Thank you for the inputs.
The front of the inter-terrace house is estimated to be the standard 6m wide. The current door is just a regular door 1m width on the concrete wall fence. There is no drainage between the fence and road, which is a wide 2 lanes straight road. Most of the neighbours including the immediate neighbours have all rebuilt their house to 3-stories with fence and car gate. So I interpret as possible to rebuild and open a car gate provided that house has nothing blocking in front like the rest of houses.
The 2 boxes, each about 1m width has another about 0.6m gap between them. And then there is the lamp post and the gap to the boxes. That leaves only about 2m from the edge, which is insufficient for a gate for car.
It seems as though that the boxes and lamp post are all concentrated to the front of this house when the other houses rebuilt. The boxes look new.