Move without a lift: the stair is the job
Fourth floor, winding stair, sofa in one piece: that is not a standard city move. Firms price carry time. Skip floor and photos and you get refusals or extras at the door.
What to measure and photograph
Stair width at the tightest point, landing under the window, door frame, and whether a piano or solid wardrobe clears the turn. Count floors as building management does. Outside: kerb to door, steps at the entrance.
Short answers
Do I need extra crew without a lift?
Often yes once heavy pieces go up several floors. The company decides from your photos. State the floor clearly or someone will price a lift.
The following notes are general information, not legal advice. Confirm details with the competent authority or a qualified advisor.