6. Not planning and costing your renovation before you start work
While important in any renovation project, this is particularly critical with major structural changes where you’re using a builder to add rooms, move walls, put in new bathrooms or bedrooms, etc. It’s critical to do all the planning up front before any physical work is done so you’re not making any changes along the way. If you’re making variations midway through a structural renovation, the cost blowout is significant and can have a major impact on your profit. Look to have everything in place, even down to the tiles and taps you’re going to use, before any work commences.