It really is! I actually just broke ground on a huge project, I am building a primitive stone house, using most materials from my property. You can check it out here: @queenmountain/i-am-building-a-stone-house-my-primitive-off-grid-building-journey

You can head to those construction zones and pick thru their bins and ask them to put aside any spent materials. There is usually a TON of waste at these sites that are perfectly reusable.