As I enter the complex process of spearheading a school’s renovation, I am embroiled in a tedious task of finding the most cost-efficient options. I have been saving those picturesque renovations and design ides on my Pinterest mood board. However, a renovation design only works when you add the element of realistic budget. When it comes to build-to-order HDB, the average spending on renovations is between S$30,000 to S$50,000. A resale flat can cost you around 50% more! Imagine that.