Structural Steel Reinforcement is one of important cost factor in your house Construction Cost Estimate. Want to know amount you will be spending on Reinforcement Steel for your Home.? Check the details. On Thumbrule basis, approx 3 to 3.5 Kg Steel per sq.ft. of covered area is required for a Typical residential building. It can even go upto 4 to 4.5 Kg depending on Soil strata & Structural system design. However for most normal cases, 3.5 Kg per sq.ft. should suffice the Steel requirement. Acco