Building Plot for sale in Castellterçol, Barcelona

Land for sale on the Paseo del Castell in Castellterçol. 621 m2 of surface area, practically flat. You can build 2 semi-detached houses (with a single construction permit) or a single-family house with four winds.
Very well located, a few meters from the forest that surrounds Castellterçol Castle, 350 meters from the commercial area and 250 meters from the public school.
Maximum height: 6.50 m / Ground floor + 1 floor.
Maximum occupancy on the ground floor: 40%
You can build 2 houses of 210 m2 each, or a 420 m2 house, in both cases with 2 floors. It is also possible to build a basement of the same surface as the ground floor.
The building must be set back 5 m from the street and 3 m from the sides.
Orientation of the main facade to the west. Very quiet and central area.
The land consists of two plots. They are sold together, not sold separately.