Installing wall shelves can be a DIY project if you have basic tools and follow the instructions carefully. However, if you’re dealing with heavy materials, uneven walls, or complex installations (like drilling into brick or concrete), hiring a professional ensures safety and precision. A professional can also help with custom-built shelves that need exact measurements and stability. For most simple installations, such as floating shelves, a confident DIYer can handle the task with the right tools and patience.