First you have to gather all your ideas by compiling all the pictures or by drawing those ideas that you have in order for you to easily compare ideas and have options on what you want your home to look like. Having pictures will be very helpful and easier for you to show builders exactly what you want, instead of just telling them what you want since it can lead to confusion or even disappointment if builders don't seem to understand your idea. House building will be so much easier if you do this first. Since you would of course want your own house to be exactly the way you pictured it.
After deciding on what you want your house to look like, the next thing you have to consider is your budget. How much are you willing to shell out to build your home? How much more do you need to build that dream house? Or would you need a home loan in order to start building your own house? This part can also be helpful in considering different kinds of materials that you can use to replace expensive materials that you want. You should also talk to your architect or builder about your budget in order for them to adjust and give you suggestions on how you can still have that dream house that you want with the budget that you have.
Lastly, you also have to consider the needs of the people who would be living in your house. How many rooms would your family need? Ask yourself these questions - do you need a backyard for your pets? Would you have friends coming over a lot, which would need a bigger space in the living room? The most important thing in your home is making everyone in the house feel comfortable. House building can be a lot of work but following these steps can make it easier for you to finally start living in that dream home you've always wanted.