et’s say you are having a 2 bedroom apartment for sale in Mumbai with a valuation of Rs 6 Crore and your interior designer is budgeting for the 2 BHK house price of Rs 8 Crore. So, in this case we expect that your 2 BHK house interior design cost should be at least 10% of the apartment price. However, if you have 2 BHK house price of Rs 10 Crore and your designer is budgeting for the house interior at Rs 1 Crore, then it is clear that your 2 BHK house interior design cost should be much more than 10% of the price. Bedroom Curtains