Most homes don't have dedicated calm space. Bedroom is for sleep, living room for entertainment, kitchen for cooking. One specific place — favourite chair, reading nook, garden bench — dedicated to calm becomes anchor for stress regulation.
What makes it work
Same place each time. Comfortable. Has what calm requires (book, tea, blanket, candle). No screens. Used specifically for slowing down.
Build the place; use it daily for 5-15 minutes; over months it becomes psychologically anchored to calm. Walking to it produces the calm before you sit down.