Start with a baseline grid and capture every quirk: radiator valves, crooked baseboards, bowed ceilings, and uneven plaster. Laser scans or meticulous hand measures create a living map that guides cabinet overhangs, filler strips, and clearances. This detective work routinely discovers shallow chases or alcoves that add precious liters of storage without crowding circulation.
Few urban walls run true. By scribing side panels and counters to the actual geometry, you eliminate gaps that collect crumbs and shadows. Thin, color-matched fillers disguise movement joints while keeping drawers square. Assume settlement continues; leave micro-expansion room and record reference lines so later maintenance remains simple, honest, and non-destructive.
Plan routes for electrical, water, and data before drawing a single shelf. Removable backs, ventilated cavities, and labeled panels protect future repairs and upgrades. Keep critical shutoffs reachable without tools. Consider appliance decoupling to reduce vibration, and schedule inspections early to align building rules, elevator bookings, and neighbors’ quiet hours.