The whole thing occupies sixty centimetres of wall. One oak shelf, oiled, bracketed firmly enough to trust with ceramics, at eye level above the end of the counter. On it: a hand grinder, a dripper on its glass server, a lidded jar of beans, two cups hanging from hooks screwed into the shelf's underside. The kettle stands on the counter directly below. Nothing else belongs to the operation, and nothing about it spills into the rest of a kitchen that has no room to give.
Small kitchens fail at rituals when the ritual has to be assembled — grinder from one cupboard, filters from a drawer, beans from wherever they landed. The counter is contested ground, so the ceremony dies of setup costs. Putting everything on one dedicated shelf changes the arithmetic: the corner is always ready, and making coffee begins with reaching, not gathering. Vertical space is the one thing small kitchens have in surplus. A single shelf borrows nothing from the counter and returns five minutes of calm to every morning.
Assemble it in this order: shelf and brackets (€30 or so, in real wood — it will be looked at daily), then grinder, dripper, jar. Resist expansion. The corner works because it is complete at five objects, and a sixth begins the clutter it was built to refuse. If the espresso machine dream arrives someday, it will need its own negotiation. Until then, everything the morning needs hangs and stands in arm's reach, on wood that looks better each year it serves.