes |
Government buildings | GVW method | Yes |
Parking | GVW method | Yes |
Sports | GVW method | Yes |
Telephony | GVW method | Yes |
Care | GVW method | Yes |
Wind Turbines | GVW method | Yes |
Motor Fuel Sales Points (MBVP’s) | Real Estate Standard Method | Yes |
NWS estates | See appraisal guide | Yes |
Recreation | DiscountedCashflow method | Not yet |
Residential trailers | Comparison method | Yes |
Agricultural buildings | Comparison method | Yes |
Agricultural land | Comparison method | Yes |
Ports and Industry | See appraisal guide | No |
GVW = Corrected Replacement Value
Furthermore, TIOX offers the ability to value obsolete properties that cannot be directly linked to existing valuation guides by means of a “dummy”.
TIOX, can be used:
- Through the web application.
- Through an external system and the web service. In this process, the external system operates like the Web application and asks TIOX to perform operations. The communication is through the web service. It is synchronous processing and further processing takes place in the external system.
- By calling the web service directly. By sending a message to TIOX, some data can be retrieved, such as the key figures and archetypes or the valuation guide itself. Further processing is the responsibility of the external system.
- Via asynchronous processing. TIOX offers the ability to submit WOZ objects in bulk for valuation.
- By modifying stored appraisals. The web application is always available to modify an appraisal. The data is then stored in TIOX. It is possible to retrieve appraisals from a specific date.
An example of processing may be as follows:
- External system offers in bulk a number of WOZ objects.
- TIOX checks the data, sends error messages and performs an assessment for all correctly entered WOZ properties.
- In the external system or through the web application, the data are corrected.
- If the data in the web application has been corrected, the external system may request that all appraisals performed as of a certain date be sent to the external system.
- The external system handles further valuation.
TIOX is basically a calculator that guides the appraiser during the valuation of a WOZ property in accordance with the valuation guidelines. Hereby TIOX offers the possibility to make a complete valuation report. TIOX is not intended to keep municipal records. Data such as cadastral data are not stored in the database. However, the appraiser has the possibility to enter the cadastral data of a property to be appraised so that TIOX can generate a complete appraisal report.