There are multiple steps and you need an experienced realtor and mortgage
person to guide you.
Let's say you want to borrow money to buy land and build a house.
Loan money to buy land is rather difficult and you may have to use cash.
After you get the land, you need to work with mortgage firm to borrow the
money. The money borrowed will be released term by term and project by
project. Let's say the mortgage firm release 100K for the foundation slab.
After it is built, the mortgage firm come and inspect. If it OK, they will
release another say 100K for wooden structure. Then they come and inspect
and then they release another portion of the fund for drywall, etc. etc...
It is very dynamic situation and most people cannot handle.