Press Y — the toolbar calls it Terrace / deck / entrance steps — then click the corners of the deck and press Enter, or click back on the first point, to close it. Corners snap to wall faces, so a deck lands flush against the building instead of a millimetre off it. Level, boards, steps and railing are all editable afterwards.
A terrace is building fabric, not an annotation: it never lands in the room schedule or the net floor area, and it is drawn on the elevations and in 3D.
Level and material
- Step down — how far the deck sits below the floor it belongs to, 0–2000 mm. A terrace defaults to a step below its floor, which is what keeps water out of the door.
- Material — wood, stone or concrete. Wood gets Board width, Board gap and Board angle; stone gets Flag size and Joint angle. All three are drawn with their real pattern on the plan and in 3D.
- Board gap — the drainage joint between boards, 5 mm by default. In 3D the boards are laid as real boards with that gap, so the decking reads in every render mode; 0 lays them tight.
An entrance landing is the same object worn differently: draw a small deck at the front door, switch its material to concrete, and step down its outer edges.
Steps down to the ground
Any edge can be turned into a flight of steps. The steps get their own Riser and Step going, and on a wooden deck Step boards sets the direction the tread boards run.
Railing
Railing is a single switch for the whole deck, and then each edge is cycled individually through rail → opening → none by clicking its numbered button under Railing per edge. An opening is a gap in the rail — where the steps come up, or where a path leaves the deck — and its width is set by the Opening field (400–6000 mm). Edges against a wall and edges that are already steps never get a railing, so they are not offered.
Reshaping one
A selected deck edits like an area: drag a corner handle to move it, drag a midpoint handle to add a corner, Alt-click a corner to remove it.
What this doesn’t do
- A deck is flat. There is no fall or slope across it. For ground that slopes, see ground surfaces.
- It is not a room. Terraces stay out of the room schedule and the habitable area on purpose.
- No planters, screens or pergolas as terrace parts — those come from the furniture catalog.
Next
Ground level, fences, paving and pools for the rest of the outside, and the deck sizes and dimensions guide for how big to make it.