How do you calculate interior design cost per square foot in India?

Calculating interior design costs on a per-square-foot basis requires establishing clear project boundaries upfront. First, confirm whether the measurement relies on carpet area or built-up area, as this significantly shifts the baseline. Next, separate pure design fees from material and labor execution. For design consultancy, practitioners often charge a fixed fee per square foot or a percentage of total project execution. For turnkey work, the square-foot cost is derived by totaling projected expenses across civil work, custom cabinetry, electrical, ceilings, and finishes, then dividing by the floor area. Because costs vary widely depending on city tier, material selections, and site conditions, per-square-foot rates should serve only as initial budgetary guides rather than fixed bids.