Understanding building year, floor area and BAG records

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Ashkan Yarmoradi

Last updated on Nov 7, 2026

The building chapter uses available BAG information from the Dutch register of addresses and buildings. It may show the building year, registered area, use, status and object identifiers.

Check what the record describes

A building and an individual dwelling are not always the same object. This matters for apartments, subdivisions, multiple house numbers and mixed-use buildings. Check the full address, including its suffix.

A registered area may differ from the measurement used in a sales listing. The original building year does not tell you when the roof, kitchen, installations or insulation were replaced. A registered use is not, by itself, permission for every proposed activity or alteration.

Useful follow-up questions

  • Which recent measurement report and floor plan apply to this home?
  • What alterations were carried out, and what documents support them?
  • Does the area refer to my unit or another part of the building?
  • Have recent changes reached the register yet?

Ask the seller, estate agent or source owner to clarify a material discrepancy. See reporting conflicting information and planning and permits.