Why factor 2? We had a regulation: 1 parking space per housing unit, 2 parking spaces if larger than 100sqm, 3 parking spaces if floor plan 150sqm.
Factor 2, because a flat "2 parking spaces per apartment" is unrealistic with many small apartments/flats... I absolutely like the reference to apartment size!
Doesn’t help anyway. People then have a double garage and still plenty of space in front, but where do they park? On the street..
I also need the garage as an extended storage room ;) - as long as it can be locked individually and is not visible inside, otherwise it won’t work...