It’s a lot easier than you may think.
But if your house’s foundation isn’t able to support the additional load, you’ll have to bring it up to spec.
Of course, it would be nice to use that time and money to keep moving things upward.
But the foundation is the foundation.
If you discover cracks, you’ll have to stop and fix them whatever the cost or delay.
When you’re building your dream house, it’s worth it.