Trapped space
Usable area locked up by a removable obstacle — an over-wide corridor, an oversized sofa eating circulation, a redundant partition. The Subtract lever's target: space you can free without building or buying anything.
The pro's pitch number
When justifying a design fee, professionals reframe it against trapped space: reclaiming 60 sq ft in an ₹8,000/sq ft home unlocks ~₹4.8 lakh of owned-but-idle area — usually a multiple of the fee. Design unlocks an asset you've already paid for.