- for foundation in a slope or ground pit
- vestibule depth 50cm
- for fitting a single door
- monolithic robust construction
- square-shaped retaining wall sized 245 cm x 245 cm
- extension of the cellar with additional watertight chambers
- foundation of the cellar under the building, driveway for cars, terrace, gazebo
- electrical installation with accessories
- ventilation system with accessories
- interior design options and door