Budgeting is an essential aspect of DIY and home renovation projects to avoid unexpected expenses. Start by determining your overall budget and allocate funds for materials, tools, and any professional assistance you may require. Research prices of materials, compare quotes from suppliers, and consider recycling or repurposing items to save costs. Keep track of your expenses throughout the project and make adjustments as necessary. It's also advisable to set aside a contingency fund for unforeseen circumstances.