Measuring Outdoor Spaces and Annexes

Measuring outdoor spaces and annexes often raises questions. Is a veranda considered residential space? How should a detached guesthouse be measured? Here are the key rules to follow.

1. Building-Bound Outdoor Spaces

A veranda or carport attached to the main building is classified as a “building-bound outdoor space.” This classification also applies to structures placed directly against the main building, within 0.1 meters. If there is no direct connection, the space is excluded.

2. Detached Annexes

A detached guesthouse or office can be counted as usable residential area if it meets structural criteria such as insulation, climate control, and sufficient daylight. Detached annexes are measured separately and not combined with the main house.

3. Garages

A converted garage may qualify as residential area if:

• It is insulated.
• The internal climate can be regulated.
• The space is no longer accessible to vehicles.

4. Carports and Terraces

A carport without walls is not considered residential area but can qualify as a building-bound outdoor space. For terraces and conservatories, stricter rules apply. A conservatory must have proper climate control to be counted as usable area.

By adhering to these guidelines, you can accurately measure and classify outdoor spaces and annexes under NEN 2580.

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Explainer Video: How to Calculate Living Area and Other Areas

Would you like to quickly and easily learn how to calculate the living area and other surface areas of a home? Watch this video!