Of course, it is understandable to want to optimize the garden. However, this does not happen by simply dividing the plot in the middle and then placing two houses each with a 3m boundary distance. A solution worth considering here would be, for example, to realize the parking spaces of both houses together at the street and then put a semi-detached house on the remaining plot. You save the hassle with the rear access road, you save space because the path to the house can be much narrower than 3m since a footpath can be significantly narrower, and you save the boundary distances. 360sqm is not a size for a detached house; that is the domain of semi-detached houses. And both you and the neighbors should be aware that with the small plot, there will be no more privacy than with a well-planned semi-detached house.