For a family of 3 with one car, I already find 5 to be a lot, regardless of whether the space in front of the garage counts or not... There is zero shortage of space in the area. Rural, you can also park in large numbers directly on the street, there is always room...
But for a family of 3, a 200sqm place is also a lot. If a fourth one comes along, in 18 years there will already be 4 cars in front of the door + visitors. From that perspective, I find the idea from the office quite good. The argument about selling is an additional point. For us, one parking space was mandatory... Now the green strip is simply used... If you can even call it that anymore. Show a site plan. With 900sqm, you could probably fudge something somewhere. By the way, I’m in favor of idea 1. Just do it... It also states for us that a roof for the terrace may be a maximum of 3m long, but 36m wide. Here, nobody submitted an application; they just built 3.5m-6m and that was it.