The cost is estimated depending on the size of your property. DS Infra’s cost per square foot might range from Rs 10 to Rs 100 if you’re only searching for design. The price of interior work per square foot may range from Rs 2,000 to Rs 3,000. A percentage of the total cost of interior design for a house is what DS Infra decides. After taking into account all goods and services. We will demand a design fee. This ranges from 6 to 15 percent of the cost of designing the inside of the entire house. This can go up to 20%, depending on the level of design and experience required.        A one-time interior design fee. This is based on the price per square foot, a portion of the overall cost, a commission, or a mix of two or more factors. A product’s markup simply put, means DS Infra will charge more for each item you buy.