Estate agents always use a standard measurement instruction to measure the size of a property. This measurement instruction describes precisely what may and may not be included in the calculation of a residential property’s floor area. Industry association NVM has made a short video (in Dutch) explaining this measurement instruction.
The measurement instruction sets out the form, content and structure for calculating the usable floor area. The stated usable floor area is indicative and should not be seen as a guarantee. The measurement instruction doesn’t entirely rule out differences in outcomes caused by e.g. differences of interpretation, amounts being rounded up or down or constraints when carrying out the measurements.