Budget – Once you have conceptualized your plan for renovations you need to know how much money do you have to spend versus what will it take to get you to your goal?
How much money you have may not get you to your goal. So, you may have to decide the actual dollar amount you can afford to spend, including any debt you plan to take on. Most important as it relates to the renovation is that you must have some reserve for renovation complications. For example, a basic complication is when you are changing a cabinet and you find that the wall behind the cabinet needs to be replaced, or watch the video under the unexpected expense kink. A general rule is that you will always run into unexpected expenses, so always include a minimum of 10% for the things you can't plan for.
There are a lot of useful tools out there to help plan such as – building cost.net. However, I believe in a simple excel spreadsheet which details all my materials and labor costs. You should see what tools are available and use what works best for you.